考虑单气泡运动特性的舰船尾流气泡分布研究

摘要

In order to analyze the bubble distribution in ship wake theoretically, the motion characteristics and influence factors of the single bubble are studied. The strong-coupling interaction between bubble rising velocity and mass-transfer velocity is considered emphatically, and a dynamic model to describe the whole process of bubble motion in the ship wake is established. Based on the model and statistical analysis, a convenient method to calculate the bubble residence time, relative number density and size distribution is proposed. The simulation results coincide with the experimental data better.%为从理论上分析舰船远程尾流中的气泡分布特征,首先研究了单个气泡在远程尾流中的运动特性及影响要素,重点考虑了上浮速度与传质速率这两个相互影响的耦合因素,构建了完整描述远程尾流场中单气泡上浮运动全过程的动态耦合数学模型；进而利用该模型结合统计分析的思想,提出了一种计算舰船远程尾流场中气泡群整体存留时间、相对数密度和尺度分布变化等重要特征的便捷方法；其计算结果与实验数据吻合良好,表明了该模型和方法的科学性.