A validated CFD model is employed to predict the airflow behavior in an impinging jet ventilation (IJV) room with cool, isothermal or warm jets. By using the numerical results, the influences of jet discharge height, supply grille shape and room height on the jet flow behavior as well as the draught discomfort are analyzed for IJV operating in heating scenarios. The results indicate that the warm supply jet of IJV rises upward to the ceiling after spreading along the floor for a certain distance due to thermal buoyancy, resulting in a limited dispersion area, while the cool and isothermal jets of IJV always spread along the whole floor. When IJV is used for space heating, the lower the jet discharge height, the farther the supply air spreads along the floor, and the supply grille shape and room height almost have no effect on the air dispersion area. The results also show that the energy-efficient advantage of IJV in its heating mode compared to the mixing ventilation (MV) system is more remarkable in higher rooms. Moreover, there is a risk of draught discomfort in IJV heating rooms and it is recommended to wear socks to avoid this discomfort.

使用经过验证的CFD模型来预测冷，等温或热射流在冲击射流通风（IJV）室中的气流行为。通过使用数值结果，分析了在加热情况下IJV运行时，射流排放高度，进气格栅形状和房间高度对射流行为以及吃水不适感的影响。结果表明，由于热浮力，IJV的热能射流沿地板散布一定距离后向上上升到天花板，导致散布区域有限，而IJV的冷热等温射流始终沿整层散布。当使用IJV进行空间加热时，射流排放高度越低，送风沿地板的散布越远，进气格栅的形状和房间高度几乎不会影响空气扩散区域。结果还表明，在较高的房间中，与混合通风（MV）系统相比，IJV在其加热模式下的节能优势更为明显。此外，在IJV加热室中有通风不畅的风险，建议穿袜子以避免这种不适。