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预测消声器声学性能的时域非结构有限体积法

DOI: 10.3969/j.issn.1006-7043.201104067

Keywords: 有限体积法, 传递损失, 消声器, 非结构化网格, 声学性能

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Abstract:

为了探讨时域有限体积方法(FVM)在消声器声学性能预测中的应用,采用交错非结构FVM求解线性声波动方程,并进行数值色散分析给出相应的稳定性判据,运用吸收边界条件改进时域脉冲法,并用于预测消声器的声学性能.利用该方法模拟外插管消声器传递损失,结果与商业软件SYSNOISE有限元计算结果、文献实验结果均吻合良好,证明该方法预测抗性消声器声学性能的准确性.分析2种出口管位置蒸汽消声器的声学性能,验证了该方法的正确性及对大网格数模型的良好适用性.

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