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扩张室压力脉动衰减器声传播的有效性

杨帆 邓斌

杨帆, 邓斌. 扩张室压力脉动衰减器声传播的有效性[J]. 西南交通大学学报, 2020, 55(5): 1117-1123. doi: 10.3969/j.issn.0258-2724.20180139
引用本文: 杨帆, 邓斌. 扩张室压力脉动衰减器声传播的有效性[J]. 西南交通大学学报, 2020, 55(5): 1117-1123. doi: 10.3969/j.issn.0258-2724.20180139
YANG Fan, DENG Bin. Effectiveness of Sound Propagation of Hydraulic Noise Suppressor with Expansion Chamber[J]. Journal of Southwest Jiaotong University, 2020, 55(5): 1117-1123. doi: 10.3969/j.issn.0258-2724.20180139
Citation: YANG Fan, DENG Bin. Effectiveness of Sound Propagation of Hydraulic Noise Suppressor with Expansion Chamber[J]. Journal of Southwest Jiaotong University, 2020, 55(5): 1117-1123. doi: 10.3969/j.issn.0258-2724.20180139

扩张室压力脉动衰减器声传播的有效性

doi: 10.3969/j.issn.0258-2724.20180139
详细信息
    作者简介:

    杨帆(1990—),男,博士研究生,研究方向为压力脉动衰减器声学理论与设计,E-mail:yyff90@foxmail.com

    通讯作者:

    邓斌(1964—),男,教授,研究方向为流体传动及控制,E-mail:D20020059@sina.com

  • 中图分类号: TH137

Effectiveness of Sound Propagation of Hydraulic Noise Suppressor with Expansion Chamber

  • 摘要: 为了研究平面波截止频带内,进、出口偏置型扩张室压力脉动衰减器结构参数对其一维解析法计算精度的影响,基于面积突变处高阶模态的耗散效应,对两类偏置型扩张室一维解析法的有效性进行了分析. 首先,截止频率范围内双调谐内插管扩张室一维解析法的计算结果与实验测量结果吻合良好,证明了该方法应用于液压脉动衰减器是可行的;其次,将广泛应用于气体消声系统的两类进、出口偏置型扩张室结构(结构1和结构2)引入液压系统,制成相应的压力脉动衰减器,并利用一维解析法和三维有限元法分别得到其理论计算值;最后,以扩张室腔室内部存在局部非平面波效应为背景,研究了内插管插入深度、偏心距以及偏转角对一维解析法有效性的影响. 研究结果表明:结构1、2偏心距为40 mm、偏转角180°时,进、出口内插管插入深度对5000 Hz频带内(截止频率5469 Hz)高频区域的传递损失影响较大;而当结构1、2的内插管插入深度选定时,偏心距以及偏转角对0~4000 Hz一维解析法计算精度的影响可忽略不计,而在4000~5000 Hz研究频带内,这种影响则不可忽略.

     

  • 图 1  双调谐内插管扩张室

    Figure 1.  Double-tuned extended-tube chamber

    图 2  DTETC试验装置

    Figure 2.  Experimental devices of DTETC

    图 3  压力脉动衰减器测试平台

    Figure 3.  Test rig of hydraulic suppressor

    图 4  DTETC的插入损失

    Figure 4.  Insertion loss of DTETC

    图 5  外插进、出口非同轴扩张室压力脉动衰减器

    Figure 5.  Hydraulic suppressor with non-coaxial expansion chamber of external inlet and outlet

    图 6  偏置型扩张室脉动衰减器传递损失对比

    Figure 6.  Transmission loss comparison of hydraulic suppressors with non-coaxial expansion chamber

    图 7  结构1传递损失对比

    Figure 7.  Comparison of theoretical TL for configuration 1

    图 8  结构2传递损失对比

    Figure 8.  Comparison of theoretical TL of configuration 2

    图 9  偏心距对传递损失的影响

    Figure 9.  Effects of eccentricity on TL

    图 10  偏转角对传递损失的影响

    Figure 10.  Effects of deflection angle on TL

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出版历程
  • 收稿日期:  2018-03-22
  • 修回日期:  2018-07-19
  • 网络出版日期:  2018-09-14
  • 刊出日期:  2020-10-01

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