建筑物通风孔排出的废气稀释是由建筑物本身上方的气流模式产生的湍流扩散效应以及附近建筑物顺风携带的湍流造成的。在夜间风力较低的情况下，逆风建筑产生的大部分湍流可能会受到大气温度稳定性的影响。在这些条件下，绝对最小稀释发生，完全由自生建筑湍流引起。本研究通过比较不同迎风条件下的风洞模拟来检验迎风湍流的影响。结果表明，逆风建筑物携带的湍流使建筑物产生的湍流稀释度增加了2到10倍。单位:SICitation:Symposium，ASHRAE交易，1987年，第93卷，pt。田纳西州纳什维尔2号

The dilution of exhaust gases from building vents is caused by the dispersive effects of turbulence from flow patterns over the building itself and by turbulence that is carried downwind from nearby buildings. Under low wind nighttime conditions, much of the turbulence generated by upwind buildings may be damped by atmospheric temperature stability. Under these conditions, the absolute minimum dilution occurs, caused entirely by self-generated building turbulence. This study examines the effeqt of upwind turbulence by comparing wind tunnel simulations with varying upwind conditions. The results show that the turbulence carried from upwind buildings increases dilution from building-generated turbulence by factors of 2 to 10.Units: SI