大面积气动加热的石英灯阵模拟优化设计

针对结构热试验模拟的精细化需求,对大面积气动加热的石英灯阵模拟优化设计进行了研究。发展了石英灯阵辐射热流模拟程序,分析了采用传统单灯热流分布数据库插值叠加获得的石英灯阵热流分布的适用范围,基于遗传算法,发展了以灯阵中各灯功率为优化参数的石英灯阵热流模拟优化设计方法,并基于所建方法对某飞行器结构部件迎风面气动加热进行了灯阵模拟,获得了灯阵加热和气动加热条件下迎风面温度变化特性。结果表明,基于本文方法对石英灯阵中各灯功率进行优化设计,采用简单石英灯阵即可有效地模拟大面积非均匀气动加热,从而有效提高试验模拟精度,但前缘等位置的高热流区模拟精度有待进一步提高。

Optimization design of aerodynamic heating of large area simulated by quartz lamp array

The optimization design of simulation large area aerodynamic heating by quartz lamp array is studied to adjust the requirement of accurate simulation of structural thermal test.The simulation program for radiation heat flux of quartz lamp array is developed.The application range of the traditional method for obtaining the heat flux distribution of the quartz lamp array by interpolation and superposition of the single lamp heat flux distribution database is analyzed.Based on the genetic algorithm,the optimization design method for heat flux simulation of the quartz lamp array is developed by selecting the power of the single lamp in the lamp array as parameters to be optimized.The aerodynamic heating on the windward side of a structural component of a vehicle is simulated by the lamp array,and the temperature variation of the windward surface is obtained under the conditions of lamp array heating and aerodynamic heating.The results show that the simple quartz lamp array can effectively simulate large inhomogeneous aerodynamic heating with the lamp power of the quartz lamp array optimized by the method proposed,which can effectively improve the simulation precision of the structural thermal test,but the accuracy of simulation of the high heat flux at front position needs to be further improved.