| 掠过流作用下穿孔板的声阻抗 |
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| 引用本文： | 康钟绪,季振林,连小珉,郑四发.掠过流作用下穿孔板的声阻抗[J].声学学报,2011,36(1). |
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| 作者姓名： | 康钟绪 季振林 连小珉 郑四发 |
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| 作者单位： | 1. 清华大学汽车安全与节能国家重点实验室,北京,100084
2. 哈尔滨工程大学动力与能源工程学院,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目(10474016) |
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| 摘 要： | 应用三维时域数值方法研究掠过流对穿孔板声阻抗的影响。建立了掠过流作用下穿孔板声阻抗计算的计算流体动力学(CFD)模型,通过时域计算得到掠过流作用下穿孔板的声阻抗,分析结构参数和掠过流马赫数对穿孔板声阻抗的影响。根据计算结果拟合掠过流作用下穿孔板声阻抗的近似表达式,利用获得的穿孔声阻抗新公式预测穿孔管消声器的传递损失,数值预测和实验结果吻合良好。计算结果表明,掠过流对穿孔板的声阻抗和穿孔管消声器的消声性能有明显影响。
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| 关 键 词： | 穿孔率 传递损失 马赫数 计算结果 消声器 计算模型 穿孔板厚度 声阻抗 掠过 实验结果 |
Acoustic impedance of perforated plate with grazing flow |
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| KANG Zhongxu,JI Zhenlin,LIAN Xiaomin,ZHENG Sifa.Acoustic impedance of perforated plate with grazing flow[J].Acta Acustica,2011,36(1). |
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| Authors: | KANG Zhongxu JI Zhenlin LIAN Xiaomin ZHENG Sifa |
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| Institution: | KANG Zhongxu~1 JI Zhenlin~2 LIAN Xiaomin~1 ZHENG Sifa~1 (1 State Key Laboratory of Automotive Safety and Energy,Tsinghua University Beijing 100084) (2 School of Power and Energy Engineering,Harbin Engineering University Harbin 150001) |
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| Abstract: | The three-dimensional time-domain approach is used to investigate the effect of grazing flow on the acoustic impedance of perforated plate.The CFD(Computational Fluid Dynamics) simulation model for the acoustic impedance of perforated plate with grazing flow is built and the perforation acoustic impedance is evaluated by the CFD computation in time domain.The effects of structural parameters and grazing flow on the perforation acoustic impedance are analyzed.Based on the numerical results,the curve-fitting ... |
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