截球形天线罩风载荷数值模拟  

Numerical simulation on the wind load of truncated sphere radome

作　　者：贾峤[1] 吴正[1] 郭明旻[1] 王紫 翁雷 

机构地区：[1]复旦大学力学与工程科学系,上海200433 [2]上海之合玻璃钢有限公司,上海200023

出　　处：《水动力学研究与进展（A辑）》2012年第5期605-614,共10页Chinese Journal of Hydrodynamics

基　　金：国家科技部科技创新基金(1101H117700);上海市科委科技创新基金(pkc2011-004)~~

摘　　要：此文采用FLUENT软件下的数值模拟与模型实验相结合的方法,对截球型雷达天线罩在均匀定常来流下的风载荷情况进行了研究。在数值计算中,比较了三维不可压缩湍流的标准k、RNG k和Reynolds应力三种模型,结果表明标准k模型比较适合本问题的工程应用。使用标准k模型对不同高径比的天线罩进行数值模拟后发现,高径比的改变会显著改变其升、阻力特性,是影响天线罩整体风载荷的重要因素。The wind load of truncated sphere radome has been studied in the condition of uniform time-independent flow by the methods of both numerical simulation from the software FLUENT and a wind tunnel experiment of radome model.The numerical results using three different kinds of 3-D incompressible turbulence model,which are Standard Model,RNG Model and Reynolds Stress Equation Model,are compared with the experiment result.It is shown that the Standard Model is a much more suitable one to be applied to the industrial problem.When applying the Standard model to the numerical simulation,we found that the lift and drag characteristics of a radome may be changed dramatically with its height-to-diameter ratio which could be a key factor affecting wind load of a radome.

关 键 词：截球型天线罩 风载荷 模型实验 k模型 高径比 

分 类 号：O368[理学—流体力学]