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为综合研究复杂地形、复杂气象等多种因素共同作用下深圳机场附近低空风场的分布形式,文章基于流体力学位势流理论提出了一种低空三维风场工程仿真方法。该方法利用变形后的半球体模拟山体,在此基础上引入圆球绕流模型结合线性变换技术来考虑风场中的过山气流;采用涡环模型考虑复杂气象条件产生的下击暴流;利用经验公式方法描述烟气流对风场的影响。文章以深圳机场实际情况为例,对机场附近的低空三维风场进行了数值建模与计算分析。分析结果表明,该方法可较好地显示出地形作用下风场速度的大小和方向的变化规律,兼顾下击暴流、烟气流的影响。该模拟方法简单合理、便于工程应用,可用于飞行模拟器以及飞机飞行动力特性评估。
In order to comprehensively study the distribution of low-altitude wind fields near Shenzhen Airport under the combined action of complex topography and complex meteorological factors, a low-altitude three-dimensional wind farm simulation method is proposed based on fluid potential flow theory. The method uses the deformed hemisphere to simulate the mountain. On the basis of this method, a round flow model incorporating the linear transformation technique is introduced to consider the over-mountain airflow in the wind field. The vortex ring model is used to consider the downburst caused by the complicated weather conditions. Empirical formula method to describe the impact of flue gas flow on the wind field. Taking the actual situation of Shenzhen Airport as an example, the article numerically models and calculates the low-dimensional three-dimensional wind field around the airport. The analysis results show that this method can well show the variation of wind speed and direction under the action of terrain, taking into account the impact of downburst and flue gas flow. The simulation method is simple and reasonable, and is convenient for engineering applications. It can be used in flight simulator and aircraft flight dynamics assessment.