Minimizing Secondary Flow Losses in a High Pressure Turbine with Nonaxisymmetric Endwall

摘要：

A novel nonaxisymmetric endwall contouring is presented to suppress corner separation and produce more uniform exit flow angle. Firstly, a design methodology of automated optimization based on aplanar cascade is put forward. Hereafter, with respect to the contoured endwall and the planar cascade, numerical simulation is adopted to understanding of the effects of endwall contouring. The results show that with nonaxisymmetric endwall, the corner separation is enormously suppressed because the interaction between the low momentum fluids from the endwall region and the suction side region no longer occurs. Furthermore, the total loss coefficient is decreased by 10％ in the 128％ C,x plane, and the flow turning angle becomes larger. All these show the effectiveness of nonaxisymmetric endwall in reducing secondary flow losses for a turbine cascade.

关键词： nonaxisymmetric endwall contouring corner separation secondary flow loss

作者: CHEN De-sheng LIU Bo

作者单位: School of Power and Energy, Northwestern Polytechnical University, Xian, China

会议类型: 国际会议

会议名称: 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)

会议地点: 西安

会议语种:英文

页码: 94-99

在线出版日期: 2012-09-10（万方平台首次上网日期，不代表论文的发表时间）