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原文:
Acoustic analysis of elliptical muffler chamber having a perforated pipe
Evidently, a perforated pipe is an essential component in muffler systems. It has the ability to reduce the power levels of noise sources generated by flow. Muffler systems are composed of several elements joined together in series or parallel. In practical approach, each element can have one or more perforated pipe installed. This yields the ability to estimate the acoustic characteristic by the product of the individual element four-pole parameters.
In this work, a method to derive the four-pole parameters of such element with consideration of higher-order mode is presented. Based on the results obtained, the parameter C was investigated systematically. Some comparisons between the experimental measurements and the predicted results are discussed. The mean flow velocity is not considered in this paper.
翻译:多排孔椭圆腔消声器的声学分析
显然一个多孔管是消声器系统中不可缺少的一环。它可以降低由于流动产生的噪声功率等级。整个消声器系统是由几种消声器的单元串联或并联连接在一起。在实际应用中,每个单元可以包含安装一个或多个多孔管。最后效果可以根据独立单元的四极参数的结果来判断声学的特征。
在该工作中,可以通过结合高阶模型的方法获得一个单元的四极参数。基于获得的结果,系统的研究了参数C。对实验结果和预测结果进行了比较讨论。在本论文中不考虑平均流速。 |
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