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为了研究多联机性能测试室温度场的影响因素及解决其温度场不均匀性的问题,本文通过数值模拟和实验,研究了不同送风方式、不同送风速度和不同送风温度条件下测试室的温度场的温度变化情况。实验采用孔板顶送风、侧回风和四面风道送风、顶回风的送风形式;循环风机的转速设置30、40和50 Hz 3种;低温工况选取干球温度-20℃、,高温工况选取干球温度60℃,常温工况选取干球温度30℃。数值模拟结果与实验结果表明:相同送风温度和送风速度情况下,四面风道送风、顶回风的送风形式测试室温度场的均匀性较孔板顶送风、侧回风的送风方式温度均匀性差;相同送风方式和相同送风温度情况下,增大送风速度,相同位置处的温度随之降低,流场和温度场的分布趋势几乎不变;相同送风方式和相同送风速度情况下,送风温度越高,温度场越均匀。研究结果为多联机性能测试室的设计以及多联机性能的测试提供一定的理论和试验基础。
In order to study the influencing factors of the temperature field in the multi-line performance test chamber and to solve the problem of the nonuniformity of the temperature field, this paper studied the influence of different air supply modes, Temperature field of temperature changes. Experiments using orifice top air supply, side return air and air supply on both sides of the air duct, top return air supply form; circulation fan speed settings 30,40 and 50 Hz 3 kinds of low temperature conditions selected dry-bulb temperature -20 ℃ ,, select dry bulb temperature 60 ℃ under high temperature conditions, dry bulb temperature 30 ℃ under normal temperature conditions. The results of numerical simulation and experimental results show that the uniformity of the temperature field in the test chamber is better than that of the orifice plate in the form of air supply with four air ducts and air supply with top return air at the same supply air temperature and supply air speed The temperature uniformity of the air supply method is poor; under the same air supply method and the same air supply temperature, the air supply speed is increased, the temperature at the same position is decreased, and the distribution trend of the flow and temperature fields is almost unchanged; the same air supply method And the same supply air speed case, the air supply temperature is higher, the more uniform temperature field. The results provide some theoretical and experimental basis for the design of multi-line performance test room and the testing of multi-line performance.