送风高度对碰撞射流热风供暖房间热环境影响的实测研究
Experimental study on influence of supply air height on thermal environment in a heated room with impinging jet ventilation system
摘要：
在人工气候室内，对碰撞射流通风两种送风高度下的室内温度与气流速度进行了实测。结果表明：碰撞射流送风高度对室内温度竖直分布影响不大，但对紧贴地面的空气温度的衰减过程有明显影响；送风高度对室内气流分布有较大影响，增大送风高度可以减小地面附近气流的速度，但增大了离地面较远处的风速；由于送风高度较低时近风口处的空气温度较高，导致碰撞射流热风供暖时送风口越低，人体吹风感越小。
Abstract：
In an artificial climate chamber with impinging jet ventilation system,investigates the distributions of indoor air temperature and velocity with two heights of supply air. The results show that the height of supply air only affects the reduction of the air temperature close to the floor, while the influence on the vertical distribution of indoor temperature is negligible. The height of supply air has a great effect on the air distributions in the room. The air velocity is decreased near the floor and increased in the zone far away from the floor, when the height of supply air is increased. Due to the higher temperature near the inlet when the supply air height is low, the lower the height of supply air is, the lower the level of resultant draft sensation will be.
Keywords:impingingjetventilation,heating,thermalenvironment,heightofsupplyair,indoortemperature,airvelocity,draftsensation