自然通风对学生宿舍室内苯污染影响的数值模拟

为降低健康风险，采用计算流体力学数值模拟方法，研究了4种不同通风工况对学生宿舍室内苯污染的影响，讨论了室内苯浓度、气流速度矢量与空气龄分布。结果表明：自然通风对于室内苯污染的去除效果明显，进出风口的位置与大小会影响室内气流分布，良好的气流组织更有利于室内污染物的及时排出；出风口对于室内污染物的排出影响较大，增大出风口的面积有利于苯的排出，能更加有效地降低室内苯污染；进风口对室内空气龄影响明显，增大进风口面积能有效提高室内空气的新鲜程度，有利于室内苯污染的稀释，提高学生宿舍室内空气品质。

Numerical Simulation of Natural Ventilation Effect on Benzene Pollution in Student Dormitory

In order to reduce the health risk,the effects of four different ventilation conditions on benzene pollution in dormitory were studied with numerical simulation of computational fluid dynamics,and the benzene concentration,air velocity vector and air age distribution were discussed.The results showed that natural ventilation has obvious removal effect on indoor benzene pollution,the location and size of air inlet and outlet affect indoor air distribution,and good air distribution was more conducive to timely removal of indoor pollutants.Air outlet had a greater impact on the removal of indoor pollutants,increasing the area of air outlet is conducive to benzene removal and more effective reduction of indoor benzene pollution.Increasing the area of air inlet can effectively improve the freshness of indoor air,which is conducive to the dilution of indoor benzene pollution and the improvement of indoor air quality in student dormitories.