室内空气流动过程的模型实验研究

Experimental investigation of indoor air flows in a model room

为了分析在不同的进风位置、射流方向以及进风温度条件下,房间壁温对室内空气流动的影响,在缩小模型实验的基础上,利用流动可视化和定量测量相结合的办法测量了不同工况下室内的空气流动形态、速度以及模型整体换热情况。结果表明:壁温恒定时,进风温度的降低引起水平进风方式的自由射流区缩短;垂直进风方式下射流形成的涡的中心位置向壁面靠近;中间垂直进风方式下射流向左侧偏转;右侧垂直进风方式下射流向右侧壁面偏转;同时浮升力引起的自然对流作用增强,换热温差加大,提高了围护结构漏热量。

Experiments were cnnducted in a sub-scale model room to analyze the influence of wall temperatures on the indoor air flow for different diffuser locations, air jet directions and temperatures. Indoor air flow patterns, velocities and a model of the overall heat transfer rates were obtained for various work conditions using fluid visualizations and quantitative measurements. The resohs show that the length of the horizontal air temperature decreases and that jet is reduced as the intake air when the eddies caused by the vertical air jet are closer to the wall, the heat transfer is increased by the enhanced natural convection from the lifting force. The air jet is defected to the left for vertical ventilation jets in the center and to the right for jets on the right with lower intake air temperatures.