基于自然通风的既有游泳馆室内气流组织模拟分析

Simulation Analysis of Indoor Air Distribution in Existing Natatorium Based on Natural Ventilation

目的 分析既有游泳馆气流组织的影响因素,为改善室内自然通风状况、打造健康的室内空气环境提供设计参考。方法 以某游泳馆为例,采用Airpak软件对室内气流组织进行模拟分析,提出在自然通风下通过改变侧窗参数和增设天窗来改善室内空气的流速和走向。结果 通过模拟分析得出最佳参数:侧窗入射风角度为各150°、通风面积增加至12.42%、进出风口面积比为1∶2、进风口和相对出风口高位、相邻出风口低位、并增设2组面积各为5%的天窗,此时,坐席区最大风速由0.16 m/s提高到0.91 m/s,泳池区最大风速由0.22 m/s提高到0.47 m/s。结论 入射风与进风口形成一定角度可避免穿堂风;侧窗通风面积和进出风口面积比不宜过大或过小;侧窗进风口不宜设在较低位置;大空间建筑设置天窗可提高空间整体风速。

In order to provide design references for improving indoor natural ventilation and creating a healthy indoor air environment,the natural ventilation of existing swimming pools,the influencing factors of air flow distribution were analyzed in existing swimming pools.The swimming pool in Shenyang Jianzhu University campus taken as an example,various influencing factors of air distribution were simulated by Airpak software.The simulation results show that under the condition of the natural ventilation,indoor air flow rate and orientation can be improved by changing the parameters of side windows and adding skylights.The optimal parameters are a side window incident wind angle of 150°,an increase in opening area of 12.42%,a ratio of inlet and outlet areas of 1∶2,high positions of the inlet and relative outlet,low positions of adjacent outlet,and the addition of two sets of skylights with an area of 5%.With the optimal parameters,the maximum wind speed in the seating area increases from 0.16 m/s to 0.91 m/s,and the maximum wind speed in the swimming pool area increases from 0.22 m/s to 0.47 m/s.The cross ventilation can be avoided by a certain angle between incident wind and the air inlet;the ratio of side window area to the air inlet and outlet area should not be too large or too small;the side window air inlet should not be set at a lower position;overall wind speed of the space in large space buildings can be increased by installing skylights.