The Experts below are selected from a list of 5019 Experts worldwide ranked by ideXlab platform
Jochen Gier - One of the best experts on this subject based on the ideXlab platform.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Journal of Turbomachinery, 2013Co-Authors: Philippe Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are iden- tified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non- axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under inves- tigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aero- dynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the un- steady pressure, temperature and entropy fields between the ro- tor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measure- ments and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Volume 8: Turbomachinery Parts A B and C, 2012Co-Authors: Philipp Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are identified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non-axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under investigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aerodynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the unsteady pressure, temperature and entropy fields between the Rotor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measurements and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.Copyright © 2012 by ASME
Philippe Jenny - One of the best experts on this subject based on the ideXlab platform.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Journal of Turbomachinery, 2013Co-Authors: Philippe Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are iden- tified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non- axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under inves- tigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aero- dynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the un- steady pressure, temperature and entropy fields between the ro- tor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measure- ments and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.
K. Engel - One of the best experts on this subject based on the ideXlab platform.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Journal of Turbomachinery, 2013Co-Authors: Philippe Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are iden- tified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non- axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under inves- tigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aero- dynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the un- steady pressure, temperature and entropy fields between the ro- tor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measure- ments and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Volume 8: Turbomachinery Parts A B and C, 2012Co-Authors: Philipp Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are identified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non-axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under investigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aerodynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the unsteady pressure, temperature and entropy fields between the Rotor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measurements and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.Copyright © 2012 by ASME
Mona Brettschneider - One of the best experts on this subject based on the ideXlab platform.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Journal of Turbomachinery, 2013Co-Authors: Philippe Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are iden- tified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non- axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under inves- tigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aero- dynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the un- steady pressure, temperature and entropy fields between the ro- tor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measure- ments and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Volume 8: Turbomachinery Parts A B and C, 2012Co-Authors: Philipp Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are identified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non-axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under investigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aerodynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the unsteady pressure, temperature and entropy fields between the Rotor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measurements and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.Copyright © 2012 by ASME
M. G. Rose - One of the best experts on this subject based on the ideXlab platform.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Journal of Turbomachinery, 2013Co-Authors: Philippe Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are iden- tified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non- axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under inves- tigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aero- dynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the un- steady pressure, temperature and entropy fields between the ro- tor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measure- ments and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.
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Unsteady Rotor Hub Passage Vortex Behavior in the Presence of Purge Flow in an Axial Low Pressure Turbine
Volume 8: Turbomachinery Parts A B and C, 2012Co-Authors: Philipp Jenny, M. G. Rose, Mona Brettschneider, K. Engel, Reza S Abhari, Jochen GierAbstract:The paper presents an experimental and computational study of the unsteady behavior of the Rotor Hub passage vortex in an axial low-pressure turbine. Different flow structures are identified as having an effect on the size, strength, shape, position and the unsteady behavior of the Rotor Hub passage vortex. The aim of the presented study is to analyze and quantify the sensitivities of the different flow structures and to investigate their combined effects on the Rotor Hub passage vortex. Particular attention is paid to the effect of the rim seal purge flow and of the unsteady blade row interaction. The Rotor under investigation has non-axisymmetric end walls on both Hub and shroud and is tested at three different rim seal purge flow injection rates. The Rotor has separated pressure sides at the operating point under investigation. The non-dimensional parameters of the tested turbine match real engine conditions. The 2-sensor Fast Response Aerodynamic Probe (FRAP) technique and the Fast Response Entropy Probe (FENT) systems developed by ETH Zurich are used in this experimental campaign. Time-resolved measurements of the unsteady pressure, temperature and entropy fields between the Rotor and stator blade rows are taken and analyzed. Furthermore, the results of URANS simulations are compared to the measurements and the computations are also used to detail the flow field. The experimental results show a 30% increase of the maximum unsteadiness and a 4% increase of the loss in the Hub passage vortex per percent of injected rim seal cooling flow. Compared to a free stream particle, the rim seal purge flow was found to do 60% less work on the Rotor.Copyright © 2012 by ASME
