置换通风条件下污染物分布特性的模拟研究

为了研究置换通风房间内污染物的分布特性,采用标准k-ε湍流模型结合壁面函数法,利用Fluent软件对房间的速度场、温度场、TVOC浓度场进行模拟。针对有无冷却顶板的不同情况,得出室内温度场、速度场、TVOC浓度场的分布特性并进行了对比研究。研究结果表明冷却顶板可以降低置换通风系统的室内温度梯度,但也同时降低了置换通风系统的排污能力。

Simulation Study of Contamination Distribution Characteristics on the Conditions of Displacement Ventilation

In order to study the distribution of pollutants in the displacement ventilation room, the velocity field, temperature field and TVOC concentration field in the room are simulated by FLUENT software which use standard k-ε turbulence model combined with wall function method. Through comparing the different circumstances of whether having the cooling ceiling or not, we can get different distribution characteristics about the indoor temperature field, velocity field , TVOC concentration field and make a comparative study. The results show that the cooling ceiling not only can reduce the indoor temperature gradient of displacement ventilation system, but also reduce its sewage capacity.