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半无限长引压管动态响应特性

徐龙超 王雄辉 刘云鹏 颜应文 龙珊珊

徐龙超, 王雄辉, 刘云鹏, 等. 半无限长引压管动态响应特性[J]. 航空动力学报, 2024, 39(8):20220579 doi: 10.13224/j.cnki.jasp.20220579
引用本文: 徐龙超, 王雄辉, 刘云鹏, 等. 半无限长引压管动态响应特性[J]. 航空动力学报, 2024, 39(8):20220579 doi: 10.13224/j.cnki.jasp.20220579
XU Longchao, WANG Xionghui, LIU Yunpeng, et al. Dynamic response characteristics of semi-infinite pressure tube[J]. Journal of Aerospace Power, 2024, 39(8):20220579 doi: 10.13224/j.cnki.jasp.20220579
Citation: XU Longchao, WANG Xionghui, LIU Yunpeng, et al. Dynamic response characteristics of semi-infinite pressure tube[J]. Journal of Aerospace Power, 2024, 39(8):20220579 doi: 10.13224/j.cnki.jasp.20220579

半无限长引压管动态响应特性

doi: 10.13224/j.cnki.jasp.20220579
基金项目: 国家科技重大专项(J2019-Ⅲ-0004-0047)
详细信息
    作者简介:

    徐龙超(1998-),男,硕士生,主要从事燃烧室燃烧技术相关研究。E-mail:3227028829@qq.com

    通讯作者:

    颜应文(1978-),男,教授,博士,主要从事航空发动机燃烧技术相关研究。E-mail:yanyw@nuaa.edu.cn

  • 中图分类号: V231.2

Dynamic response characteristics of semi-infinite pressure tube

  • 摘要:

    在燃烧不稳定试验中,通常通过半无限长引压管对振荡压力进行取样,采样到的振荡压力幅值有所衰减且相位存在延迟。采用管道声波传播理论分析、试验研究与数值模拟相结合的方法,研究了引压管直径及安装座结构等对半无限长引压管动态响应特性的影响规律,分析了引压管测量压力脉动的增益及相位差等参数。结果表明:当半无限长引压管的长度不足时将会引起响应曲线的末端反射振荡;减小引压管直径将会增加压力幅值衰减,此时可以适当缩短半无限长引压管长度;安装座结构将导致引压管的幅频特性及相频特性存在安装座反射振荡,安装座空腔体积越大则振荡越剧烈。此外,通过理论分析和数值模拟分析了安装座引起响应振荡的原因。研究内容可准确预测、修正引压管的测量偏差,对于燃气轮机燃烧室压力脉动的测量具有参考意义。

     

  • 图 1  引压管结构图

    Figure 1.  Structural diagram of pressure tube

    图 2  试验系统图

    Figure 2.  Experimental system

    图 3  采集系统

    1 power; 2 NI9269 acquisition card; 3 NI9215 acquisition card; 4 signal collection of pressure sensor; 5 Labview procedure; 6 power amplifier.

    Figure 3.  Experimental acquisition system

    图 4  安装座结构图

    Figure 4.  Mounting seat

    图 5  声学数值模拟模型

    Figure 5.  Acoustic numerical simulation model

    图 6  试验结果误差分析

    Figure 6.  Error analysis of experimental results

    图 7  工况1的试验结果

    Figure 7.  Experimental results of case 1

    图 8  工况4和工况5的试验结果

    Figure 8.  Experimental results of case 4 and case 5

    图 9  不同长度半无限长引压管的增益结果

    Figure 9.  Gain results of semi-infinite pressure tubes of different length

    图 10  管道中的声波反射

    Figure 10.  Acoustic reflection in tube

    图 11  旁支管路中的声波反射

    Figure 11.  Acoustic reflection in side tube

    图 12  不同声波反射的管道内声压幅值与相位分布

    Figure 12.  Acoustic pressure amplitude and phase of different tube acoustic reflections

    图 13  试验测量、理论计算与数值模拟的结果

    Figure 13.  Results of experimental measurement, theoretical calculation and numerical simulation

    图 14  内部空气域

    Figure 14.  Internal air

    图 15  不同空腔体积的声波反射系数

    Figure 15.  Effect of cavity volume on reflection coefficient

    图 16  不同空腔体积对增益的影响

    Figure 16.  Effect of cavity volume on gain

    图 17  不同空腔体积对相位差、对流时间的影响

    Figure 17.  Effect of cavity volume on phase difference and convective time

    图 18  不同长度半无限长引压管对增益的影响

    Figure 18.  Influence of length of the semi-infinite pressure tube on gain

    表  1  试验工况表

    Table  1.   Experiment conditions

    工况半无限长
    引压管长度/m
    安装座结构末端边界条件
    110小孔安装座开放
    210通孔安装座开放
    330小孔安装座开放
    430通孔安装座开放
    530小孔安装座封闭
    630通孔安装座封闭
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-08-09
  • 网络出版日期:  2023-10-25

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