Abstract: Spraying is widely used in many fields such as agriculture, aerospace, engine, medical and so on. Good liquid film atomization plays a vital role in reducing energy loss, among which annular jet has the characteristics of short fragmentation length and high atomization quality with its unique structure, so this paper elaborates the research status of annular liquid film jet fragmentation from three perspectives: theoretical research, experimental research and simulation analysis. The focus is on the mechanism of liquid film fragmentation, and the main factors affecting the liquid film fragmentation are summarized in the relevant analysis. The results show that linear stability analysis theory and nonlinear stability analysis theory are still the basis of theoretical analysis, large eddy simulation (LES) and volume of fluid (VOF) method are the more applied research methods of numerical simulation, liquid viscosity, Weber number, liquid surface tension, etc. have a greater influence on annular jet atomization. However, the study of atomization quality under large liquid Weber number is still relatively small, increasing the choice of operating point and increasing the mutual verification between simulation and experiment, which is one of the important difficulties in the future research and development of the annular jet.

Key words: Spray; Annular jet; Fragmentation mechanism; Weber number; Liquid film atomization

摘要： 喷雾广泛应用在农业、航空航天、发动机、医疗等多个领域。良好的液膜雾化对减少 能源损耗起着至关重要的作用，环状射流其独特的结构具有碎裂长度短以及雾化质量高的特 点，所以论文从理论研究、实验研究、仿真分析三个角度阐述了环状液膜射流碎裂的研究现 状。重点对液膜碎裂机理，影响液膜碎裂的主要因素进行了相关分析总结。结果表明，线性 稳定性分析理论和非线性稳定性分析理论仍是理论分析的基础，大涡模拟（LES）和流体体 积法（VOF）是数值模拟应用较多的研究方法，液体粘度、韦伯数、液体表面张力等对环状 射流雾化影响较大。但在大液体韦伯数下的对雾化质量研究还较少，增加工况点的选择，加 大仿真与实验间的相互验证，这是环状射流在未来研究和发展的重难点之一。

关键词: 喷雾；环状射流；碎裂机理；韦伯数；液膜雾化