吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (6): 1981-1986.doi: 10.13229/j.cnki.jdxbgxb201606030
葛长江1, 叶辉1, 胡兴军1, 于征磊2
GE Chang-jiang1, YE Hui1, HU Xing-jun1, YU Zheng-lei2
摘要: 基于鸮翼的仿生翼型可用于揭示鸮翼的噪声产生机理。通过大涡模拟给出仿生翼型的流场,从中发现由前缘分离引起的两个声源分别为再附着的湍流边界层和从气泡中分离出来的涡脱落。由此可知,低雷诺数下的鸮翼宽频噪声是由湍流边界层散射导致的。之后,将被动多孔技术用于仿生翼型的后缘,在静压场中证实了多孔后缘缓解瞬态压力变化的作用。相关的噪声频谱也表明,多孔后缘具有高达10 dB以上的降噪潜力,但是降噪的幅度依赖于流阻率。
中图分类号:
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