Impact of Stagger Angle Nonuniformity on Turbine Aerodynamic Performance  

作　　者：Weihao Zhang Zhengping Zou Shangneng Pan Huoxing Liu Huoxing Liu Wei Li 

机构地区：[1]National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beihang University, Beijing 100191, China [2]Aeroengine Numerical Simulation Research Center, B eihang University, Beijing 100191, China [3]Chinese Aviation Powerplant Research Institute, Zhuzhou 412002, China

出　　处：《Journal of Thermal Science》2010年第5期465-472,共8页热科学学报（英文版）

基　　金：supported by National Nature Science Foundation of China under Grant Number 50776003;the Innovation Foundation of BUAA for PhD Graduates

摘　　要：The assembling error may lead to variation in stagger angles,which would affect the aerodynamic performance of the turbine.To investigate this underlying effect,two parallel numerical experiments on two turbines with the same profile,but uniform and nonuniform vane stagger angle respectively,were conducted in both steady and unsteady methods.The results indicate that certain changes in the detailed flow field of the turbine occur when the stagger angles are nonuniform,further,the blade loading distribution of the vane and rotor become markedly different from that in uniform vane stagger angle situation.Then these consequences caused by nonuniformity mentioned above enhance the unsteadiness of the flow,finally,the aerodynamic performance changes dramatically.It also shows that,compared with steady simulation,the unsteady numerical simulation is necessary in this investigation.

关 键 词：assembling error stagger angle nonuniformity TURBINE aerodynamic performance 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程] TD441[矿业工程—矿山机电]