大气边界层中天线风载特性的数值分析

基于Reynolds时均N-S方程和RSM湍流模型，以大气边界层中具体地貌的风速剖面为入口边界条件，对某一车载雷达天线的风载进行数值模拟，得到天线的阻力系数；并与目前天线设计采用的均一风速为边界条件的计算结果进行比较，研究了工作高度、风速、地貌等因素对大气边界层中天线风载特性的影响。计算结果表明，大气边界层中天线的阻力系数随工作高度及风速的增加而增大；而地面粗糙度对天线阻力系数的影响则由天线相对于标准参考高度的位置决定。

Numerical Analysis for Characteristics of Wind Loads on Antennas in Atmospheric Boundary Layer

Based on the Reynolds-averaged N-S equations and Reynolds stress equation model (RSM), the numerical simulation is performed on a vehicle-mounted radar antenna. In the simulation, the inlet boundary type is defined as velocity inlet with wind velocity section in specified exposure category. The drag coefficients of the antenna are obtained and compared with the results of computational models in which the boundary velocity is uniform velocity. The effects of working height and wind velocity on the antenna characteristics of antenna in atmospheric boundary layer are studied. The results show that the drag coefficients of antennas will be increased along with the working height and wind velocity, and the effect of the ground roughness to the drag coefficients is decided by the position relative to the normal height.