Page 35 - 《振动工程学报》2025年第8期
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第 8 期 朱剑月,等: 串列海豹胡须柱杆件周围流场与气动噪声特性分析 1675
件周围流场与气动噪声特性,并与串列圆柱和串列
椭圆柱杆件进行对比,声学风洞测试结果验证了数
值模拟的准确性。结果表明:海豹胡须柱鞍面与节
点面交错排列的几何结构引发流体三维分离,流动
结构中存在相邻两鞍面部位的反向涡脱落,在一定
程度上平衡了整个海豹胡须柱杆件所受的横向力,
显著降低了杆件升力脉动和涡激振动,有效抑制了
几何体表面非定常脉动力产生的气动噪声;串列海
豹胡须柱破坏了串列圆柱尾流规律性涡脱落运动的
形成,抑制了谐频峰值,在多数频段内声压级幅值得
到了降低,且上游海豹胡须柱的降噪效果较明显,因
此串列海豹胡须柱可应用于工程领域中类圆柱杆件
气动噪声的控制。
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图 18 远场测点声压级频谱 (风洞试验)
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