预测消声器声学性能的时域非结构有限体积法  

Unstructured finite volume time domain method for prediction of a muffler's acoustic attenuation performance

作　　者：宣领宽[1] 张文平[1] 明平剑[1] 龚京风[1] 许万军[1] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2012年第2期185-191,共7页Journal of Harbin Engineering University

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCF100307)

摘　　要：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.In order to investigate the application of an unstructured finite volume time domain method in the prediction of acoustic attenuation characteristics of mufflers, a linear acoustic wave equation was solved using the finite volume method （FVM） on unstructured staggered-grids. Also, the stability condition was proposed based on dis-persion analysis. An improved time domain impulse method based on absorbing a boundary condition was applied to predict the acoustic attenuation characteristics of mufflers. The presented method was used to calculate the transmis- sion loss of an expansion chamber muffler with an extended inlet and outlet. Satisfactory agreement was achieved by the presented method, vibro-acoustic analysis software-SYSNOISE, and the experimental data, which demonstrates the accuracy of this method. The acoustic attenuation characteristics of the two types of complex steam mufflers were analyzed. Comparison with the SYSNOISE （FEM） results shows the ability of presented method on a large grid number.

关 键 词：有限体积法 传递损失 消声器 非结构化网格 声学性能 

分 类 号：O429[理学—声学] TB535[理学—物理]