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A three-dimensional CFD computation method of the 4-pole matrix for complex chamber
Author(s): 
Pages: 298-302
Year: Issue:  2
Journal: Journal of Vibration Engineering

Keyword:  计算流体动力学消声量传递矩阵空滤器流场;
Abstract: 应用基于三维计算流体动力学(CFD)的时域方法计算了某复杂腔体四极子矩阵的两种形式:散射矩阵和传递矩阵;根据这两种矩阵和管道末端声学边界分别计算了该腔体的消声量.与实验测量结果对比,验证CFD法的有效性,并分析了两种四极子矩阵的特点,发现传递矩阵计算值更加准确,而且其计算方法更加简单快捷.进一步计算了存在与声波传播方向相反的平均流时该腔体的传递矩阵,得到有流条件下的消声量,分析了平均流对腔体消声量的影响.结果显示有流条件下,腔体消声量有所增加,且其频谱曲线向低频方向移动.
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