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通过采用三维数值仿真与风洞试验相结合的方法,对上海市打浦路隧道待建新风塔排出废气在不同大气环境条件及风塔结构尺寸下的扩散规律进行研究。首先,建立了风塔周围大气湍流与废气扩散的模型,利用相似原理,对风塔模型进行了风洞试验验证,表明风洞实验结果与数值仿真结果吻合较好。然后,根据上海市的气象条件和特点,确定相应的大气环境气象参数,并对不同大气条件下,该风塔在两种设计高度下废气(CO和NO2)的扩散进行了模拟研究,给出了污染物在不同工况下的扩散衰减情况。模拟结果可作为风塔选型的参考。
Through the combination of three-dimensional numerical simulation and wind tunnel test, the law of diffusion of exhaust gas from the new tower to be built in Dapu Road in Shanghai under different atmospheric conditions and structure dimensions of wind towers was studied. First, a model of atmospheric turbulence and gas diffusion around the wind tower was established. The wind tunnel test was carried out on the wind tower model using the similarity principle, which shows that the wind tunnel experiment results are in good agreement with the numerical simulation results. Then, according to the meteorological conditions and characteristics of Shanghai, the corresponding meteorological parameters of the atmospheric environment are determined, and the simulation of the diffusion of CO and NO2 under different atmospheric conditions is given. The pollutants in different conditions of the proliferation of attenuation. Simulation results can be used as a reference to the wind tower selection.