冷热房间之间隔门通风性能的数值分析

应用数值模拟方法,对冷热房间之间隔门通风情况进行了分析。三维模拟区域主要运用稳态湍流和Boussinesq模型进行模拟,并着重对不同隔门高度和外部条件下流动换热情况作了对比研究。研究表明,两个墙壁间的温差及其引起的密度差是形成温度和速度分布的主要原因。隔门使两个房间之间形成对流,右侧高温房间下部有冷气流进入,而左侧低温房间有热气流由上方进入。当隔门高度降低时,零压差线的相对高度不断升高,对流效应减弱。

Natural Convection Between Two Differentially Heated Rooms

The air flow through doorway between two differentially heated rooms is investigated numerically using commercial CFD software.The problem considered was a 3D flow of an air as Boussinesq fluid, steady state turbulent model with thermal boundary conditions. Thesimulation results showed the velocity and temperature profiles at the door was mainly determined by the temperature difference of two wallsand associated density difference. The cold air was found to flow into the bottom of warmer room, the hot air was found to flow into the topof colder room. The zero pressure was found at a certain level of the door where the inside pressure and the outside pressure have equal value,and the ratio level of zero pressure will increase with the height of door reducing.