天线风洞试验阻塞比的仿真计算与分析  

Simulation and Analysis of the Blockage Ratio for Antenna Wind Tunnel Test

作　　者：高延龙[1] 杜平安[1] 杜强[1] 

机构地区：[1]电子科技大学机械电子工程学院,成都610054

出　　处：《现代雷达》2010年第5期79-83,共5页Modern Radar

基　　金：军事预研基金资助项目

摘　　要：基于标准κ-ε湍流模型和不同进口风速,利用计算流体动力学方法分别对平板天线和抛物面天线进行风洞试验的仿真计算,分析了天线工作面及背风面的风载,在此基础上得出最佳的阻塞比范围,并对其成因进行了详细分析。计算结果表明:实体天线模型的截面积不应超过风洞试验段的4%。对于抛物面天线,只是它的阻力系数大于平板天线,但在阻力系数随阻塞比变化的趋势上是一样的。而且阻塞比对背风面载荷的影响比迎风面更为严重。The numerical simulation of a plane antenna and a circular aperture parabolic antenna wind tunnel test is performed using the software of FLUENT, based on standard κ-ε model and varied inlet velocities. The wind loads on the forward and back antenna are analyzed to gain a better zone of the blockage ratio, and then its forming reason is found. The simulation results show that cross-sectional area of the antenna model should be less than 4 percent of that of wind tunnel. The trend that the drag coefficient of the circular parabolic antenna follows the blockage ratios is similar to that of the plane antenna, just the former drag coefficient is higher than the latter one. The blockage ratio affects the leeward more seriously than the windward.

关 键 词：风洞 阻塞比 标准κ-ε湍流模型 风载荷 仿真 

分 类 号：TN823[电子电信—信息与通信工程] O351.2[理学—流体力学]