直升机雷达天线非定常气动特性数值模拟

The Emulational Calculation about the Radar's Unsteady Aerodynamic Characteristics in Helicopter

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。

This paper introduced the emulational calculation method about the radar’s unsteady aerodynamic characteristics in helicopter.It was based on the Realizable κ-ε turbulent flow model. It had calculated both of full size and reducible mode size radar’s unsteady areodynamic characteristics in different Reynolds number.It got the radar’s unsteady aerodynamic load and votex streets.Through compared the calculated result and the test result, it presented a basic conclusion.