Heat flux calculation method of modular quartz lamp based on ray tracing method

基于射线追踪法的模块石英灯热流计算方法

National Key Laboratory of Strength and Structural Integrity, Aircraft Strength Research Institute of China, Xi'an 710065, China

Received: 28 August 2024

Abstract

In order to solve the problem that the heat flow calculation time is so long of modular quartz lamp with reflective screen, a ray tracing method is proposed to calculate the radiant heat flow of modular quartz lamp. The energy beam is released randomly from the surface of the lamp tube, the light beam through the reflective is reflected and exerts on the target surface, and the accumulation of energy beam at each point gets the surface heat flow of the target surface. The surface heat flow is taken as the heat source boundary of the test piece for heat transfer analysis, the internal temperature distribution of the test piece is calculated, and the temperature prediction is realized of the modular quartz lamp. The heating test of typical test component is carried out for modular quartz lamp, and the heat flow and the temperature distribution of typical test components are calculated by ray tracing method and radiation heat transfer. The relative error between the test results and the calculated results is less than 10%, which verified that ray tracing method could realize the prediction of surface heat flow of the modular quartz lamp, and it can provide support for the design of heat intensity test.

摘要

针对带反射屏的模块石英灯热流计算时间较长问题, 采用射线追踪法计算模块石英灯辐射热流, 灯管表面随机释放出能量光束, 光束经过反射屏反射作用于目标面上, 每个点能量光束累积得到目标面表面热流。将表面热流作为试验件的热源边界进行传热分析, 计算出试验件内部温度分布, 实现了模块化石英灯加热器的温度预测。开展模块石英灯的典型件辐射加热试验, 通过射线追踪法和辐射传热计算典型试验件的热流和温度分布, 试验结果与计算结果的相对误差小于10%, 验证了射线追踪法可以实现模块石英灯加热的表面热流预测, 为热强度试验设计提供支撑。