基于数值风洞的天线动态风载特性分析

摘要: 基于reynolds时均N-S方程,采用雷诺应力(reynolds stress equation model,rSM)湍流模型,对位于大气边界层中的平板天线表面风压进行了数值分析,分析了天线工作面风压的分布特性。系统研究了方位角、仰角变化对天线风载特性的影响规律,并与工业风洞试验结果进行比较。计算结果表明:大气边界层中天线动态风载特性的变化规律与工业风洞试验结果一致,但风剖面的不同使得两种方法得到的风力值并不相同;进一步研究了仰角变化对大气边界层中天线风载特性的影响规律。通过对天线风压和风载的数值计算,得到了转动过程中天线风载的变化规律。
- 天线 /
- 数值分析 /
- 湍流 /
- 风洞
Abstract: In this paper, the wind pressure on a phased array antenna in atmospheric boundary layer has beensimulated based on the reynolds-averaged N-S equations and reynolds stress equation model (rSM), and thecharacteristics of the wind pressure distribution has been analyzed. Based on the above-analyzed, the influence lawsof wind loads caused by wind direction and elevation angle are studied, and which is compared with the tested dataobtained via industrial wind-tunnel. The calculated results show that the change law of motional wind loads on theantenna in atmospheric boundary layer is in an agreement with the tested, but there are some differences of windloads on the antenna between the calculated with the tested via wind-tunnel for the differences power law of windprofile. Furthermore, the influence law of wind loads on the antenna in atmospheric boundary layer caused byelevation angle has been calculated. Through the computation for the wind pressure and wind loads on the antenna,the change law of wind loads during rotation is obtained. Therefore, the present results have a widespreaduniversality and important application value in engineereing.
- angle of attack /
- numerical analysis /
- phased array antennas /
- turbulence

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