期刊文献+

液体射流泵空化噪声与振动试验 被引量:3

Experiment on cavitation noise and vibration in liquid jet pump
下载PDF
导出
摘要 针对液体射流泵的空化噪声与振动进行了试验研究;运用B&K加速度仪和水听器对射流泵各部位在不同工况下的空化噪声与振动进行了测量。结果表明:(1)射流泵空化噪声以单极子声源为主,随着流速和紊流度的增大,偶极子作用逐渐增大;(2)射流泵空化噪声与振动随空化程度加剧而更强烈,最强烈处也从喉管向扩散管转移;(3)射流泵面积比越小,达到临界空化前噪声频谱波动越强,临界空化之后噪声谱级趋于平稳,随频率增加而递减;(4)初生空化出现前后噪声在整个频域范围内都有一个较大的跃升,约5-10 dB,此跃升可作为判断初生空化的参考方法;(5)泵体3个正交方向振动并不相同,径向振动较轴向更为明显。 The experimental study on the noise and vibration in liquid jet pump was conducted. The B&K accelerometer and hydrophone were used for the measurement of the cavitation noise and vibration at different part of jet pump under different operating modes. The measured results reveal that: ( 1 ) The primary source of cavitation noise in jet pump is monopole source and the effect of dipole source increases with the augment of velocity and intensity of turbulence ; (2) With the development of cavitation, the intensity of noise and vibration increase and the most intensive place moves from throat tube to diffuser; (3) Before critical cavitation, the smaller the area ratio is, the stronger the fluctuation of noise spectrum is. In post critical cavitation stage, the noise spectrum degree decreases smoothly with the increase of frequency; (4) When incipient cavitation occurs, there is a sharp increase about 5 - 10 dB at the whole spectrum. This sharp increase can be adopted as an indicator of whether or not the incipient cavitation occurs ; (5) The vibrations in three orthogonal directions are in different modes. The vibration perpendicular to the axial direction overwhelms that to the axial direction.
作者 龙新平 王磊
出处 《排灌机械》 2007年第4期1-5,共5页 Drainage and Irrigation Machinery
基金 国家自然科学基金资助项目(50579060)
关键词 射流泵 空化噪声 振动 频谱分析 B&K加速度仪 jet pump cavitation noise vibration spectrum analysis B&K accelerometer
  • 相关文献

参考文献7

二级参考文献17

  • 1李福天.液态喷射泵吸上高度对其性能的影响[J].流体机械,1996,24(10):46-49. 被引量:2
  • 2Ross D.水下噪声原理[M].海洋出版社,1983..
  • 3汤渭霖.水下噪声学[M].哈尔滨:哈尔滨船舶工程学院,1984..
  • 4陆宏圻 尚宏琦.射流泵的汽蚀机理及计算理论[J].中国科学.A辑,(9).
  • 5胡湘韩 等.液态喷射泵汽蚀性能实验研究[J].水泵技术,1981,.
  • 6赵建福.掺气水流可压缩特性的研究[D].武汉:武汉水利电力大学,1998..
  • 7R G Cunningham, A G Hansen, and T Y Na. Jet pump cavitation. Trans A S M E, 92, Series D, 3 : 483 -494. 1970.
  • 8S T Bonnington. Jet pumps and ejectors, a state of the art review and bibliography. BHRA Fluid Engineering, 1972.
  • 9A A Kudirka and M A Decoster. Jet pump cavitation with ambient and high temperature water, J Fluids engineering,Mazeh 1979, Vol 101:93 -99.
  • 10Winoto SH, Shah DA, Te ESE. Limiting flow condition in water jet pump. Prec. XIX IAHB Sym on Hydraulic Machinery and Cavitation. 1998 ,Vol 1 : 852 -866, Singapore,Sep:09 - 11.

共引文献46

同被引文献18

引证文献3

二级引证文献43

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部