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V形槽喷管在分开式排气系统中的降噪实验

何敬玉 邵万仁 许影博 李晓东

何敬玉, 邵万仁, 许影博, 李晓东. V形槽喷管在分开式排气系统中的降噪实验[J]. 航空动力学报, 2015, 30(2): 324-330. doi: 10.13224/j.cnki.jasp.2015.02.009
引用本文: 何敬玉, 邵万仁, 许影博, 李晓东. V形槽喷管在分开式排气系统中的降噪实验[J]. 航空动力学报, 2015, 30(2): 324-330. doi: 10.13224/j.cnki.jasp.2015.02.009
HE Jing-yu, SHAO Wan-ren, XU Ying-bo, LI Xiao-dong. Experiment of noise reduction in separate flow system using chevron nozzles[J]. Journal of Aerospace Power, 2015, 30(2): 324-330. doi: 10.13224/j.cnki.jasp.2015.02.009
Citation: HE Jing-yu, SHAO Wan-ren, XU Ying-bo, LI Xiao-dong. Experiment of noise reduction in separate flow system using chevron nozzles[J]. Journal of Aerospace Power, 2015, 30(2): 324-330. doi: 10.13224/j.cnki.jasp.2015.02.009

V形槽喷管在分开式排气系统中的降噪实验

doi: 10.13224/j.cnki.jasp.2015.02.009
基金项目: 

国家重点基础研究发展计划(2012CB720202)

详细信息
    作者简介:

    何敬玉(1985-),男,山东济宁人,博士生,主要从事航空发动机排气系统噪声研究.

  • 中图分类号: V231.1

Experiment of noise reduction in separate flow system using chevron nozzles

  • 摘要: 利用位于全消声室中的喷流噪声实验台研究了V形槽喷管在分开式排气系统中的降噪特性,比较了在剪切速度比为0.92工况下V形槽喷管的结构参数以及分布方式在冷喷流中对降噪效果的影响.结果表明:V形槽喷管降低了低频段的喷流噪声并增大高频段的喷流噪声;在喷管的下游方向有最好的低频段降噪效果,并具有最小的高频段喷流噪声增加量;增大V形槽喷管切入角可以增加低频段的降噪量,其降噪量最高为5dB;仅在外涵添加V形槽喷管可以增大低频段的降噪量并抑制高频段的喷流噪声的增加;V形槽喷管齿数的变化对降噪效果有一定的影响,但其影响远小于切入角的变化对降噪效果的影响;另外V形槽喷管可以显著地降低喷管下游方向的声压级大小.

     

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出版历程
  • 收稿日期:  2013-11-17
  • 刊出日期:  2015-02-28

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