• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Aerospace Sciences and Technologies >VORTEX-RESONANT SOUND INTERACTION IN A DUCT CONTAINING AN ORIFICE
【24h】

VORTEX-RESONANT SOUND INTERACTION IN A DUCT CONTAINING AN ORIFICE

机译：包含孔的管道中的涡共振声音相互作用

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper reports the results of a set of experiments involving the passage of flow through a constriction - a single orifice - located in the middle of a duct. Geometric variations during testing include the length of the duct, orifice size, and orifice thickness. Acoustic oscillations in the duct were measured by systematically varying the flow rate for each. combination of geometric variables. Hot wire measurements were performed, in the region downstream of the orifice, under select conditions. The results indicate the excitation of clearly audible, discrete sharp tones of high amplitude that abruptly shift frequencies as the flow rate is increased within a certain range. The excited frequencies are related to fairly high harmonics of the natural acoustic modes of the duct. Simultaneous measurements from the hot wire and the microphone show the same frequency. This suggests the prevalence of a "lock-on" type of phenomena as reported earlier with two orifices. The effect of increase in the orifice diameter is to decrease the range of frequencies when the sharp tones are heard. Some evidence is presented that suggests the critical role played by the thickness of the orifice in exciting these sharp tones.
机译：本文报告了一组实验的结果，这些实验涉及使流体通过位于导管中间的狭窄部分（单个孔口）。测试期间的几何变化包括导管的长度，孔口尺寸和孔口厚度。通过系统地改变每个管道的流速来测量管道中的声振动。几何变量的组合。在选定条件下，在孔口下游区域进行热线测量。结果表明激发了清晰可闻的高振幅离散尖锐音调，当流速在一定范围内增加时，该突变会突然改变频率。激发的频率与管道的自然声模的相当高的谐波有关。热线和麦克风的同时测量显示相同的频率。这表明较早报道的带有两个孔的“锁定”现象的流行。听到尖锐的音调时，增加孔口直径的作用是减小频率范围。提出了一些证据，表明孔的厚度在激发这些尖锐的音调中起着关键作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号