An Experiment and Numerical Study of Flow and Heat transfer Characteristics of Turbine Blade

摘要：

　　The flow and heat transfer characteristics were investigated on the surface of a turbine blade using experimental and numerical methods.The measurements were conducted in a short-duration transonic heat transfer wind tunnel at different inlet Reynolds numbers(Rein)and exit isentropic Mach numbers(Mais)which are closed to the blades real working state.The surface heat transfer coefficient is derived from the surface temperatures measured by thermocouples based on one–dimensional and semi-infinite assumption.The results show that,Mais is the main factor affecting the pressure coefficient distribution,while the effect of Rein can be neglected.With larger Reynolds number,the surface heat transfer coefficients increase significantly and the transition point of the suction side moves upward.With the same Rein,the heat transfer is affected mainly by Mais at the suctions rear region; with Mais increasing,the local density flow is decreasing oppositely and as a result the heat transfer is weakened.The numerical results also show that the flow vortex structure in cascade passage which impacts on the suction surface near the endwall and has a strong influence on the heat transfer at this region.

关键词： short-duration wind tunnel Turbine blade surface pressure coefficient surface heat transfer Reynolds number Mach number

作者: Liu Cong Zhu Huiren Xu Runhong Fu Zhongyi Hui Liu

作者单位: School of Engine and Energy,Northwestern Polytechnical University,Xian,710072,P. R. China Avic Commercial Aircraft Engine Co.,LTD,Shanghai,200241,P. R. China

会议类型: 国际会议

会议名称: The 5th International Symposium on Jet Propulsion and Power Engineering(第五届喷气推进与动力工程国际会议)

会议地点: 北京

会议语种:英文

页码: 1-11

在线出版日期: 2014-09-15（万方平台首次上网日期，不代表论文的发表时间）