鱼骨式热沉调温系统的数值模拟与试验研究

Numerical simulation and experimental research of fishbone heat sink temperature adjusting system

为了降低空间环境模拟设备的投资成本,从数值模拟与试验研究两个方面研究鱼骨式热沉在-130—+150℃可调范围内的温度均匀性。数值计算中,对热沉管及翅片整体结构进行了结构化网格划分,得到瞬态温度场随时间的变化及稳态时热沉不同控制点温度分布结果。研究结果发现,高温调温时,热沉温度均匀性均数值计算与试验结果相差1.176 K,低温调温时,热沉温度均匀性均相差1.408 K;热沉升降温速率在初始阶段,数值计算与试验结果相差3.53 K/min、3.04 K/min,升降温速率均满足≥1.0℃/min的指标要求;数值模拟结果与试验表现出了很好的一致性。

In order to reduce the investment cost of the space environment simulation equipment,the temperature uniformity of the fishbone heat sink in the adjustable range of-130—+150℃is studied from the two aspects of numerical simulation and experimental research.In the numerical calculation,the overall structure of the heat sink tube and fins were divided into structured grids to obtain the variation of the transient temperature field with time and the temperature distribution at different control points of the heat sink in the steady state.The results of the study show that the heat sink temperature uniformity difference between the numerical calculation and the test results is 1.176 K when the temperature is adjusted at high temperature,and 1.408 K when the temperature is adjusted at low temperature.In the initial stage,the difference in temperature rise and drop rates of the heat sink between the numerical calculation and the test results are 3.53 K/min and 3.04K/min respectively.Both the temperature rise and fall rates meet the index requirement of≥1.0℃/min.The numerical simulation results are in good agreement with the test results.