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高Re数下变截面正八边形结构绕流特性试验研究

DOI: 10.11990/jheu.201408050

Keywords: 正八边形结构, 风洞试验, Re数, 平均压力系数, 气动力系数, 气动力矩系数, 绕流特性

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Abstract:

为得到雷达天线罩的绕流特性以开展结构设计,采用风洞试验方法研究了2.224 2×106≤Re≤ 8.896 9×106范围内变截面正八边形结构表面压力系数周向分布及其随Re数、倾角和风向角的变化规律,以及Re数对结构的气动力和气动力矩系数的影响.试验结果表明:周向平均压力系数变化较大,且受风向角的影响较为明显,在一定范围内Re数和倾角仅对边界层分离区域压力分布产生作用,而升力系数与阻力系数、升阻比、侧力系数以及气动力矩系数受Re数影响较大,且与风向角的相关性较为显著.

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