建筑体型廓线对建筑物表面粒子沉积特性的影响

摘要

选取典型建筑体型,利用计算流体力学方法研究了建筑体型对气溶胶粒子在建筑表面沉积速度和沉积通量的影响.结果表明:迎风面宽度是影响气溶胶粒子在建筑表面沉积速度和沉积通量的重要因素,且迎风面和背风面对其的影响规律不同;建筑表面上气溶胶粒子的沉积通量随着其粒径的变化而变化,且不同建筑表面最小沉积通量对应的粒径不同.%The influences of building configuration on the deposition velocity and deposition flux of aerosol particles on the building surface were investigated by using computational fluid dynamics for typical building configurations.The numerical results show that the width of windward side of a building is a key factor to influence deposition velocity and deposition flux.Deposition velocities and deposition fluxes of aerosol particles are different on windward and leeward sides of the building.Deposition fluxes of aerosol particles on the building surfaces vary with particle diameters.Particle diameters corresponding to minimum deposition flux are also different for different building surfaces.