静水中气泡上升运动及阻力系数研究

Study on kinetic properties and drag coefficient of rising bubble behavior in still water

采用模型计算法与实验法结合的方式对静水中气泡上升运动行为进行研究。通过牛顿运动定律,基于不同物理模型,建立气泡在水中运动的微分方程;假设气泡在运动过程中的关键参数取值,推导小气泡在水中浮升过程中的气泡行为预测公式;针对不同流态下的气泡上升关键参数进行适应性分析和算例计算。通过设计气泡上升运动实验,对气泡上升运动公式进行适应性分析,修正关键参数的取值。据此提出一种小气泡上升运动规律的计算方法以及关键参数取值方式及参考区间。

Bubble rising behavior is studied mainly through the combination methodology of model calculation and experimentation in this paper.Based on Newton’s laws of motion,the differential equation of bubble rising behavior for different physics models are established;the values of key factors of bubble rising behavior are assumed and used to derive the prediction formula of the bubble rising behavior parameters.The adaptability analysis and numerical calculation are carried out for different flow patterns.The bubble rising behavior experiment has also been designed to illustrate the adaptability analysis and to amend the key parameter value.Bases on these results,a new method for the bubble rising behavior and determining the corresponding parameter values is presented in this paper.