Application and Optimization of Non-Axisymmetric End Wall in a High Pressure Turbine
This paper presents a numerical study on the potential aerodynamic benefits of using nonaxisymmetric end walls in one high pressure (HP) turbine, in particular the stator row, and aims to find the global optimum for the design space that best satisfies the objectives of reducing secondary losses and results in the largest gain in aerodynamic performance. In order to achieve this aim, the optimization system of NUMECA is used to design the end-wall contour and to find the optimal end-wall geometries. And the process chain is applied to the stator hub end wall. Several optimization strategies involving different objective functions to be minimized and the corresponding performances are compared. The parameters considered within the optimization process are total pressure loss coefficient, secondary kinetic energy (SKE), inlet mass flow, Mach number and flow angle at the stator exit. The results predict that non-axisymmetric endwall profiling is a powerful tool for reducing secondary losses, in particular improving the overall efficiency and reducing the total pressure loss over the entire blade height.
turbine optimization non-axisymmetric end-wall profiling secondary flows
NA Zhen-zhe LIU Bo
School of Power and Energy, Northwestern Polytechnical University, Xian, China
国际会议
4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)
西安
英文
86-93
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）