吕明,宁智,孙春华,李元绪

• 1:北京交通大学 机械与电子控制工程学院，北京 100044

摘要(Abstract)：

在超空化燃油射流使得喷雾中部分燃油分裂液滴内含有空化气泡；空化气泡的生长对液滴的分裂与雾化具有重要的影响。研究基于VOF方法对燃油液滴内空化气泡的生长过程进行了数值模拟，结合R-P方程对单液滴内空化气泡生长控制机理及影响因素进行了分析。结果表明，单液滴内空化气泡的生长可以按控制机理划分为表面张力控制阶段、综合竞争阶段和惯性力控制阶段。在第I生长阶段，空泡的生长主要受表面张力的控制作用；在第Ⅱ生长阶段，空泡的生长主要受表面张力、惯性力及黏性力三者的综合作用；在第Ⅲ生长阶段，空泡的生长主要受惯性力的控制作用。最后，利用建立的数值计算模型对表面张力系数、液体黏度及液体密度对液滴内气泡生长过程的影响进行了分析。

关键词(KeyWords)： 液滴;空化气泡;生长;控制机理;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51276011，51606006）；中国博士后科学基金（2016M591061）；中央高校基本科研业务费专项资金（2016JBM049）。

作者(Author): 吕明,宁智,孙春华,李元绪

DOI: 10.3969/j.issn.1003-9015.2016.06.008

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