涡轮叶片辐照晶体测温安装方式建模及仿真

Modeling and Simulation of Installation Mode of Irradiated Crystal Temperature Measurement for Turbine Blade

针对辐照晶体传感器测量复杂工况条件下涡轮叶片表面温度时的安装问题,仿真分析了晶体温度传感器在涡轮叶片上的2种安装方式。选取航空发动机涡轮叶片吸力面的缘板处、叶片尾缘处和气膜孔背面3个位置,模化辐照晶体传感器在涡轮叶片工况下的安装条件,采用表面粘贴和开槽封胶2种安装方式建模,导入ANSYS Workbench进行流-固耦合有限元仿真,分析高温胶和辐照晶体在复杂工况下的应力、变形和温度等特性。结果表明,表面粘贴式安装的晶体传感器温度更高,但高温胶和晶体传感器所受应力远大于开槽封胶式安装所受应力,由此可知表面粘贴式安装的测温精度更高,但其牢固性不如开槽封胶式安装。研究结果可为采用辐照晶体测量航空发动机涡轮叶片温度的试验测试提供基础支撑。

In order to solve the installation problem of irradiated crystal sensor to measure turbine blade surface temperature under complex working conditions,two installation modes of crystal temperature sensor on turbine blades are simulated and analyzed.Three positions of suction surface of engine turbine blades,trailing edge of blade and back of gas film hole are selected.The installation conditions of irradiated crystal sensor under tur-bine blade condition are simulated.Two mounting methods,surface paste and slotted adhesive,are adopted for modeling,which are imported into ANSYS Workbench for fluid-solid coupling finite element simulation analy-sis.The stress,deformation and temperature characteristics of high temperature glue and irradiated crystal un-der complex working conditions are analyzed.The results show that the temperature of the crystal sensor is higher in the surface adhesive installation,but the high temperature adhesive and the stress of the crystal sensor are much higher than that of the slotted adhesive installation.Therefore,it is considered that the temperature measurement accuracy of the surface adhesive installation is higher,but its reliability is not as high as that of the slotted adhesive installation.The research results can provide a basic support for the experimental measure-ment of aero-engine turbine blade temperature using irradiated crystals.