This paper first introduces the basic principles of displacement ventilation,and then assumed within a room,by replacing the ventilation openings placed at different positions within the room rate and temperature field numerical simulation in order to ventilation openings the room to optimize the location selected for reasonable.%本文先介绍了置换通风的基本原理，然后假定在某个房间内，通过置换通风口摆放的位置不同对房间内速度场和温度场进行数值模拟，从而对房间内通风口位置选择进行合理优化。
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