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过程工程学报 ›› 2024, Vol. 24 ›› Issue (3): 273-283.DOI: 10.12034/j.issn.1009-606X.223157CSTR: 32067.14.jproeng.223157

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闪沸喷雾的研究现状与展望

高健， 洪润， 董文龙， 许年， 楚化强*   

  1. 安徽工业大学能源与环境学院，安徽 马鞍山 243002
  • 收稿日期:2023-05-26 修回日期:2023-08-23 出版日期:2024-03-28 发布日期:2024-03-27
  • 通讯作者: 楚化强 hqchust@163.com
  • 基金资助:
    高压环境下2,5-二甲基呋喃对汽油替代燃料层流扩散火焰碳烟生成影响机制研究

Research status and prospect of flash boiling spray

Jian GAO,  Run HONG,  Wenlong DONG,  Nian XU,  Huaqiang CHU*   

  1. School of Energy and Environment, Anhui University of Technology, Ma'anshan, Anhui 243002, China

  • Received:2023-05-26 Revised:2023-08-23 Online:2024-03-28 Published:2024-03-27
  • Contact: CHU Hua-qiang hqchust@163.com

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摘要： 通常将高温燃油进行喷射至低压环境中时发生的急速沸腾现象称为闪急沸腾(简称为闪沸)，合理地利用闪沸现象可以有效改善燃油喷雾的雾化效果、提高发动机效率。本综述总结了闪沸喷雾的相关理论，简要介绍了部分常用于观测闪沸喷雾的可视化技术。对比了不同燃料的闪沸喷雾的研究，归纳了不同燃料特性对闪沸喷雾的影响，总结了多组分燃料的闪沸喷雾特性；通过对非闪沸喷雾与闪沸喷雾研究现状进行对比，归纳了非闪沸与闪沸喷雾的坍塌机理与喷雾坍塌的影响因素。提出了闪沸喷雾可行的研究方向：多组分燃料的闪沸喷雾特性研究、闪沸喷雾坍塌机理研究以及抑制闪沸喷雾坍塌的研究。

关键词: 闪沸喷雾, 非闪沸喷雾, 喷雾特性, 喷雾坍塌, 可视化技术

Abstract: The rapid boiling that occurs when high-temperature fuel is injected into a low-pressure environment is called flash boiling, reasonable use of flash boiling phenomenon can effectively improve the atomization effect of fuel spray and improve engine efficiency. The research on the flash boiling phenomenon can be traced back to more than 60 years ago. With the development of the research on the flash boiling spray, the focus of the spray-related research has gradually shifted to the spray collapse. The related theories of flash boiling spray are summarized in this review, and some visualization techniques commonly used in the observation of flash boiling spray are briefly introduced. The influence of different fuel characteristics on the flash-boiling spray is illustrated by comparing different fuel characteristics. The characteristics of flash boiling spray of multi-component fuel are summarized. The superheat index which can be used to measure the flash boiling spray of multi-component fuel are introduced. The collapse mechanism of non-flash boiling spray and flash boiling spray and the influencing factors of spray collapse are studied by comparing the research status of non-flash boiling spray and flash boiling spray. It is generally considered that the collapse mechanism of non-flash-boiling spray is jet-induced collapse, and flash-boiling spray seriously affects the experimental observation because of too many droplets. Therefore, the understanding of the collapse mechanism of the flash boiling spray is numerous but not certain. In addition, according to the above summary, several feasible research directions are put forward for the spray research: effect of different fuel properties on flash boiling spray, study of parameters to measure the degree of superheat of multi-component fuels, the study on the collapse mechanism of the flash-boiling spray and the study on the suppression of the collapse of the flash-boiling spray.

Key words: flash boiling spray, non-flash boiling spray, spray characteristics, spray collapse, visualization technology