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锯齿射流与圆射流流场和远场噪声特性的对比研究

冉令可 杨海华 张星辰 万振华 孙德军

冉令可, 杨海华, 张星辰, 万振华, 孙德军. 锯齿射流与圆射流流场和远场噪声特性的对比研究[J]. 应用数学和力学, 2016, 37(12): 1255-1271. doi: 10.21656/1000-0887.370507
引用本文: 冉令可, 杨海华, 张星辰, 万振华, 孙德军. 锯齿射流与圆射流流场和远场噪声特性的对比研究[J]. 应用数学和力学, 2016, 37(12): 1255-1271. doi: 10.21656/1000-0887.370507
RAN Ling-ke, YANG Hai-hua, ZHANG Xing-chen, WAN Zhen-hua, SUN De-jun. Investigation of Flow Development and Noise Generation of Free and Chevron Jets[J]. Applied Mathematics and Mechanics, 2016, 37(12): 1255-1271. doi: 10.21656/1000-0887.370507
Citation: RAN Ling-ke, YANG Hai-hua, ZHANG Xing-chen, WAN Zhen-hua, SUN De-jun. Investigation of Flow Development and Noise Generation of Free and Chevron Jets[J]. Applied Mathematics and Mechanics, 2016, 37(12): 1255-1271. doi: 10.21656/1000-0887.370507

锯齿射流与圆射流流场和远场噪声特性的对比研究

doi: 10.21656/1000-0887.370507
基金项目: 国家自然科学基金(11232011;11402262;11621202;11572314)
详细信息
    作者简介:

    万振华,E-mail: wanzh@ustc.edu.cn

  • 中图分类号: O358;O422.8

Investigation of Flow Development and Noise Generation of Free and Chevron Jets

Funds: Project supported by the National Natural Science Foundation of China(11232011;11402262;11621202;11572314)
  • 摘要: 采用大涡模拟研究了高亚音速、基于直径Reynolds(雷诺)数为Re=105的圆喷管构型射流和6齿喷管与4齿喷管构型的锯齿射流.将圆射流的计算结果与前人已有的实验和大涡模拟结果进行了对比,验证了当前计算结果的可靠性.对比研究了锯齿射流与圆射流特征,结果显示锯齿射流在近喷口附近具有更大的径向扩张率和更短的势核区长度;锯齿射流的总声压级在低辐射角度上相比于圆射流可低4dB, 而在侧边辐射方向噪声没有明显升高.分析了锯齿射流和圆射流远场压力脉动的前三阶周向Fourier(傅里叶)模态m=0,1,2,结果显示三组算例在同一周向模态上呈现出相似的声压级分布,然而4齿锯齿射流的第零阶和第一阶周向模态在高辐射角度上相较于圆射流具有更高的噪声水平.将POD分解技术用于提取特定周向模态上的最具能量的大尺度结构,在与大尺度结构相关的波包特征角度部分解释了锯齿射流和圆射流远场噪声特性的不同.
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出版历程
  • 收稿日期:  2016-11-06
  • 修回日期:  2016-11-29
  • 刊出日期:  2016-12-15

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