• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Study of the far field of a pulsed spray from an automotive fuel injector.
【24h】

Study of the far field of a pulsed spray from an automotive fuel injector.

机译：汽车喷油器脉冲喷雾远场的研究。

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

Pulsed liquid sprays from automotive fuel injectors are inherently complicated and the formation and development of sprays involve multiple physical processes which take place both simultaneously and sequentially. The pulsed spray characteristics far from the injector orifice are affected by complicated mechanisms of primary and secondary break-up at and close to the injector tip. This complexity usually requires researchers to make assumptions about break-up mechanisms. In addition, several droplet collision models have been proposed for sprays, but when used in conjunction with break-up mechanism models, the accuracy and limitation of collision models have been difficult to judge. This study is intended to explore, examine and compare different collision models in a pulsed fuel spray. Since trustworthy laser diffraction measurements of droplet size distribution can be performed far from the injector orifice, these data can be used as accurate initial conditions for simulating downstream spray development. Since the pulsed sprays from automotive fuel injectors are relatively dense ones, this study eliminates the complexity of simulating two-phase flow equations for break-up and instead solves the simpler fluid mechanics problem of the Lagrangian trajectory of spray droplets, together with a droplet collision model. It was found that for the single-hole sprays of this study, when the droplet size distribution is known at some plane downstream of the break-up region, the development of the spray can be modeled accurately by using a simple Lagrangian model which calculates the droplet collision impact parameter analytically at each collision.
机译：来自汽车燃料喷射器的脉冲液体喷雾本质上是复杂的，并且喷雾的形成和发展涉及同时地和顺序地发生的多个物理过程。远离喷射器孔口的脉冲喷雾特性受喷射器尖端及其附近的一次和二次破碎的复杂机制影响。这种复杂性通常要求研究人员对分解机制做出假设。另外，已经提出了几种用于喷雾的液滴碰撞模型，但是当与破碎机理模型结合使用时，很难判断碰撞模型的准确性和局限性。本研究旨在探索，检查和比较脉冲燃油喷雾中的不同碰撞模型。由于可以对液滴尺寸分布进行可靠的激光衍射测量，因此可以远离喷射孔进行测量，因此这些数据可以用作模拟下游喷雾发展的准确初始条件。由于来自汽车喷油器的脉冲喷雾是相对致密的，因此本研究消除了为破裂而模拟两相流方程的复杂性，而是解决了喷雾的拉格朗日轨迹与液滴碰撞的更简单的流体力学问题。模型。已经发现，对于本研究的单孔喷雾，当在破碎区域下游的某个平面上知道液滴的大小分布时，可以通过使用简单的拉格朗日模型来精确地模拟喷雾的发展，该模型计算出分析每次碰撞时的液滴碰撞冲击参数。

著录项

  • 作者

    Roshanghalb, Farid.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Mechanical engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 127 p.
  • 总页数 127
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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