培养箱内部热流场的数值模拟及开关门过程的影响

Research on numerical simulation of flow and temperature field and impact of door opening and closing process in incubator

基于CFD软件Fluent,对某种新型二氧化碳培养箱及其工艺参数,建立气体流动、传热的数学模型。对其内部的流动、传热进行非稳态数值模拟,并对开关门过程的影响进行分析。结果表明:培养箱打开外门5s内,外界空气对箱内温度影响不大;打开玻璃门25s内,外界空气对箱内温度影响区域顺序分别为从门框附近到箱体内部,从箱内下部到上部,从开门位置的左壁面到已开启的外门一侧的右壁面附近区域;关闭外门后,箱内靠近背壁面以及右壁面附近区域温度的恢复效果较好,靠近门附近区域的温度较难恢复。

According to CFD （Fluent）, a gas flow and heat transfer mathematical model was adopted for the certain process parameters of a new carbon dioxide incubator. The unsteady numerical simulation of its internal flow, heat transfer in the doorway was done. The impact of opening and closing door was discussed. The results showed that ; （1） The effect of outside air on the internal temperature after opening the outer door for 5s＇ period of time has been small; （2） The affected areas of the temperature in the incubator are from the doorway to the interior, from the downside to the upside, from the left wall on the side of the opening position to the right wall on the side of the open door in 25s; period of opening door; （3） After closing the outer door, the temperature of the areas near the back wall and the right wall make a good recovery, the temperature of a certain region near the door is more difficult to restore.