计算物理 ›› 1996, Vol. 13 ›› Issue (1): 1-6.
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季振林1, 张志华2, 马强2
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Ji Zhenlin1, Zhang Zhihua2, Ma Qiang2
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摘要： 从流体力学的基本方程出发,导出了等截面管内具有平均流和线性温度梯度时的三维声传播方程,然后采用迭代法将其化成可用边界积分方程表示的形式,最后用边界元法求解。由边界元法计算消声器的四极参数,从而可预测传递损失等声学特性。文中计算了膨胀腔的传递损失,并与一维理论结果进行了比较.
关键词: 声传播, 平均流, 温度梯度, 边界元法
Abstract: The governing equation of three-dimensional sound propagation in an uniform duct with mean flow and linear temperataure gradient is derived,based on the foundamental equations of aerodynamics.By using the interation method,the sound propagation equation is expressed as the case which can be computed numerically with the boundary element method.The four-pole parametes of a muffler can be obtained using BEM,therefore the acoustic per.formance such as transmission loss can be predicted.The transmission loss of an expansion chamber has been calculated and compared with the result obtained by means of the one-dimensional theory.
Key words: Sound propagation, Mean flow, Temperature gradient, Boundary element method
中图分类号:
O422
季振林, 张志华, 马强. 管道及消声器声学特性的边界元法计算[J]. 计算物理, 1996, 13(1): 1-6.
Ji Zhenlin, Zhang Zhihua, Ma Qiang. APPLICATIONS OF THE ROUNDARY ELEMENT METHOD FOR CALCULATING ACOUSTIC PERFORMANCE OF DUCTS AND MUFFLERS[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 1996, 13(1): 1-6.
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