高校化学工程学报2016，Vol.30Issue(6)：1292-1299,8.DOI:10.3969/j.issn.1003-9015.2016.06.008
液滴内空泡生长控制机理及影响因素的研究
Control Mechanism and Affecting Factors of Cavitation Bubble Growth within a Droplet
摘要
Abstract
Cavitation bubbles exist in diesel droplets when bulk liquids break up under supercavitation of diesel injection, and they can increase droplet instability during bubble growth, while the mechanism of this effect is still not clear. Spherically symmetric bubble expansion within diesel droplets was numerically simulated based on the volume of fluid (VOF) method, and the control mechanism and affecting factors of bubble growth were analyzed by Rayleigh-Plesset equation. The results show that the bubble growth process can be divided into three stages including surface tension controlled domain, comprehensive competition controlled domain and inertial force controlled domain. Cavitation bubble growth is mainly controlled by surface tension during the first stage, and the inertial force acting on bubble-liquid interface and the viscous force are insignificant. During the second stage, bubble growth is controlled by comprehensive competition among surface tension, inertial force and viscous force. Finally, bubble growth is significantly controlled by inertial force during the third stage. The effects of surface tension coefficient, liquid viscosity and density on bubble growth process were analyzed.关键词
液滴/空化气泡/生长/控制机理/数值模拟Key words
droplet/cavitation bubble/growth/control mechanism/numerical simulation分类
数理科学引用本文复制引用
吕明,宁智,孙春华,李元绪..液滴内空泡生长控制机理及影响因素的研究[J].高校化学工程学报,2016,30(6):1292-1299,8.基金项目
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)。 （51276011，51606006）
