论文部分内容阅读
基于Realizable κ-ε湍流模型对直升机飞行过程中雷达天线的非定常气动特性进行了CFD数值模拟分析,并对全尺寸和缩比雷达天线进行了不同雷诺数下的绕流计算,得到了雷达天线的非定常流场分布和气动载荷,通过处理得到了雷达天线脱落涡的频率和对应的斯脱拉哈数St。计算结果与风洞试验结果进行了比较分析,给出了基本分析结论。
Based on the Realizable κ-ε turbulence model, the unsteady aerodynamic characteristics of the radar antenna during helicopter flight were analyzed by CFD numerical simulation. The flow around the full-size and down-ratio radar antennas under different Reynolds numbers was calculated. The radar antenna The unsteady flow field distribution and aerodynamic load are obtained. The frequency of the shedding vortex of the radar antenna and the corresponding Strathalak number are obtained by the processing. The calculated results are compared with the wind tunnel test results, and the basic analysis conclusions are given.