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通过风洞模拟实验研究复杂地形山体对流动和扩散的影响。实验以厂址为中心,应用 X 型热线探头探测了不同风向下的平均流和湍流结构。对山体尾流中最大平均速度扰动和湍流强度扰动的衰减规律以及山体尾流结构进行了分析。用示踪扩散实验法研究复杂地形污染物浓度分布和扩散特征。根据实验结果建立了估算复杂地形扩散参数的经验方法,并经其它厂址数据所验证。给出了一个估算复杂地形大气扩散的计算模式,该模式预测结果与现场实验数据相吻合。
Wind Tunnel Simulation Study on the Impact of Mountain Compartments on Flow and Diffusion. The experiment is centered on the site and the X-type hot-wire probe is used to detect the average flow and turbulent structure under different wind directions. The decay law of the maximum average velocity turbulence and turbulence intensity disturbance in mountain wake and the structure of mountain wake are analyzed. Tracer - diffusion experiment was used to study the pollutant concentration distribution and diffusion characteristics in complex terrain. Based on the experimental results, an empirical method for estimating diffusional parameters of complex terrain was established and verified by other site data. A computational model to estimate the atmospheric diffusivity of complex terrain is given. The model predictions agree well with the field experimental data.