地板送风终端单元空调房间速度场和温度场的数值模拟

Numerical simulation of velocity and temperature fields for an air conditioned room with underfloor air supply terminal units

建立了数值模拟模型,通过实验验证了该模型在等温送风情况下的适用性。对非等温送风不同风量下房间内的速度场和温度场进行了数值模拟,结果表明,出口风速主要影响送风口附近区域的速度场,而对整个空调房间影响不大,室内空气流速分布较均匀,基本维持在0·25m/s以下;出口风速对温度场的分布有很大影响,垂直平面温度梯度较大,水平平面温度分布均匀。为了保证地板送风的有效性和节能性,在满足风量的同时,必须严格控制出口风速,使射流高度在工作区域附近。

Develops a simulation model, experimentally validates its applicability under isothermal air supply. Numerically simulates the velocity and temperature fields in the room with non-isothermal air supply under different supply air rates. The results show that air outlet velocity mainly influences the velocity field in the area near the outlet and has insignificant influence on that of the whole room, and the velocity field is uniform which is below 0.25 m/s except the area near the outlet~ that the effect of air outlet velocity on the temperature field is significant and the vertical temperature gradient is large, but the horizontal temperature difference is small. To ensure the availability and energy efficiency of under-floor air distribution, the outlet velocity should be strictly controlled to make the jet near the working area while the air flow rate is enough.