摘要
本文以地板送风模型为研究对象,采用PSI-C自定义函数,以模型划分网格为计算单元,数值分析了室内颗粒浓度分布规律,对PSI-C法的适用特点进行了剖析。发现：对于气流受扰动较强的送风口涡旋区域,颗粒浓度远大于室内上部空间,对于热羽流充分发展的人体附近区域,颗粒浓度大于其他区域;在垂直上送风口的近地面区域以及气流速度与旋转强度较小的室内上部空间,PSI-C法计算结果与实验结果符合的较好;PSI-C法数值计算得到的颗粒浓度值受网格单元大小、颗粒壁面边界条件、气流流型等影响显著。
Under floor air supply model and PSI-C user defined function were adopted in this paper.The paper uses model grid as calculation cell,analyses the distribution law of indoor particle concentration,deeply parses applied characteristics of PSI-C.Found that： for vortex area of supply air grille which is strongly disturbed,particle concentration is much greater than the upper interior space,for the around area of human body where the thermal plume is fully developed,particle concentration is greater than other regions;for near-surface area in the vertical diffuser and indoor upper space where air speed and rotating intensity are small,PSI-C simulation results match well with the experimental results;particle concentration value obtained by PSI-C method is significantly affected by the grid cell size,particle wall boundary conditions and air flow pattern.
出处
《建筑热能通风空调》
2010年第3期44-47,30,共5页
Building Energy & Environment
