Effects of Rising Angle on Upstream Blades and Intermediate Turbine Duct

作     者：LIU Jun WANG Pei DU Qiang LIU Guang ZHU Junqiang 

作者机构：Institute of Engineering ThermophysicsChinese Academy of Sciences 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2016年第25卷第4期

页      面：293-301页

核心收录：

学科分类：1004[医学-公共卫生与预防医学(可授医学、理学学位)] 082502[工学-航空宇航推进理论与工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0825[工学-航空宇航科学与技术] 100402[医学-劳动卫生与环境卫生学] 0702[理学-物理学] 10[医学] 

基　　金：support from the National Natural Science Foundation of China(No.51406204) 

主　　题：旋流叶片 上游 升角 航空发动机 涡轮转子叶片 设计变更 制造技术 低压涡轮 

摘      要：With the improvement of requirement,design and manufacture technology,aero-engines for the future are characterized by further reduction in fuel consumption,cost,but increment in propulsion efficiency,which leads to ultra-high bypass *** intermediate turbine duct(ITD),which connects the high pressure turbine(HPT) with the low pressure turbine(LPT),has a critical impact on the overall performances of such future ***,it becomes more and more urgent to master the design technique of aggressive,even super-aggressive *** the last years,a lot of research works about the flow mechanism in the diffuser ducts were carried *** achievements were reported,but further investigation should be *** the aid of numerical method,this paper focuses on the change of performance and flow field of ITD,as well as nearby turbines,brought by rising angle(RA).Eight ITDs with the same area ratio and length,but different RAs ranges from 8 degrees to 45 degrees,are *** to the investigation,flow field,especially outlet Ma of swirl blade is influenced by RA under potential effect,which is advisable for designers to modify HPT rotor blades after changing *** addition to that,low velocity area moves towards upstream until the first bend as RA increases,while pressure loss distribution at S2 stream surface shows that hub boundary layer is more sensitive to RA,and casing layer keeps almost *** the other hand,the overall total pressure loss could keep nearly equivalent among different RA cases,which implies the importance of optimization.