西南石油大学学报(自然科学版) ›› 2000, Vol. 22 ›› Issue (1): 1-4.DOI: 10.3863/j.issn.1000-2634.2000.01.001

• 油气理论研究 •    下一篇

它激剪切流动诱发振荡射流的研究

唐川林1 张凤华1 杨林1 廖荣庆2 熊继有2

  

  1. 1.重庆大学机械学院,重庆市 400044;2.西南石油学院
  • 收稿日期:1999-06-22 修回日期:1900-01-01 出版日期:2000-02-20 发布日期:2000-02-20
  • 通讯作者: 唐川林

STUDY OF OSCILLATING PULSED JET INDUCED BY EXTERNAL EXCITATION SHEAR FLOW

TANG Chuan-lin1 ZHANG Feng-hua1 YANG Lin1 et al
  

  1. Chongqing University
  • Received:1999-06-22 Revised:1900-01-01 Online:2000-02-20 Published:2000-02-20
  • Contact: TANG Chuan-lin

摘要: 摘要:论述了它激剪切流动诱发振荡射流的机理,分析了它激有效激励条件,并对它激振荡射流的轴心压力进行了测试和频谱分析,给出了压力信号的功率谱。实验表明这种射流振荡幅值高,频率宽广,冲蚀效果优于普通射流。

关键词: 剪切流动, 自激振动, 振荡, 射流, 实验室试验, 分析

Abstract: The oscillating mechanism of the jet induced by external excitation shear flow was described and the excitation condition was analyzed in this paper. Spectrum analysis was applied to investigate the pressure oscillations in the center of the jet which are measured in laboratory. It is shown experimentally that its oscillating amplitude is very large and the jet has broad frequen-
cy, Its erosive effect is superior to that of the ordinary jet.

Key words: shear flow, self-excited vibration, oscillations, fluidics, laboratory testing, analysis

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