| 考虑变截面影响的航空发动机短舱声学模型及数值结果 |
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| 引用本文： | 王晓宇,杜林,孙晓峰.考虑变截面影响的航空发动机短舱声学模型及数值结果[J].航空学报,2006,27(6):1073-1079. |
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| 作者姓名： | 王晓宇 杜林 孙晓峰 |
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| 作者单位： | 北京航空航天大学 407教研室, 北京 100083 |
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| 摘 要： | 针对航空发动机短舱声学设计的需要,发展一种快速计算方法——传递单元法(TEM),并与直接边界元方法相结合,计算发动机远场声辐射。TEM以等价分布源方法为基础,该方法的优势在于易于计算变截面管道内的声传播,同时,对管道内部声衬位置及长度没有任何限制。给出更接近于真实发动机形状的声辐射算例。
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| 关 键 词： | 直接边界元方法 传递单元法 发动机消声短舱 变截面管 声衬 |
| 文章编号： | 1000-6893(2006)06-1073-07 |
| 收稿时间： | 2005-06-07 |
| 修稿时间： | 2005年6月7日 |
A New Approach for the Acoustic Design of Aeroengine Nacelle with the Effect of Varying Cross-section Aera |
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| WANG Xiao-yu,DU Lin,SUN Xiao-feng.A New Approach for the Acoustic Design of Aeroengine Nacelle with the Effect of Varying Cross-section Aera[J].Acta Aeronautica et Astronautica Sinica,2006,27(6):1073-1079. |
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| Authors: | WANG Xiao-yu DU Lin SUN Xiao-feng |
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| Institution: | Fluid and Acoustic Engineering Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 10083, China |
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| Abstract: | This paper presents a transfer element method(TEM),which can be used to predict the sound prop- agation in a varying cross-section duct with acoustic liners.Compared with the existing work,such as Mode- Matching method and Boundary Integral method,this method does not need the eigenvalue calculation arising from a lined duct and at the sometime it has a capability of treating varying flow Mach number.Various nu- merical simulations show that the present results agree with the existing data very well at the same geometrical condition.Finally,this method is extended to calculate the sound propagation in a finite length duct,which al- so shows very interesting results. |
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| Keywords: | direct boundary element method transfer element method aircraft engine nacelle varying area duct liner |
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