...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >PIV measurement of internal structure of diesel fuel spray
【24h】

PIV measurement of internal structure of diesel fuel spray

机译：柴油喷雾内部结构的PIV测量

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 particle image velocimetry (PIV) measurements of diesel fuel spray injected from a single-hole nozzle at injection pressures ranging from 30 to 70 MPa, which are comparable to partial-load operating conditions of commercial diesel engines. The fuel is injected into a non-combusting environment pressurized up to 2.0 MPa. A laser-induced fluorescent (LIF) technique is utilized to visualize internal structures of fuel sprays formed by densely-distributing droplets. A specially designed synchronization system is developed to acquire double-frame spray images at an arbitrary time delay after injection. A direct cross-correlation PIV technique is applied to measure instantaneous droplet velocity distribution. Unique large-scale structures in droplet concentration, called 'branch-like structures' by Azetsu et al. (1990), are observed and shown to be associated with active vortical motions, which appear to be responsible for the mixing between droplets and the surrounding gas. It is found that the droplets tend to move out of the vortical structures and accumulate in the regions of low vorticity. Some other interesting features concerning droplet velocity fields are also presented. [References: 12]
机译：本文报道了在30至70 MPa的喷射压力下，从单孔喷嘴喷射的柴油喷雾的颗粒图像测速（PIV）测量，可与商用柴油发动机的部分负荷运行条件相媲美。燃料被喷射到压力高达2.0 MPa的非燃烧环境中。激光诱导荧光（LIF）技术用于可视化由密集分布的液滴形成的燃料喷雾的内部结构。开发了专门设计的同步系统，以在注入后的任意时间延迟获取双帧喷涂图像。直接互相关PIV技术用于测量瞬时液滴速度分布。液滴浓度的独特大规模结构，被Azetsu等人称为“分支状结构”。 （1990年），观察到并显示出与主动涡旋运动，这似乎是造成液滴和周围的气体之间的混合负责。发现液滴倾向于从涡旋结构中移出并积聚在低涡旋的区域中。还提出了一些其他有关液滴速度场的有趣特征。 [参考：12]

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