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周期性凸起结构对圆柱绕流流场及声场影响分析

王俊娇 冯和英 仝帆 王勇

王俊娇, 冯和英, 仝帆, 王勇. 周期性凸起结构对圆柱绕流流场及声场影响分析[J]. 机械科学与技术, 2022, 41(8): 1306-1312. doi: 10.13433/j.cnki.1003-8728.20200450
引用本文: 王俊娇, 冯和英, 仝帆, 王勇. 周期性凸起结构对圆柱绕流流场及声场影响分析[J]. 机械科学与技术, 2022, 41(8): 1306-1312. doi: 10.13433/j.cnki.1003-8728.20200450
WANG Junjiao, FENG Heying, TONG Fan, WANG Yong. Effect of Periodic Convex Structure on Flow and Sound Fields of Circular Cylinder[J]. Mechanical Science and Technology for Aerospace Engineering, 2022, 41(8): 1306-1312. doi: 10.13433/j.cnki.1003-8728.20200450
Citation: WANG Junjiao, FENG Heying, TONG Fan, WANG Yong. Effect of Periodic Convex Structure on Flow and Sound Fields of Circular Cylinder[J]. Mechanical Science and Technology for Aerospace Engineering, 2022, 41(8): 1306-1312. doi: 10.13433/j.cnki.1003-8728.20200450

周期性凸起结构对圆柱绕流流场及声场影响分析

doi: 10.13433/j.cnki.1003-8728.20200450
基金项目: 

国家自然科学基金项目 51875194

国家自然科学基金项目 1160229

湖南省教育厅优秀青年基金项目 20B226

详细信息
    作者简介:

    王俊娇(1994-), 硕士研究生, 研究方向为气动噪声控制, hanW_tang@163.com

    通讯作者:

    冯和英, 副教授, 博士生导师, 博士, fengheying@hnust.edu.cn

  • 中图分类号: V211.3

Effect of Periodic Convex Structure on Flow and Sound Fields of Circular Cylinder

  • 摘要: 采用大涡模拟与声类比的方法研究了周期性凸起结构对圆柱绕流流场及声场的影响。以30 mm直径的圆柱为研究对象,设计的凸起结构周期为1/3直径,凸起结构展向厚度为1/10直径,同时设计了42 mm与48 mm两种不同直径的凸起结构。模拟雷诺数123 100下基准圆柱与两种带周期性凸起结构圆柱的流场与声场,详细分析了凸起结构对气动力系数的影响,同时分析了凸起结构对圆柱绕流涡脱落噪声的影响。研究发现,直径更大的凸起结构降低噪声的效果更显著,25 000 Hz以下的总声压级降低高达19 dB; 同时凸起结构也能够降低升力系数波动及阻力系数的均值。进一步研究表明,周期性凸起结构的降噪机理在于,周期性凸起结构破坏了圆柱绕流在展向上脱落涡的连续性。
  • 图  1  L10R48模型流向视图

    图  2  计算域及网格

    图  3  模拟与实验结果对比图

    图  4  3个模型整体升、阻力系数时程图

    图  5  基准圆柱与表面周期性凸起圆柱在30 mm直径处的截面升、阻力系数时程图

    图  6  基准圆柱与表面周期性凸起圆柱凸起部分截面升阻力系数时程图

    图  7  凸起结构降噪效果

    图  8  流向方向Q准则涡核等值面图(Q=1.18×106/s2)

    图  9  展向方向Q准则涡核等值面图(Q=1.18×106/s2)

    图  10  3个模型的总涡量分布

    图  11  3个模型展向涡量的分布

    表  1  网格无关性验证

    Sr CD(均值)
    网格1(213万) 0.171 0 1.391
    网格2(405万) 0.175 6 1.492
    网格3(620万) 0.176 5 1.458
    实验结果[17] 0.180 0 -
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-10-27
  • 刊出日期:  2022-08-25

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