The Experts below are selected from a list of 2286 Experts worldwide ranked by ideXlab platform
Xueguan Song - One of the best experts on this subject based on the ideXlab platform.
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multidisciplinary optimization of a Butterfly Valve
Isa Transactions, 2009Co-Authors: Xueguan Song, L Wang, Seok Heum Baek, Young Chul ParkAbstract:A Butterfly Valve is a type of flow control device, typically used to regulate fluid flow. This paper proposes a new process to meet desired needs in Valve design that is characterized by the complex configuration. First, the need is identified according to the Valve user/company, and then the problem is defined with a characteristic function. Second, the initial model of Valve is made, and then the initial analysis including fluid and/or structural analysis is carried out to predict the fluid and/or structural performance of the Valve. Third, the optimization in the form of mathematical functions, which considers single or multiple objective and/or discipline, is handled. This part includes the design of computer experiment, approximation technique, topology optimization and sizing optimization. Finally, the validation experiment is conducted based on the optimum result to verify the accuracy of the optimization. An example is provided to confirm the availability of the process proposed here.
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Analysis and optimization of a Butterfly Valve disc
Proceedings of the Institution of Mechanical Engineers Part E: Journal of Process Mechanical Engineering, 2009Co-Authors: Xueguan Song, L Wang, Y.c. ParkAbstract:AbstractA Butterfly Valve is a type of flow control device, which is widely used to regulate a fluid flowing through a section of pipe. Currently, analyses and optimization are of special important in the design and usage of Butterfly Valves. For the analysis, finite element method (FEM) is often used to predict the safety of Valve disc, and computational fluid dynamics (CFD) is commonly used to study the flow characteristics of Valve. However, it is difficult to obtain accurate results for the optimization of Butterfly Valve due to the high non-linearities. For this reason, metamodels or surrogate model methods are extensively employed. This paper integrates metamodel with FEM and CFD analysis to optimize a traditional Butterfly Valve, where the weight of the Valve disc is the design objective, and the strength safety of disc and the pressure loss coefficient of Valve are constraints. Kriging model is employed as a surrogate model to formulate the objectives and constrains, and the orthogonal array is us...
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numerical analysis of Butterfly Valve prediction of flow coefficient and hydrodynamic torque coefficient
2007Co-Authors: Xueguan SongAbstract:Butterfly Valves are commonly used as control equipments in applications where the pressure drops required of the Valves are relatively low. As shutoff Valve (on/off service) or throttling Valves (for flow or pressure control), the higher performance and the better precision of Butterfly Valves are required. Thus it’s more and more essential to know the flow characteristic around the Valve. Due to the fast progress of the flow visualization and numerical technique, it becomes possible to observe the flows around a Valve and to estimate the performance of a Valve. In this paper, three-dimensional numerical simulations by commercial code CFX were conducted to observe the flow patterns and to measure Valve flow coefficient and hydrodynamic torque coefficient when Butterfly Valve with various opening degrees and uniform incoming velocity were used in a piping system. By contrast, a group of experimental data is used to compare with the data obtained by CFX simulation to investigate the validity of numerical method. Researching these results did not gave only access to understand the process of the Valve flows at different Valve opening degrees, but also was made to determine the accuracy of the employed method. Furthermore, the results of the three-dimensional analysis can be used in the design of Butterfly Valve in the industry.
Li Feng - One of the best experts on this subject based on the ideXlab platform.
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Three triple offset Butterfly Valve
2000Co-Authors: Li FengAbstract:The article analyses the improvement of three triple offset Butterfly Valve in structure and other advantages,and gives the detail of the analysis about the pressure angle of the three triple offset Butterfly Valve. At last,tells the principle of the two triple offset structure used in practice.
Y.c. Park - One of the best experts on this subject based on the ideXlab platform.
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Dynamic analysis of three-dimensional flow in the opening process of a single-disc Butterfly Valve
Proceedings of the Institution of Mechanical Engineers Part C: Journal of Mechanical Engineering Science, 2010Co-Authors: Lintao Wang, X.g. Song, Y.c. ParkAbstract:AbstractA numerical dynamic analysis is carried out to simulate a three-dimensional flow and to study the performance of a single-disc Butterfly Valve with a diameter of 1.35 m in the opening process. The unsteady fluid flow during the opening process is studied by using the moving grid technique. The turbulent separated flow is also studied to understand the unsteady flow better through velocity distributions and pressure distributions on the mid-symmetric plane. The formation of vortexes is also discussed. Then the characteristics of Butterfly Valves such as the flow coefficient, the dynamic torque coefficient, and the drag coefficient are studied. The curves of these characteristics corresponding with the variational Valve opening angle are obtained to investigate the performance of the single-disc Butterfly Valve.
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Analysis and optimization of a Butterfly Valve disc
Proceedings of the Institution of Mechanical Engineers Part E: Journal of Process Mechanical Engineering, 2009Co-Authors: Xueguan Song, L Wang, Y.c. ParkAbstract:AbstractA Butterfly Valve is a type of flow control device, which is widely used to regulate a fluid flowing through a section of pipe. Currently, analyses and optimization are of special important in the design and usage of Butterfly Valves. For the analysis, finite element method (FEM) is often used to predict the safety of Valve disc, and computational fluid dynamics (CFD) is commonly used to study the flow characteristics of Valve. However, it is difficult to obtain accurate results for the optimization of Butterfly Valve due to the high non-linearities. For this reason, metamodels or surrogate model methods are extensively employed. This paper integrates metamodel with FEM and CFD analysis to optimize a traditional Butterfly Valve, where the weight of the Valve disc is the design objective, and the strength safety of disc and the pressure loss coefficient of Valve are constraints. Kriging model is employed as a surrogate model to formulate the objectives and constrains, and the orthogonal array is us...
L Wang - One of the best experts on this subject based on the ideXlab platform.
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multidisciplinary optimization of a Butterfly Valve
Isa Transactions, 2009Co-Authors: Xueguan Song, L Wang, Seok Heum Baek, Young Chul ParkAbstract:A Butterfly Valve is a type of flow control device, typically used to regulate fluid flow. This paper proposes a new process to meet desired needs in Valve design that is characterized by the complex configuration. First, the need is identified according to the Valve user/company, and then the problem is defined with a characteristic function. Second, the initial model of Valve is made, and then the initial analysis including fluid and/or structural analysis is carried out to predict the fluid and/or structural performance of the Valve. Third, the optimization in the form of mathematical functions, which considers single or multiple objective and/or discipline, is handled. This part includes the design of computer experiment, approximation technique, topology optimization and sizing optimization. Finally, the validation experiment is conducted based on the optimum result to verify the accuracy of the optimization. An example is provided to confirm the availability of the process proposed here.
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Analysis and optimization of a Butterfly Valve disc
Proceedings of the Institution of Mechanical Engineers Part E: Journal of Process Mechanical Engineering, 2009Co-Authors: Xueguan Song, L Wang, Y.c. ParkAbstract:AbstractA Butterfly Valve is a type of flow control device, which is widely used to regulate a fluid flowing through a section of pipe. Currently, analyses and optimization are of special important in the design and usage of Butterfly Valves. For the analysis, finite element method (FEM) is often used to predict the safety of Valve disc, and computational fluid dynamics (CFD) is commonly used to study the flow characteristics of Valve. However, it is difficult to obtain accurate results for the optimization of Butterfly Valve due to the high non-linearities. For this reason, metamodels or surrogate model methods are extensively employed. This paper integrates metamodel with FEM and CFD analysis to optimize a traditional Butterfly Valve, where the weight of the Valve disc is the design objective, and the strength safety of disc and the pressure loss coefficient of Valve are constraints. Kriging model is employed as a surrogate model to formulate the objectives and constrains, and the orthogonal array is us...
Charles Dalton - One of the best experts on this subject based on the ideXlab platform.
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a cfd study of the flow field resultant force and aerodynamic torque on a symmetric disk Butterfly Valve in a compressible fluid
Journal of Pressure Vessel Technology-transactions of The Asme, 2008Co-Authors: Zachary Leutwyler, Charles DaltonAbstract:Butterfly Valve performance coefficients are necessary for predicting the required torque necessary to operate the Valve along with other essential parameters necessary for ensuring the safe operation. The availability of performance coefficients for compressible flow is limited, and experimental testing can be cost prohibitive. The capability of using computational fluid dynamics is a test to determine its viability for determining performance coefficients. The flow field, resultant force, and aerodynamic torque on a symmetric disk Butterfly Valve are studied computationally at disk positions 45 deg and 70 deg over a range of operating pressures. The range of pressure ratios was chosen to include subsonic and supersonic flow states. The flow fields were predicted using the k-epsilon renormalization group theory (RNG) turbulence model. The computational results were obtained using CFX 10 and were performed on an SGl ALTIX 330. The flow field is illustrated using velocity contours colored by a Mach number, and the effects of the disk position and pressure ratio are illustrated using disk pressure profiles. The computational predictions for the aerodynamic torque coefficients are compared to test data at both 45 deg and 70 deg. A simplistic model used to predict the resultant force acting on the disk is compared against the computational results to obtain a better understanding of the resultant force trend throughout the stroke. The numerical results were generally in good agreement with test data, although a few disparities existed.
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a cfd study of the flow field resultant force and aerodynamic torque on a symmetric disc Butterfly Valve in a compressible fluid
ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering, 2006Co-Authors: Zachary Leutwyler, Charles DaltonAbstract:The flow field, resultant force, and aerodynamic torque on a Butterfly Valve with a symmetric disc are studied computationally at disc positions 45° and 70° over a range of operating pressure ratios that include subsonic and supersonic flow states. The aerodynamic torque coefficients were predicted using a k-e RNG turbulence model and were compared to test data at both 45° and 70° over a range of operating pressure ratios. The numerical results were generally in good agreement with test data, although a few disparities existed. The computational results were obtained using Fluent 6.0 and were performed on a Dell Precision workstation with dual Xeon processors.© 2006 ASME
