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简要分析了下击暴流的基本特征,基于壁面射流原理,利用通用商业CFD(Computational fluid dynamics)软件FLUENT建立了三维稳态微下击暴流模型,通过改变模型参数,研究了下击暴流倾角对风速的影响,以及双下击暴流之间的相互作用,分析了不同情况下水平风速剖面和垂直风速剖面,仿真结果与文献中下击暴流的特征相符。在缺乏实测资料的情况下,利用FLUENT软件进行数值模拟将有助于更好的研究微下击暴流。
Based on the theory of wall jet, a three-dimensional steady-state microburst model was established by using commercial CFD (Computational fluid dynamics) software FLUENT. By changing the model parameters, the effects of dowstorm The influence of dip angle on the wind speed, and the interaction between the double bursts and the double bursts. The horizontal wind profile and the vertical wind profile under different conditions are analyzed. The simulation results are consistent with the characteristics of the downburst in the literature. In the absence of measured data, numerical simulations using FLUENT software will help to better study microstreaks.