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多孔介质对圆柱⁃翼型干涉噪声的影响

杨成浩 冯和英 彭叶辉 保女子

杨成浩,冯和英,彭叶辉,等.多孔介质对圆柱⁃翼型干涉噪声的影响[J].航空动力学报,2022,37(7):1528‑1538. doi: 10.13224/j.cnki.jasp.20210270
引用本文: 杨成浩,冯和英,彭叶辉,等.多孔介质对圆柱⁃翼型干涉噪声的影响[J].航空动力学报,2022,37(7):1528‑1538. doi: 10.13224/j.cnki.jasp.20210270
YANG Chenghao,FENG Heying,PENG Yehui,et al.Effects of porous media on rod⁃airfoil interaction noise[J].Journal of Aerospace Power,2022,37(7):1528‑1538. doi: 10.13224/j.cnki.jasp.20210270
Citation: YANG Chenghao,FENG Heying,PENG Yehui,et al.Effects of porous media on rod⁃airfoil interaction noise[J].Journal of Aerospace Power,2022,37(7):1528‑1538. doi: 10.13224/j.cnki.jasp.20210270

多孔介质对圆柱⁃翼型干涉噪声的影响

doi: 10.13224/j.cnki.jasp.20210270
基金项目: 

国家自然科学基金 51875194

湖南省自然科学基金 2020JJ4306

湖南省教育厅优秀青年基金 20B226

详细信息
    作者简介:

    杨成浩(1996-),男,硕士生,主要从事气动声学方面的研究。

    通讯作者:

    冯和英(1983-),女,副教授,博士,主要从事叶轮机械气动热力学方面的研究。E⁃mail:fengheying@hnust.edu.cn

  • 中图分类号: V231

Effects of porous media on rod⁃airfoil interaction noise

  • 摘要:

    采用LES(large eddy simulation)+FW⁃H(Ffowcs Williams⁃Hawkings)方程,研究了圆柱表面使用不同PPI(pore number per inch)和厚度的多孔介质对圆柱尾迹及圆柱⁃翼型干涉噪声的影响,探索了多孔介质的降噪规律和机理。结果表明:多孔介质能稳定圆柱表面的剪切层,抑制旋涡脱落,从而削弱尾迹对下游翼型的影响,圆柱单音噪声最大可降79 dB,翼型单音峰值降低13.22 dB,宽频噪声降低20 dB;多孔材料PPI的变化对降噪效果影响较小,而厚度是影响流场模态、降噪效果及气动性能的一个关键参数;多孔材料厚度合适时,圆柱⁃翼型流场形态为“剪切层模态”,可有效降低湍流干涉噪声;多孔材料厚度较小时,发现了一种流场形态,即“剪切层⁃尾迹模态”,导致翼型噪声增大;合适的多孔介质厚度不仅降噪效果显著,对圆柱⁃翼型的气动性能也有改善作用。

     

  • 图 1  计算域示意图

    Figure 1.  Sketch of computational domain

    图 2  圆柱⁃翼型网格

    Figure 2.  Grid of rod⁃airfoil configuration

    图 3  网格无关性验证

    Figure 3.  Grid independence verification

    图 4  P1处流向速度功率谱密度

    Figure 4.  Power spectral density of streamwise velocity at P1

    图 5  P2处流向速度功率谱密度

    Figure 5.  Power spectral density of streamwise velocity at P2

    图 6  声压级频谱

    Figure 6.  Sound pressure level spectrum

    图 8  圆柱驻点90º方向平均速度

    Figure 8.  Mean streamwise velocity at 90ºof cylinder stagnation point

    图 11  平均速度云图

    Figure 11.  Mean velocity contour

    图 12  展向涡量云图

    Figure 12.  Spanwise vorticity contour

    图 13  x/d=2.0处湍流强度分布

    Figure 13.  Turbulence intensity distribution at x/d=2.0

    图 14  湍动能云图

    Figure 14.  Turbulence kinetic energy contour

    图 15  Q准则涡核等值面(Q=1×106 s-2

    Figure 15.  Iso⁃surface of vortex structure based Q⁃criterion (Q=1×106 s-2

    表  1  多孔介质模型

    Table  1.   Porous media models

    模型ε圆柱直径/mmNPPIh/mm
    110
    20.9310105
    30.9310155
    40.9310205
    50.9310255
    60.9310202.5
    70.9310207.5
    80.935202.5
    下载: 导出CSV

    表  2  不同多孔厚度的圆柱⁃翼型气动特性比较

    Table  2.   Comparison of aerodynamic characteristics of rod⁃airfoil with different porous layer thicknesses

    模型C¯D,rodCD,rod'CL,rod'C¯D,airfoilCD,airfoil'CL,airfoil'
    10.980.090.52-0.0030.007 60.227
    40.790.002 70.001 8-0.025 70.005 50.147
    61.050.0610.09-0.025 90.018 30.244
    70.730.002 60.001 5-0.004 10.006 80.213
    80.360.001 20.001 9-0.0130.011 20.239
    下载: 导出CSV
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  • 收稿日期:  2021-05-31

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