Optimal location and shape definition of elliptical ventilation openings on aero engine turbine rotors with stress concentration effect  

作　　者：Haibing YU Tiefeng CHEN Yanjie QIU 

机构地区：[1]AECC Commercial Aircraft Engine Co.,LTD,Shanghai 200241,China

出　　处：《Chinese Journal of Aeronautics》2022年第1期388-397,共10页中国航空学报（英文版）

摘　　要：The aero engine turbine rotors are under strong centrifugal load and the highest thermal load.The ventilation openings on the rotors are inevitable,because air flow need to pass through them to cool the temperatures down and keep the air pressure balanced in internal aero engine.The ventilation openings will lead to stress concentration effect.In this paper,the stress concentration factor of elliptical opening on rotating disc is deduced by superposition method.How to define the optimal location and shape of the elliptical opening on rotating disc to decrease the stress concentration effect has been investigated specifically.The reliability and accuracy of the theoretical deviation process is verified by Finite Element Method(FEM).The process of how to obtain the optimal location of the elliptical ventilation opening with particular shape on turbine sealing disc is described as an engineering application case.The investigation provides sufficient theoretical support for optimal location and shape definition of elliptical ventilation opening on aero engine rotors with stress concentration effect by pure mechanics consideration.

关 键 词：Aero engine Elliptical ventilation opening Finite Element Method(FEM) ROTOR Stress concentration 

分 类 号：V231.9[航空宇航科学与技术—航空宇航推进理论与工程]