变截面风扇管道快速声散射计算  

Aeroacoustic scattering via the fast scattering method

作　　者：王同庆[1] 张莉爽[1] 杨兵[2] 杨明绥[3] 

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]中国科学院工程热物理研究所,北京100190 [3]中国航空工业集团公司沈阳发动机设计研究所,沈阳110015

出　　处：《航空动力学报》2011年第7期1569-1574,共6页Journal of Aerospace Power

摘　　要：针对航空发动机消声短舱声学设计的需要,发展了一种结合快速声散射和直接边界元计算发动机远场声散射的方法,用于计算包含了壁面声阻抗影响的复杂截面管道声散射问题.应用该方法针对某风扇实验台进行了管道消声的数值模拟,得到了远场声散射结果,进行了声衬声阻抗影响的计算,并通过与文献结果的对比表明该方法具有工程应用价值.The fast scattering method was developed in this paper, which could be used for predicting the acoustic propagation problems in the varying cross-section ducts with the acoustic liners. The method can handle the complex section relatively easily by using the direct boundary element method. The noise reduction of a real fan with the duct liners was predicted. The influence of the liner impedance and the sound scattering from the moving body was investigated by comparing the results with those given in the literature. The results illustrate that the present method can be used for the design of the duct liner in the engineerlng.

关 键 词：发动机短舱 变截面管 直接边界元方法 声衬 快速声散射 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]