多门窗建筑风压驱动自然通风数值模拟

A Numerical Simulation of Wind-Driven Ventilation in Buildings with Multiple Windows and Doors

采用计算流体动力学方法对多门窗建筑风压通风过程进行数值模拟。首先,通过与经典实验结果进行校验计算,验证了计算流体动力学程序的可靠性;接着,对建筑贯流通风不同的开口工况进行了深入分析和计算,并探究室内空气流动的物理机制;最后,讨论并且分析速度矢量、速度大小、速度分量、压力分布、压力系数等结果,讨论入口风速对于建筑室内通风流场的影响。模拟结果发现,建筑贯流通风存在侧面通风口时,背风面的出风口也可能作为进风口。

A numerical simulation has been made of the wind-driven ventilation in buildings with multiple windows and doors by adopting the method of computational fluid dynamics. First, the reliability of the computational fluid dynamics program can be fully verified by checking the calculated results against the classical experimental results. Then, a depth analysis and ？nal calculation have been made of the different opening conditions of the cross ？ow ventilation, followed by a further study of the physical mechanism of the indoor air-flow. Finally, an analysis has been made of the results under discussion which mainly include the following factors： the velocity vector, velocity magnitude, velocity component, pressure distribution, and pressure coeffcient, followed by a tentative study on the infuence of incoming wind speed on the air flow field inside the building. The simulation results show that, when there is a side vent in the construction cross flow ventilation, the outlet of the leeward side may be used as an air intake.