| 赵加鹏,吴旌,聂晓敏.回转体边界层转捩区声辐射的预报方法研究[J].,2011,30(2):138-144 |
| 回转体边界层转捩区声辐射的预报方法研究 |
| Research on prediction methods for noise radiation from boundary layer transitions on revolution bodies |
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| 中文摘要: |
| 基于边界层理论和转捩区声辐射理论,利用Liepmann理论Krane偶极子声源改进模型,在研究回转体表面的压力梯度和声衍射损失对转捩区声辐射影响的基础上,改进了回转体边界层转捩区声辐射的预报方法。结果表明:与零压力梯度相比,逆压梯度下的转捩区将导致更高的噪声辐射,利用改进方法预报的噪声级与实验值的一致性较好。 |
| 英文摘要: |
| Based on boundary layer and radiated noise theories from boundary layer transition,using the Liepmann analogy model improved with Krane dipole sound source,the effects of pressure gradient and the loss of noise diffraction on transition noise were studied.A new prediction method for radiated noise from bodies of the revolution boundary layer transition is presented.The results show that transition in an adverse pressure gradient will result in higher noise radiation in comparison to the one in a zero pressure gradient.The prediction results of improved prediction method matched with the experimental values. |
| DOI：10.11684/j.issn.1000-310X.2011.02.009 |
| 中文关键词: 回转体 边界层转捩区 流噪声 偶极子 |
| 英文关键词: Bodies of revolution Boundary layer transition Flow noise Dipole |
| 基金项目: |
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