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连续式跨声速风洞流场湍流度测试实验研究

朱博 陈吉明 吴巍 裴海涛

朱博,陈吉明,吴巍,等. 连续式跨声速风洞流场湍流度测试实验研究[J]. 实验流体力学,2022,36(X):1-9 doi: 10.11729/syltlx20220034
引用本文: 朱博,陈吉明,吴巍,等. 连续式跨声速风洞流场湍流度测试实验研究[J]. 实验流体力学,2022,36(X):1-9 doi: 10.11729/syltlx20220034
ZHU B,CHEN J M,WU W,et al. Experimental investigation of turbulence intensity measurement in continuous transonic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2022,36(X):1-9. doi: 10.11729/syltlx20220034
Citation: ZHU B,CHEN J M,WU W,et al. Experimental investigation of turbulence intensity measurement in continuous transonic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2022,36(X):1-9. doi: 10.11729/syltlx20220034

连续式跨声速风洞流场湍流度测试实验研究

doi: 10.11729/syltlx20220034
详细信息
    作者简介:

    朱博:(1973—),男,广西百色人,硕士研究生,高级工程师。研究方向:风洞流场测试与分析技术,热线技术,测控技术。通信地址:四川省绵阳市二环路南段6号12信箱1分箱 (621000)。E-mail:bobjou@139.com

    通讯作者:

    E-mail:bobjou@139.com

  • 中图分类号: V211.7;O357.5

Experimental investigation of turbulence intensity measurement in continuous transonic wind tunnel

  • 摘要: 使用恒温式热线风速仪(CTA)完成了0.6m连续式跨声速风洞换热器入口至试验段流场湍流度测量;采用二维热线探头旋转方法,完成了换热器入口至稳定段出口的低速流场三维湍流度分布测试;采用一维探头连续变热线过热比方法,完成了试验段跨声速流场湍流度测试,测试流场速度最高马赫数为1.5。研究结果表明:换热器段和稳定段是重要的降湍部段,均可降低湍流度90%以上;稳定段阻尼网从3层增加至5层,可降低稳定段湍流度50%,可降低试验段湍流度17%;采用CTA连续变热线过热比方法可以获得试验段可压流场的扰动图(反映了试验段流场的扰动特征)和湍流度值,马赫数为0.4的流场扰动图呈一阶线性特征,马赫数为0.7的流场扰动图呈现双曲线特征。实验结果可为连续式跨声速风洞流场湍流度评估和优化提供依据。
  • 图  1  热线探头测点分布

    Figure  1.  Hot wire probes setting for measurement

    图  2  稳定段出口测点

    Figure  2.  Measuring point in the exit of setting chamber

    图  3  试验段测点

    Figure  3.  Measuring point in test section

    图  4  吹断的探头热丝

    Figure  4.  Hot wire of probe broken by flow

    图  5  换热器入口湍流度分布

    Figure  5.  Turbulence intensity distribution at the entrance of heat exchanger

    图  6  换热器出口湍流度分布

    Figure  6.  Turbulence intensity distribution in the exit of heat exchanger

    图  7  四拐入口湍流度分布

    Figure  7.  Turbulence intensity distribution in the entrance of the 4th corner

    图  8  稳定段入口湍流度分布

    Figure  8.  Turbulence intensity distribution at the entrance of setting chamber

    图  9  3层阻尼网稳定段出口湍流度分布

    Figure  9.  Turbulence intensity distribution at the exit of setting chamber with 3 screens

    图  10  三层阻尼网与五层阻尼网的稳定段出口湍流度比较

    Figure  10.  Comparison of setting chamber exit turbulence intensity between 3 screens and 5 screens

    图  11  风洞回路流向湍流度分布

    Figure  11.  Comparison of turbulence intensity between 3 screens and 5 screens

    图  12  Ma0.4三层阻尼网试验段流场扰动图

    Figure  12.  Ma0.4 flow fluctuation diagram in 3 screens test section

    图  13  Ma0.7三层阻尼网试验段流场扰动图

    Figure  13.  Ma0.7 flow fluctuation diagram in 3 screens test section

    图  14  Ma0.4三层阻尼网试验段热线脉动电压幅值谱

    Figure  14.  Ma0.4 frequency spectrum of hot wire voltage fluctuation amplitude in 3 screens test section

    图  15  Ma0.4五层阻尼网试验段流场扰动图

    Figure  15.  Ma0.4 flow fluctuation diagram in 5 screens test section

    图  16  Ma0.7五层阻尼网试验段流场扰动图

    Figure  16.  Ma0.7 flow fluctuation diagram in 5 screens test section

    图  17  三层阻尼网和五层阻尼网试验段流场湍流度比较

    Figure  17.  Turbulence level comparison between 3 screens and 5 screens in test section

    表  1  不同阻尼网层数试验段湍流度测量结果

    Table  1.   Turbulence level result for different screen layers in test section

    阻尼网马赫数湍流度
    <u>, %
    拟合优度不确定度/
    %
    三层0.40.0700.9870.0012
    三层0.70.0540.9810.0003
    五层0.40.0560.9820.0014
    五层0.70.0470.9690.0013
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-04-20
  • 修回日期:  2022-06-17
  • 录用日期:  2022-07-13
  • 网络出版日期:  2023-07-04

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