涡轮叶片辐射热冲击疲劳试验应力温度场模拟仿真  

Numerical simulation for the stressed temperature field in the ground thermal radiation fatigue test for turbine blade

作　　者：王则力[1] 巨亚堂[1] 张凯[1] 武小峰 WANG Zeli;JU Yatang;ZHANG Kai;WU Xiaofeng(Beijing Institute of Structure and Environment Engineering,Beijing 100076,China)

机构地区：[1]北京强度环境研究所

出　　处：《航天器环境工程》2019年第4期307-312,共6页Spacecraft Environment Engineering

基　　金：国家自然科学基金青年科学基金项目(编号:11802033)

摘　　要：针对传统热冲击试验中大梯度热环境模拟难以实现的问题,采用虚拟试验技术,对基于石英灯辐射加热方式实现叶片热冲击疲劳特性试验的热环境进行模拟.以航空发动机涡轮叶片目标温度场分布为基准,模拟单纯石英灯辐射加热以及石英灯辐射结合内膜气流冷却这2种热环境状态.模拟结果表明:在辐射加热的同时引入内膜气流冷却后,模拟温度场与目标温度场分布更为接近,能够准确模拟涡轮叶片结构上沿厚度和叶弦方向的温度梯度以及结构内的热应力,从而保证热冲击疲劳试验方法的有效性.In this paper,the thermal fatigue test for the turbine blade under the thermal radiation of quartz lamps is simulated by the virtual test technique of the thermal environment.The standard temperature field is selected a target for the comparison between the results of the quartz lamp radiation heating with and without the air film cooling.It is shown that the temperature field under the second condition are much closer to the target data as compared to the temperature field obtained only by the quartz lamp radiation heating.A more accurate temperature field along the thickness direction and the chord of the blade guarantees the effective simulation of the thermal stress in the thermal fatigue test of the turbine blade.The above results of the virtual test simulation show that the combination of the quartz lamp radiation heating with the air film cooling is applicable in the fatigue test for the turbine blade.

关 键 词：涡轮叶片 热辐射 热疲劳 石英灯 气膜冷却 虚拟试验 

分 类 号：TK125[动力工程及工程热物理—工程热物理] TB115.2[动力工程及工程热物理—热能工程]