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螺旋桨非空泡噪声数值计算方法研究
Numeric simulation of non-cavatation propeller noise
张成, 张大海, 魏强
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作者单位:中国舰船研究设计中心, 湖北 武汉 430064
中文关键字:螺旋桨;非空泡噪声;声类比;指向性
英文关键字:properller; non-cavitation noise; acoustic analogy; directivity
中文摘要:通过合理的区域划分,分别建立螺旋桨流场计算域与声学计算域,通过大涡模拟求解螺旋桨流场压力信息。利用Light-Hill声类比理论对流场压力进行变换,得到螺旋桨旋转域的面声源与体声源,由此计算整个研究域的噪声分布情况,并对螺旋桨非空泡噪声的指向性进行分析。利用试验值对计算精度进行验证,计算值与试验值对比结果表明,计算方法对螺旋桨非空泡噪声具有较高的预报精度。
英文摘要:Non-cavitation noise of properller is numerically investigated. The main purpose is to analyze non-cavitation noise in various operating conditions with diferent congurations. The technology roadmap of this research as follow. The First step is establishment of flowing and acoustic model. The second step is caculating the flow field information. The third step is to get the properller information of stress tensor and velocity by ICFD software, get the time-domain acoustic information of the properller equi-acoustic source by Light-Hill theory, get the frequency information of properller equi-acoustic source by FFT. The fourth step is calculation the three-dimensional contour of the acoustic model and the frequency spectrum of different test field point. The last step is comparing the results of the calculation and model test.
2016,38(5): 21-25 收稿日期:2015-05-22
DOI:10.3404/j.issn.1672-7619.2016.05.005
分类号:U664.113
作者简介:张成(1987-),男,硕士研究生,工程师,研究方向振动冲击与噪声。
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