摘要
利用老化箱对机械电子元件进行老化筛选,能有效提高产品的可靠性。老化箱内部温湿度场的均匀性决定了其整体性能,这对老化箱功能有至关重要的影响。为了提高老化箱的性能,基于流体力学原理,利用CFD(computational fluid dynamics,计算流体力学)仿真软件对老化箱简化模型进行仿真模拟,并根据仿真结果确定老化箱内部速度场与温度场的分布情况,以优选不同送风温度、送风速度和送风角度组合下的送风方案。仿真试验采用正交试验法,以送风温度、送风速度和送风角度为试验因素,以能量利用系数、温度不均匀系数和相对湿度不均匀系数为评价指标。通过对仿真试验结果进行极差和方差分析可知,送风角度对能量利用系数的影响最显著,送风温度对温度不均匀系数和相对湿度不均匀系数的影响最显著。针对3个评价指标,得到3种最优方案:送风温度为90℃、送风速度为10 m/s、送风角度为0°,送风温度为90℃、送风速度为12 m/s、送风角度为-10°,以及送风温度为90℃、送风速度为8 m/s、送风角度为0°。最后,开展了老化箱内部温湿度测量实验,并与仿真结果进行了对比。结果表明,仿真结果与实验结果的相对误差较小,均在合理范围内,验证了仿真试验的可靠性和有效性。研究以提高老化箱性能和能量利用率为导向,可为同类老化箱的设计及其送风参数的设置提供参考。
Using aging chamber to screen mechanical and electronic components can effectively improve the reliability of products.The uniformity of the temperature and humidity field inside the aging chamber determines its overall performance,which has a crucial impact on the functionality of the aging chamber.With the goal of enhancing the performance of the aging chamber,the simulation was conducted on the simplified model of aging chamber by using CFD(computational fluid dynamics)software based on the fluid dynamics principle.According to the simulation results,the distribution of velocity field and temperature field inside the aging chamber was determined to optimize the air supply scheme under the combination of different air supply temperature,air supply speed and air supply angle.The orthogonal test method was adopted in the simulation test,with air supply temperature,air supply speed and air supply angle as test factors,and energy utilization coefficient,temperature non-uniformity coefficient and relative humidity non-uniformity coefficient as evaluation indexes.Through range and variance analysis of simulation results,it could be seen that the influence of air supply angle on energy utilization coefficient was the most significant,and the influence of air supply temperature on temperature non-uniformity coefficient and relative humidity non-uniformity coefficient was the most significant.For the three evaluation indexes,three optimal schemes were obtained:air supply temperature of 90℃,air supply speed of 10 m/s,air supply angle of 0°,air supply temperature of 90℃,air supply speed of 12 m/s,air supply angle of-10°,and air supply temperature of 90℃,air supply speed of 8 m/s,air supply angle of 0°.Finally,the temperature and humidity measurement experiment inside the aging chamber was carried out and compared with the simulation results.The results showed that the relative errors between the simulation results and the experimental results were small and within a reasonable range,which verified the reliability and effectiveness of the simulation test.The research is oriented to improve the performance and energy utilization of aging chamber,which can provide reference for the design of similar aging chambers and the setting of air supply parameters.
作者
孙敏
卢丰源
赵宇轩
王青春
陈忠加
SUN Min;LU Fengyuan;ZHAO Yuxuan;WANG Qingchun;CHEN Zhongjia(School of Technology,Beijing Forestry University,Beijing 100083,China)
出处
《工程设计学报》
CSCD
北大核心
2024年第3期357-367,共11页
Chinese Journal of Engineering Design
基金
国家自然科学基金资助项目(51475255)。
关键词
计算流体力学
老化箱
送风参数
正交试验
不均匀系数
computational fluid dynamics
aging chamber
air supply parameter
orthogonal test
non-uniformity coefficient
作者简介
孙敏(1998-),女,湖南娄底人,硕士生,从事热力学仿真研究,E-mail:1061758591@qq.com,https://orcid.org/0009-0008-3094-6995;通信联系人:陈忠加(1981-),男,内蒙古乌海人,副教授,硕士生导师,博士,从事农业装备工程与技术研究,E-mail:chenzhongjia@bjfu.edu.cn。
