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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。
Aiming at the requirement of refinement of structural thermal test simulation, the simulation and optimization design of a large area of aerodynamic heating quartz lamp was studied. The simulation program of radiant heat flow of quartz lamp array was developed. The application range of the heat flux distribution of quartz lamp array obtained by the traditional single-lamp heat flow distribution database interpolation was analyzed. Based on the genetic algorithm, the quartz Based on the proposed method, the lamp array simulation was performed on the aerodynamic heating on the windward side of a structural part of an aircraft, and the temperature change characteristics of the windward surface under the heating of the lamp array and the aerodynamic heating were obtained. The results show that based on this method, the power of each lamp in the quartz lamp is optimally designed. The simple quartz lamp array can effectively simulate the large-area non-uniform aerodynamic heating, which can effectively improve the experimental simulation accuracy. However, Area simulation accuracy needs to be further improved.