| 摘要: |
| 在精密的电子元器件环境试验测试中，环境试验箱内的温度场均匀性、波动度等对测试效果的好坏至关重要。为了研究开发出高性能的环境试验箱，本文首先根据不同送、回风口型式（箱体构造）对速度场和温度场的影响，对箱体内结构进行了优化设计，在顺时针和逆时针箱体结构的基础上拓展了不同的结构型式；并对这些不同结构型式的箱体进行了模拟仿算，包括不同的送风口型式、角度和不同的回风口型式结构；对比仿真结果后，对圆形回风几何中心结构的箱体进行了实验验证。研究结果表明：七种不同的箱体结构模型中，0°倾角顺时针、几何中心位置逆时针以及多出风口模型三种模型的温度平均值和温度标准偏差都非常接近；实验和仿真数据在温度场均匀性标准偏差方面仍然存在一定的差距，所有测点平均温度为-71.55℃，温度误差为-1.55℃，最大温度偏差为1.8℃，但数据去中心化后，温度场各测点的温度具有相似的分布趋势。 |
| 关键词: 环境试验箱 温度场 箱体结构设计 均匀性 |
| DOI： |
| 投稿时间：2020-03-16 修订日期：2020-08-27
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| 基金项目:南京工程学院校级科研基金项目(YKJ201911)资助。 |
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| CFD Simulation and Experimental Study on Temperature Field Uniformity in Environmental Test Chamber |
| Yang Dongfang,Zhou Mo,Hu Bin,Zhou Xian |
| (School of Energy and Power Engineering, Nanjing Institute of Technology;Gongqin Environment Technology Co.,Ltd.;Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University) |
| Abstract: |
| In the environmental test of precision electronic components, the uniformity and fluctuation of temperature field in the environmental test chamber are very important to the test result. To develop an environmental test chamber with high performance, sevarel chamber structure models were proposed first from the view point of temperature field and velocity field on the basis of traditional clockwise and counterclockwise box structures. Then, the temperature field with different air flow patterns were simulated, in which different angle, position and velocity of supply air are included and considered. Finally, the simulation results were verified based on a test chamber prototype with return air in the center. The results showed that the average temperature and temperature standard deviation were similar for the three cases: 0°angle of supply air with clockwise structure, return air at the center position with counterclockwise structure, and multiple outlets. There was still a gap between the experimental and simulation data regarding the standard deviation of temperature uniformity. The average temperature and temperature standard deviation of all measuring points was ?71.55 ℃ and ?1.55 ℃. The maximum temperature deviation of all measuring points was 1.8 ℃. However, after the data were decentralized, the temperature at each point had a similar distribution. |
| Key words: environmental test chamber temperature field structural design uniformity |
