Simulation Study On Installation Of Crystal Temperature Sensor For Typycal Structual Components

Crystal temperature measurement is a new technology to measure the external surface temperature of typical structural parts such as turbine blades of aeroengine and heat insulation tiles of aircraft under complex working conditions.Crystal temperature measurement is a temperature measurement method developed based on the temperature memory effect of crystal under irradiation and the property of radiation defect recovery at high temperature.Accurately measuring the temperature of typical structural parts under actual working conditions has an important supporting role in the design and life prediction of typical structural parts.This article conducts simulation research on the installation method of crystal temperature sensors on typical structural components,which can provide methods and technical support for the actual testing and installation of sensors.The main research work is as follows:(1)Simulation models of crystal sensor-turbine blade and crystal Sensor-insulation tile systems are established.The crystal sensor is installed vertically on the turbine blade and horizontally on the surface of the heat insulation tile.The installation mode is designed to be surface paste type and slotted sealing type.The solid domain and fluid domain are constructed step by step,and the details of the blade air film hole and internal cooling channel are improved.(2)The fluid-solid coupling analysis of crystal sensor-turbine blade model is completed.The installation conditions of the crystal sensor under complex turbine blade working conditions were modeled by selecting three installation locations at the edge plate of the suction surface of the turbine blade,the trailing edge of the blade and the back of the gas film hole,and the influence of high temperature and high pressure air impact was analyzed.The uniform and random distribution model of 100 crystal sensors on the blade body was established,and the stress,deformation and temperature changes of sealant and crystal sensors were analyzed.The results show that the accuracy of temperature measurement is higher with surface sticking installation.Although the slotted sealing adhesive installation has the phenomenon of stress concentration at the slot hole,its installation fastness is better.The results can provide the method support for the test of engine turbine blade temperature measurement by crystal sensor.(3)The fluid-heat-solid coupling simulation analysis of the crystal sensor-insulated tile system model is completed.The 15 crystal sensors are arranged on the upper surface and the middle gap of two adjacent heat insulation tiles,and the temperature,stress and overall deformation of the different positions of the sealant and crystal sensors are compared and analyzed.The simulation results show that the surface adhesive installation has higher precision of temperature measurement,but its fastness is not as good as that of the slotted sealing adhesive installation,and some suggestions are put forward for the installation of the crystal temperature sensor on the insulation tile.The research results can provide the method and technical support for the installation of the crystal temperature sensor on the outer surface of the aircraft.