...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Fluid Flow >Self-sustained oscillation and cavitation characteristics of a jet in a Helmholtz resonator
【24h】

Self-sustained oscillation and cavitation characteristics of a jet in a Helmholtz resonator

机译：亥姆霍兹共振器中射流的自持振荡和空化特性

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

Self-sustained oscillations resulting from a sudden expansion in geometry, as encountered in cavities, occur in a broad array of engineering applications. In the present study, the turbulent flow past a 120 degrees-impinging edge Helmholtz nozzle was investigated. A modified theoretical model accompanied by numerical simulation was proposed to obtain the range of the oscillation frequency and was verified using experimental results. It was found that the cavitation clouds in the chamber dominate the oscillating frequency under the low pressure-high flowrate condition. Based on the simulation results, the details of cavitation development, the motion of vortex structures, and the fluid injection and reinjection were investigated in one typical cycle. The interaction between the cavitation and the vortex formation was analyzed with the vortex transport equation. The dilatation term, which is related to the mass transfer rate through the linkage of velocity divergence, has a high value only around the bulk flow; while the baroclinic torque is predominant due to the unremitting collapse and coalescence of the cavitation clouds.
机译：如在腔体中遇到的那样，由于几何形状的突然膨胀而导致的自持振荡在各种工程应用中都会发生。在本研究中，对经过120度撞击边缘的亥姆霍兹喷嘴的湍流进行了研究。提出了一种改进的理论模型，并辅以数值模拟，以求得振荡频率的范围，并用实验结果进行了验证。发现在低压-高流量条件下，腔室内的空化云占主导地位。根据模拟结果，以一个典型的周期研究了空化发展，旋涡结构的运动以及流体注入和再注入的细节。用旋涡传输方程分析了空化和旋涡形成之间的相互作用。膨胀项通过速度发散的联系与传质速率有关，仅在整体流动附近具有较高的值。而斜压扭矩则主要是由于空化云层的不间断塌陷和聚结所致。

著录项

  • 来源
    《International Journal of Heat and Fluid Flow》 |2017年第12期|158-172|共15页
  • 作者

    Liu Wenchuan; Kang Yong; Zhang Mingxing; Wang Xiaochuan; Li Deng;

  • 作者单位

    Wuhan Univ, Key Lab Hydraul Machinery Transients, Minist Educ, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Hubei Key Lab Water Jet Theory & New Technol, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Key Lab Hydraul Machinery Transients, Minist Educ, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Hubei Key Lab Water Jet Theory & New Technol, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China;

    China Shipbldg Ind Corp, Shanghai Marine Equipment Res Inst, Shanghai 200030, Peoples R China;

    Wuhan Univ, Key Lab Hydraul Machinery Transients, Minist Educ, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Hubei Key Lab Water Jet Theory & New Technol, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Key Lab Hydraul Machinery Transients, Minist Educ, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Hubei Key Lab Water Jet Theory & New Technol, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Self-sustained oscillation; Fluidic networks; Vortex-cavitation interaction;

    机译：自持振荡;流体网络;涡流相互作用;

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