摘要
由钝体绕流产生的气动噪声可以通过控制流动来降低。为了降低在飞机起飞降落过程中的气动噪声,一种在物体表面覆盖软性多孔材料的新方法应运而生。为了证实这种方法的有效性,在北京航空航天大学D5气动声学风洞中,对不同直径圆柱表面覆盖软性多孔聚氨酯泡沫,进行了0.09~0.18Ma风速范围的气动声学测量实验。结果显示,通过在圆柱表面覆盖软性材料,可以降低由圆柱产生的气动噪声。通过对比实验结果,对不同直径圆柱软性多孔聚氨酯泡沫的降噪性质进行了分析。
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