摘要
针对尾流气泡运动过程中上浮速度与半径变化互相影响的动态耦合问题,分析了气泡的受力情况,考虑到非恒定Basset力的影响,得出了气泡瞬态加速度模型;并在气泡传质模型中引入非平衡传质理论,得出了气泡的瞬态非平衡传质模型;进而依据气泡质量变化率实现了两模型的耦合,以此构建了完整的船舶远程尾流场中气泡上浮运动模型。计算结果表明,Basset力对运动初始阶段的速度变化影响显著,而引入非平衡传质理论的计算结果与实验吻合更好。
The radius and velocity of bubble in the far wake of ship are interacted while the bubble rising process. To describe this process more accurately, two models were provided： the transient acceleration model was according to forces on a rising bubble, particularly the Non-Constant Basset force; the transient mass transfer model of bubble was based on nonequilibrium mass transfer theory. And in order to form a integrated model of the bubble rising, these two models were coupled together by mass gradient of the bubble. Calcu- lation results show that Basset force has a significant influence on the velocity variation at the earlier stage of bubble rising, and the calculated results by the integrated model are closer to experimental data.
出处
《船舶力学》
EI
北大核心
2010年第11期1195-1201,共7页
Journal of Ship Mechanics
基金
国家"十一五"水动力学预研资助项目(5131403010340103020204)
