The Experts below are selected from a list of 36 Experts worldwide ranked by ideXlab platform
H.a. Warda - One of the best experts on this subject based on the ideXlab platform.
-
Integral Pumping Devices for Dual Mechanical Seals: Hydraulic Performance Generalization Using Dimensional Analysis
Journal of Engineering for Gas Turbines and Power-transactions of The Asme, 2018Co-Authors: H.a. Warda, Ihab G. Adam, A. B. Rashad, Muhannad W. Gamal-aldinAbstract:An experimental study is carried out investigating hydraulic performance for various designs of dual-mechanical-seal cartridges with integral Pumping-Rings. The tested devices are classified into two main families: radial-flow and axial-flow. The radial-flow family utilizes the modified-paddle-wheel (MPW) Pumping Ring with either a radial or a tangential oriented cartridge outlet port, while the axial-flow family utilizes the Pumping scroll (PS) Pumping Ring in the following cartridge-geometries: single-Pumping-scroll (SS) and double-Pumping-scroll (DS); as both types can be of either a radial or a tangential outlet port; and of an internal clearance value complying with American Petroleum Institute (API) 682 standard or smaller clearance. An experimental setup is constructed, and appropriate instrumentation is employed to measure inlet pressure, outlet pressure, rotational speed, and barrier fluid flow rate acquiRing flow-head characteristic curves. Moreover, empirical generalized characteristic curves are deduced from experimental observations obtained from the present study and previous companion work. The generalized curves can be employed in estimating Pumping Ring performance for a different size or other operation conditions such as varying rotational speed or fluid type. They can be also utilized to validate numerical simulations for geometrically similar designs.
-
Bi-directional integral Pumping devices for dual mechanical seals: Influence of mesh type on accuracy of numerical simulations
Elsevier, 2018Co-Authors: H.a. Warda, A. B. Rashad, Ig Adam, Muhannad W. Gamal-aldinAbstract:A numerical study is conducted to simulate the performance of barrier fluid flow through a bi-directional dual mechanical seal with an integral radial Pumping Ring. Standard K-ε model is implemented as a turbulence model. Multiple Reference Frame approach is implemented to model the rotation of the Pumping Ring. The present study is a sequel to a previous companion work done in the area of visualization of barrier fluid flow. Improvements to the previous work depended on two aspects. First, a multi-block hybrid (tetra, prism and hexa) mesh is used where it is aimed to reduce numerical false diffusion by orienting the cells to be aligned with flow direction as much as possible. Second, expanding model’s boundaries to include inboard sealing faces. The numerical results are validated against Q-ΔP curves produced from experimental tests where an experimental setup is constructed, and appropriate instrumentation is employed to measure the pressure, temperature, and flow rate of the barrier fluid.Moreover, implementation of two spatial discretization schemes is illustrated to verify the numerical performance of each method. Second order Upwind and QUICK (Quadratic Upstream Interpolation for Convective Kinematics) schemes are used for the discretization of convective terms. The validity of implementation of each method is investigated since higher-order methods are known to be more computationally expensive but their accuracy are higher. The results by the hybrid mesh indicate that the use of the Second-order scheme provides more accurate prediction of Q-ΔP curves than the previous companion work. Moreover, the impact of using the QUICK scheme is the increased computational time while providing slightly more accurate Q-H curve relative to the second-order scheme.Finally, expanding model’s boundaries to include inboard sealing faces revealed that closed barrier fluid circulation takes place in the vicinity of the inboard sealing faces indicating poor renewal of the barrier fluid contained within this zone compared to the outboard sealing faces. Keywords: Integral Pumping device, Dual mechanical seals, Barrier fluid flow, Hybrid mesh, CF
-
Bi-directional integral Pumping devices for dual mechanical seals: Influence of mesh type on accuracy of numerical simulations
Alexandria Engineering Journal, 2018Co-Authors: H.a. Warda, A. B. Rashad, Ig Adam, Muhannad W. Gamal-aldinAbstract:Abstract A numerical study is conducted to simulate the performance of barrier fluid flow through a bi-directional dual mechanical seal with an integral radial Pumping Ring. Standard K- e model is implemented as a turbulence model. Multiple Reference Frame approach is implemented to model the rotation of the Pumping Ring. The present study is a sequel to a previous companion work done in the area of visualization of barrier fluid flow. Improvements to the previous work depended on two aspects. First, a multi-block hybrid (tetra, prism and hexa) mesh is used where it is aimed to reduce numerical false diffusion by orienting the cells to be aligned with flow direction as much as possible. Second, expanding model’s boundaries to include inboard sealing faces. The numerical results are validated against Q- Δ P curves produced from experimental tests where an experimental setup is constructed, and appropriate instrumentation is employed to measure the pressure, temperature, and flow rate of the barrier fluid. Moreover, implementation of two spatial discretization schemes is illustrated to verify the numerical performance of each method. Second order Upwind and QUICK (Quadratic Upstream Interpolation for Convective Kinematics) schemes are used for the discretization of convective terms. The validity of implementation of each method is investigated since higher-order methods are known to be more computationally expensive but their accuracy are higher. The results by the hybrid mesh indicate that the use of the Second-order scheme provides more accurate prediction of Q- Δ P curves than the previous companion work. Moreover, the impact of using the QUICK scheme is the increased computational time while providing slightly more accurate Q-H curve relative to the second-order scheme. Finally, expanding model’s boundaries to include inboard sealing faces revealed that closed barrier fluid circulation takes place in the vicinity of the inboard sealing faces indicating poor renewal of the barrier fluid contained within this zone compared to the outboard sealing faces.
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Elsevier, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve. Keywords: Dual mechanical seal, Axial Pumping Ring, Numerical study, Experimental, Computational fluid dynamic
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Alexandria Engineering Journal, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Abstract Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve.
A. B. Rashad - One of the best experts on this subject based on the ideXlab platform.
-
Integral Pumping Devices for Dual Mechanical Seals: Hydraulic Performance Generalization Using Dimensional Analysis
Journal of Engineering for Gas Turbines and Power-transactions of The Asme, 2018Co-Authors: H.a. Warda, Ihab G. Adam, A. B. Rashad, Muhannad W. Gamal-aldinAbstract:An experimental study is carried out investigating hydraulic performance for various designs of dual-mechanical-seal cartridges with integral Pumping-Rings. The tested devices are classified into two main families: radial-flow and axial-flow. The radial-flow family utilizes the modified-paddle-wheel (MPW) Pumping Ring with either a radial or a tangential oriented cartridge outlet port, while the axial-flow family utilizes the Pumping scroll (PS) Pumping Ring in the following cartridge-geometries: single-Pumping-scroll (SS) and double-Pumping-scroll (DS); as both types can be of either a radial or a tangential outlet port; and of an internal clearance value complying with American Petroleum Institute (API) 682 standard or smaller clearance. An experimental setup is constructed, and appropriate instrumentation is employed to measure inlet pressure, outlet pressure, rotational speed, and barrier fluid flow rate acquiRing flow-head characteristic curves. Moreover, empirical generalized characteristic curves are deduced from experimental observations obtained from the present study and previous companion work. The generalized curves can be employed in estimating Pumping Ring performance for a different size or other operation conditions such as varying rotational speed or fluid type. They can be also utilized to validate numerical simulations for geometrically similar designs.
-
Bi-directional integral Pumping devices for dual mechanical seals: Influence of mesh type on accuracy of numerical simulations
Elsevier, 2018Co-Authors: H.a. Warda, A. B. Rashad, Ig Adam, Muhannad W. Gamal-aldinAbstract:A numerical study is conducted to simulate the performance of barrier fluid flow through a bi-directional dual mechanical seal with an integral radial Pumping Ring. Standard K-ε model is implemented as a turbulence model. Multiple Reference Frame approach is implemented to model the rotation of the Pumping Ring. The present study is a sequel to a previous companion work done in the area of visualization of barrier fluid flow. Improvements to the previous work depended on two aspects. First, a multi-block hybrid (tetra, prism and hexa) mesh is used where it is aimed to reduce numerical false diffusion by orienting the cells to be aligned with flow direction as much as possible. Second, expanding model’s boundaries to include inboard sealing faces. The numerical results are validated against Q-ΔP curves produced from experimental tests where an experimental setup is constructed, and appropriate instrumentation is employed to measure the pressure, temperature, and flow rate of the barrier fluid.Moreover, implementation of two spatial discretization schemes is illustrated to verify the numerical performance of each method. Second order Upwind and QUICK (Quadratic Upstream Interpolation for Convective Kinematics) schemes are used for the discretization of convective terms. The validity of implementation of each method is investigated since higher-order methods are known to be more computationally expensive but their accuracy are higher. The results by the hybrid mesh indicate that the use of the Second-order scheme provides more accurate prediction of Q-ΔP curves than the previous companion work. Moreover, the impact of using the QUICK scheme is the increased computational time while providing slightly more accurate Q-H curve relative to the second-order scheme.Finally, expanding model’s boundaries to include inboard sealing faces revealed that closed barrier fluid circulation takes place in the vicinity of the inboard sealing faces indicating poor renewal of the barrier fluid contained within this zone compared to the outboard sealing faces. Keywords: Integral Pumping device, Dual mechanical seals, Barrier fluid flow, Hybrid mesh, CF
-
Bi-directional integral Pumping devices for dual mechanical seals: Influence of mesh type on accuracy of numerical simulations
Alexandria Engineering Journal, 2018Co-Authors: H.a. Warda, A. B. Rashad, Ig Adam, Muhannad W. Gamal-aldinAbstract:Abstract A numerical study is conducted to simulate the performance of barrier fluid flow through a bi-directional dual mechanical seal with an integral radial Pumping Ring. Standard K- e model is implemented as a turbulence model. Multiple Reference Frame approach is implemented to model the rotation of the Pumping Ring. The present study is a sequel to a previous companion work done in the area of visualization of barrier fluid flow. Improvements to the previous work depended on two aspects. First, a multi-block hybrid (tetra, prism and hexa) mesh is used where it is aimed to reduce numerical false diffusion by orienting the cells to be aligned with flow direction as much as possible. Second, expanding model’s boundaries to include inboard sealing faces. The numerical results are validated against Q- Δ P curves produced from experimental tests where an experimental setup is constructed, and appropriate instrumentation is employed to measure the pressure, temperature, and flow rate of the barrier fluid. Moreover, implementation of two spatial discretization schemes is illustrated to verify the numerical performance of each method. Second order Upwind and QUICK (Quadratic Upstream Interpolation for Convective Kinematics) schemes are used for the discretization of convective terms. The validity of implementation of each method is investigated since higher-order methods are known to be more computationally expensive but their accuracy are higher. The results by the hybrid mesh indicate that the use of the Second-order scheme provides more accurate prediction of Q- Δ P curves than the previous companion work. Moreover, the impact of using the QUICK scheme is the increased computational time while providing slightly more accurate Q-H curve relative to the second-order scheme. Finally, expanding model’s boundaries to include inboard sealing faces revealed that closed barrier fluid circulation takes place in the vicinity of the inboard sealing faces indicating poor renewal of the barrier fluid contained within this zone compared to the outboard sealing faces.
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Elsevier, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve. Keywords: Dual mechanical seal, Axial Pumping Ring, Numerical study, Experimental, Computational fluid dynamic
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Alexandria Engineering Journal, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Abstract Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve.
Muhannad W. Gamal-aldin - One of the best experts on this subject based on the ideXlab platform.
-
Integral Pumping Devices for Dual Mechanical Seals: Hydraulic Performance Generalization Using Dimensional Analysis
Journal of Engineering for Gas Turbines and Power-transactions of The Asme, 2018Co-Authors: H.a. Warda, Ihab G. Adam, A. B. Rashad, Muhannad W. Gamal-aldinAbstract:An experimental study is carried out investigating hydraulic performance for various designs of dual-mechanical-seal cartridges with integral Pumping-Rings. The tested devices are classified into two main families: radial-flow and axial-flow. The radial-flow family utilizes the modified-paddle-wheel (MPW) Pumping Ring with either a radial or a tangential oriented cartridge outlet port, while the axial-flow family utilizes the Pumping scroll (PS) Pumping Ring in the following cartridge-geometries: single-Pumping-scroll (SS) and double-Pumping-scroll (DS); as both types can be of either a radial or a tangential outlet port; and of an internal clearance value complying with American Petroleum Institute (API) 682 standard or smaller clearance. An experimental setup is constructed, and appropriate instrumentation is employed to measure inlet pressure, outlet pressure, rotational speed, and barrier fluid flow rate acquiRing flow-head characteristic curves. Moreover, empirical generalized characteristic curves are deduced from experimental observations obtained from the present study and previous companion work. The generalized curves can be employed in estimating Pumping Ring performance for a different size or other operation conditions such as varying rotational speed or fluid type. They can be also utilized to validate numerical simulations for geometrically similar designs.
-
Bi-directional integral Pumping devices for dual mechanical seals: Influence of mesh type on accuracy of numerical simulations
Elsevier, 2018Co-Authors: H.a. Warda, A. B. Rashad, Ig Adam, Muhannad W. Gamal-aldinAbstract:A numerical study is conducted to simulate the performance of barrier fluid flow through a bi-directional dual mechanical seal with an integral radial Pumping Ring. Standard K-ε model is implemented as a turbulence model. Multiple Reference Frame approach is implemented to model the rotation of the Pumping Ring. The present study is a sequel to a previous companion work done in the area of visualization of barrier fluid flow. Improvements to the previous work depended on two aspects. First, a multi-block hybrid (tetra, prism and hexa) mesh is used where it is aimed to reduce numerical false diffusion by orienting the cells to be aligned with flow direction as much as possible. Second, expanding model’s boundaries to include inboard sealing faces. The numerical results are validated against Q-ΔP curves produced from experimental tests where an experimental setup is constructed, and appropriate instrumentation is employed to measure the pressure, temperature, and flow rate of the barrier fluid.Moreover, implementation of two spatial discretization schemes is illustrated to verify the numerical performance of each method. Second order Upwind and QUICK (Quadratic Upstream Interpolation for Convective Kinematics) schemes are used for the discretization of convective terms. The validity of implementation of each method is investigated since higher-order methods are known to be more computationally expensive but their accuracy are higher. The results by the hybrid mesh indicate that the use of the Second-order scheme provides more accurate prediction of Q-ΔP curves than the previous companion work. Moreover, the impact of using the QUICK scheme is the increased computational time while providing slightly more accurate Q-H curve relative to the second-order scheme.Finally, expanding model’s boundaries to include inboard sealing faces revealed that closed barrier fluid circulation takes place in the vicinity of the inboard sealing faces indicating poor renewal of the barrier fluid contained within this zone compared to the outboard sealing faces. Keywords: Integral Pumping device, Dual mechanical seals, Barrier fluid flow, Hybrid mesh, CF
-
Bi-directional integral Pumping devices for dual mechanical seals: Influence of mesh type on accuracy of numerical simulations
Alexandria Engineering Journal, 2018Co-Authors: H.a. Warda, A. B. Rashad, Ig Adam, Muhannad W. Gamal-aldinAbstract:Abstract A numerical study is conducted to simulate the performance of barrier fluid flow through a bi-directional dual mechanical seal with an integral radial Pumping Ring. Standard K- e model is implemented as a turbulence model. Multiple Reference Frame approach is implemented to model the rotation of the Pumping Ring. The present study is a sequel to a previous companion work done in the area of visualization of barrier fluid flow. Improvements to the previous work depended on two aspects. First, a multi-block hybrid (tetra, prism and hexa) mesh is used where it is aimed to reduce numerical false diffusion by orienting the cells to be aligned with flow direction as much as possible. Second, expanding model’s boundaries to include inboard sealing faces. The numerical results are validated against Q- Δ P curves produced from experimental tests where an experimental setup is constructed, and appropriate instrumentation is employed to measure the pressure, temperature, and flow rate of the barrier fluid. Moreover, implementation of two spatial discretization schemes is illustrated to verify the numerical performance of each method. Second order Upwind and QUICK (Quadratic Upstream Interpolation for Convective Kinematics) schemes are used for the discretization of convective terms. The validity of implementation of each method is investigated since higher-order methods are known to be more computationally expensive but their accuracy are higher. The results by the hybrid mesh indicate that the use of the Second-order scheme provides more accurate prediction of Q- Δ P curves than the previous companion work. Moreover, the impact of using the QUICK scheme is the increased computational time while providing slightly more accurate Q-H curve relative to the second-order scheme. Finally, expanding model’s boundaries to include inboard sealing faces revealed that closed barrier fluid circulation takes place in the vicinity of the inboard sealing faces indicating poor renewal of the barrier fluid contained within this zone compared to the outboard sealing faces.
A.a. Mahgoub - One of the best experts on this subject based on the ideXlab platform.
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Elsevier, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve. Keywords: Dual mechanical seal, Axial Pumping Ring, Numerical study, Experimental, Computational fluid dynamic
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Alexandria Engineering Journal, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Abstract Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve.
E. M. Wahba - One of the best experts on this subject based on the ideXlab platform.
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Elsevier, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve. Keywords: Dual mechanical seal, Axial Pumping Ring, Numerical study, Experimental, Computational fluid dynamic
-
Experimental and numerical investigation of axial single scroll integral Pumping devices for dual mechanical seals
Alexandria Engineering Journal, 2018Co-Authors: H.a. Warda, E. M. Wahba, A. B. Rashad, A.a. MahgoubAbstract:Abstract Radial flow Pumping Rings receive the flow radially which is perpendicular on the shaft while axial flow Pumping Rings receive the flow in a direction parallel to the shaft (axially). An experimental investigation is carried out to evaluate the single axial Pumping Ring performance with a non API design radial clearance. The experimental setup is constructed according to API plan 53B with an accumulator-based seal support system in the barrier circuit loop. Furthermore, a numerical investigation is conducted to provide a reliable numerical model represented by ANSYS Fluent by creating an acceptable meshing and turbulence modeling using the experimental results as a validation method. As for the numerical investigation, it is indicated that K-epsilon realizable turbulence model is the best numerical model in terms of the least error deviation between the numerical model’s performance curve and the experimental performance curve.
-
Integral Pumping Devices for Dual Mechanical Seals: Experiments and Numerical Simulations experimental and numerical investigation is carried out to evaluate the performance
2015Co-Authors: H.a. Warda, E. M. Wahba, E. A. SelimAbstract:An experimental and numerical investigation is carried out to evaluate the performanceof alternative Pumping Ring designs for dual mechanical seals. Both radial-flow andaxial-flow Pumping Rings are considered in the present study. An experimental setup isconstructed, and appropriate instrumentation are employed to measure the pressure, tem-perature, and flow rate of the barrier fluid. A parametric study is carried out to investi-gate the effect of pump rotational speed, barrier fluid accumulator pressure, and barrierfluid inlet temperature on the performance of the Pumping Rings. Experiments are alsoused to evaluate the effect of different geometric parameters such as the radial clearancebetween the Pumping Ring and the surrounding gland, and the outlet port orientation.Moreover, a numerical study is conducted to simulate the flow field for the radial pump-ing Ring designs under different operating parameters. The computational fluid dynamics(CFD) model implements a multiple reference frame (MRF) technique, while turbulenceis modeled using the standard k-epsilon model. Numerical simulations are also used tovisualize the flow of the barrier fluid within the dual seal cavity. Present results indicatethat the pump rotational speed and the orientation of the outlet port have a significanteffect on the performance of the Pumping Ring. On the other hand, the effects of barrierfluid accumulator pressure and inlet temperature are minimal on the performance. Thestudy also shows that reducing the radial clearance between the rotating Ring and the sta-tionary outer gland would significantly improve the performance of axial Pumping Rings.Moreover, comparisons between the computational and experimental results show goodagreement for Pumping Ring configurations with tangential outlet (TO) ports and atmoderate rotational speeds. [DOI: 10.1115/1.4028384]Keywords: dual mechanical seal, integral Pumping device, radial Pumping Ring, axialPumping Ring, computational fluid dynamics
-
Integral Pumping Devices for Dual Mechanical Seals: Experiments and Numerical Simulations
Journal of Engineering for Gas Turbines and Power-transactions of The Asme, 2014Co-Authors: H.a. Warda, E. M. Wahba, E. A. SelimAbstract:An experimental and numerical investigation is carried out to evaluate the performance of alternative Pumping Ring designs for dual mechanical seals. Both radial-flow and axial-flow Pumping Rings are considered in the present study. An experimental setup is constructed, and appropriate instrumentation are employed to measure the pressure, temperature, and flow rate of the barrier fluid. A parametric study is carried out to investigate the effect of pump rotational speed, barrier fluid accumulator pressure, and barrier fluid inlet temperature on the performance of the Pumping Rings. Experiments are also used to evaluate the effect of different geometric parameters such as the radial clearance between the Pumping Ring and the surrounding gland, and the outlet port orientation. Moreover, a numerical study is conducted to simulate the flow field for the radial Pumping Ring designs under different operating parameters. The computational fluid dynamics (CFD) model implements a multiple reference frame (MRF) technique, while turbulence is modeled using the standard k-epsilon model. Numerical simulations are also used to visualize the flow of the barrier fluid within the dual seal cavity. Present results indicate that the pump rotational speed and the orientation of the outlet port have a significant effect on the performance of the Pumping Ring. On the other hand, the effects of barrier fluid accumulator pressure and inlet temperature are minimal on the performance. The study also shows that reducing the radial clearance between the rotating Ring and the stationary outer gland would significantly improve the performance of axial Pumping Rings. Moreover, comparisons between the computational and experimental results show good agreement for Pumping Ring configurations with tangential outlet (TO) ports and at moderate rotational speeds.
