氢氧火箭发动机助推器结构分析及寿命预测  

Structural Analysis and Life Prediction of Thrust Chambers For Hydrogen-Oxygen Rocket Engines

作　　者：LIU Xiao LI Yongjiang WU Youliang ZHAO Shihong TIAN Yuan SUN Bing 

机构地区：[1]Beijing Aerospace Propulsion Institute,Beijing 100076 [2]School of Astronautics,Beihang University,Beijing 100191

出　　处：《Aerospace China》2023年第3期48-55,共8页中国航天（英文版）

摘　　要：After several trial runs,penetrating cracks appeared in the thrust chamber wall of a hydrogen-oxygen rocket engine,which will affect the service life and performance of the engine.It is necessary to reduce the wall heat flux by injection element mixture ratio biasing or propellant films to prolong the life of the liner wall.In this paper,the deformation of three types of inner walls was calculated under cyclic mechanical loading,and the stress-strain response and the fatigue life of the inner walls were compared.The results show that the bottom midpoint of the gas side channel,with the largest residual strain,is the most prone to failure.In addition,the adoption of injection element mixture ratio biasing or film cooling can greatly increase the life of the inner wall,and the improvement effect of the two measures is similar.

关 键 词：thrust chamber cracks heat transfer fatigue life 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]