汽车乘员舱空调制冷CFD瞬态分析

Transient CFD analysis on airconditioner cooling of automobile occupant cabin

为提高汽车乘员舱的热舒适性,缩短空调制冷系统的开发周期,降低开发成本,对某车型乘员舱空调制冷过程进行30 min的CFD瞬态计算.由管道流量分配和总压分布可知,各管道流量分配较均匀,总压分布合理,没有压力损失过大的区域.由气流速度分布和温度场随时间变化情况可知,空调开启15 min后乘员舱温度基本稳定不变,达到人体舒适温度,但舱内后排中间位置温度偏低.计算得到的舱内监控点温度曲线与试验所测温度曲线基本吻合,证明该数值仿真方案有效.

To improve the thermal comfort of automobile occupant cabin, shorten developing cycle of airconditioner cooling system, and reduce development costs, a transient CFD calculation on the process of aireonditioner cooling in 30 min is performed for an automobile occupant cabin. The pipe flow distribution and total pressure distribution indicate that the pipe flow distribution is uniform and the total pressure distribution is reasonable, that is, excessive pressure loss area does not exist. The air flow velocity distribution and the change of temperature field with time show that the temperature of automobile occupant cabin becomes stable and comfortable after airconditioner running for 15 min, but the temperature of the middle position of the back row seat is a little lower. The temperature curve of monitoring points in cabin gotten from calculation basically matchs the curve obtained by test, which proves that the numerical simulation is effective.