摘要
论述了利用计算流体动力学数值计算方法得到天线风压的原理,采用基于Reynolds时均N-S方程和RNGk-ε湍流模型的数值研究方法对具有风洞实验结果的矩形平面天线的风压分布进行了数值模拟,分析了天线工作面风压的分布特性。在此基础上计算了不同风向角下天线阻力系数,并与风洞实验结果进行比较,进一步用数值计算方法研究了风速与风载间的关系。研究结果表明:数值计算结果和风洞实验结果比较吻合,风速或雷诺数变化对风载阻力系数无影响,数值计算方法可以在天线风载计算及周围风场分析研究中发挥重要作用。
In this paper, the principle of numerical computation of wind pressure on antenna is discussed and the numerical simulation of wind-induced pressure based on Reynolds-averaged N-S equations and RNG k-ε turbulent model has been performed on a rectangular planar antenna on which the drag coefficients are obtained by method of experiment. Moreover, the characteristics of wind pressure distribution on antenna and the flow characteristics around antennas are analyzed. On the basis of it, the drag coeffi- cients under different wind directions are calculated and compared with experimental data. Furthermore, the relation between wind velocities and wind loads has been studied by method of numerical simulation. The simulation results show that the computed results are in good agreement with the experimental data, and the change of wind velocity or Reynolds number have any effect on drag coefficients. So Computational Fluid Dynamics（CFD） technique can play an important role in the study of wind loads computation for antenna and analysis of fluid flow around antenna.
出处
《现代雷达》
CSCD
北大核心
2009年第3期77-80,共4页
Modern Radar
基金
"十一五"总装预研基金项目
关键词
天线
数值模拟
湍流模型
阻力
antenna
numerical simulation
turbulent model
drag force
