静止液体中浸没垂直导管口气泡脱离直径的预测

Prediction of bubble detachment diameter at a submerged vertical orifice in quiescent liquid

该文主要针对单个气泡在静止液体中的生成和脱离过程,探究准确度高的气泡脱离直径预测模型。根据实验条件,分析了不同工况下表面张力、黏滞阻力和惯性力对气泡生成与脱离过程影响的强弱变化。结果显示,韦伯数We是影响气泡脱离直径预测的关键因素。在实验数据的基础上,分析了韦伯数We对气泡脱离直径的影响,以此修正了气泡脱离直径预测模型。经验证表明,新模型具有较高的准确性和适应范围。

This article is mainly about the single gas bubble formation and detachment at a submerged vertical orifice. Prediction models of gas bubble detachment diameter with high accuracy was explored. According to experimental conditions, the effects of the three main forces acting on the gas bubble, including surface tension, viscous force, and inertia force, were analyzed at different operating conditions. The result shows that Weber number is the key factor of gas bubble detachment diameter. Based on the experimental data, an optimized model was developed by introducing Weber number in the correlation to predict gas bubble detachment diameter. It has been testified that the new model has higher accuracy and wider applicable range.