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

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

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