高低温试验箱回风口布置优化分析

Optimization Analysis of Air Return Outlet Layout of High and Low Temperature Test Chamber

高低温试验箱回风口布置影响试验箱均匀性的重要因素,为了研究均匀性更好的高低温试验箱,通过数值模拟的方法,研究了3种不同回风口布置的试验箱结构设计方案(回风口位于右侧中间,顶部右侧,顶部中间)下试验箱内的温度场流场,通过分析截面温度云图,并计算温度,风速的不均匀系数。结果表明回风口位于顶部中间是最优方案。优化后方案与原方案相比温度不均匀系数提高了38.5%,风速不均匀系数提高了53.6%,整体最大温差降低了51.9%,高低温试验箱整体均匀性提高。

Important factors affecting the uniformity of high and low temperature test chambers due to the arrangement of air return outlets.In order to study the high and low temperature test chamber with better uniformity,the temperature field and flow field in the test chamber under three different structural design schemes of the test chamber with different air return outlets(the air return outlet is located in the middle of the right side,the right side of the top,and the middle of the top)are studied through numerical simulation.The non-uniformity coefficient of temperature and wind speed is calculated by analyzing the section temperature nephogram.The results show that the optimal scheme is that the air return outlet is located in the middle of the top.Compared with the original scheme,the temperature non-uniformity coefficient of the optimized scheme is increased by 38.5%,the wind speed non-uniformity coefficient is increased by 53.6%,and the overall maximum temperature difference is reduced by 51.9%.The overall uniformity of the high and low temperature test chamber is improved.