空气处理机对高大空间流动形态影响的研究

Influence of Air Handling Unit on Flow Field in Large Public Room with High Ceiling: A Simulation and Experimental Study

为研究空气处理机对高大空间空气流动的影响,采用CFD软件对处理机进行仿真。对空间内流动矢量进行研究,得到了空间内的流速和流向的分布状态;经过对空间内温度云图的研究,得到了空间内的温度分布情况;统计处理机在不同安装高度条件下各分层的温度,得到了处理机不同安装高度对空间温度分布的影响。

The flow fields of air in a large public-room with high ceiling (12m×15m×10m),processed by air handling unit (AHU)and possibly accommodating many people,were mathematically modeled,theoretically analyzed in fluid dynamics and thermodynamics,numerically simulated with CFD software and experimentally evaluated.The influence of the AHU height on the distributions of air velocity vector field and temperature field was investigated.The simulated results show that the AHU height,aligned along vertical symmetric axis,has a major impact. For example,as the height decreases from 8 to 6 m,the velocities and temperatures of the air (0-3m above ground)increase ,with their distributions satisfying well the requirements for heating,ventilation,cooling and energy-saving.The simulated and measured results were in good agreement.We suggest that the simulated results of some technological interest in AHU installation.