两相流动中摇摆引起的附加作用分析

Analysis of Rolling Induced Additional Effect on Two-phase Flow

对摇摆条件下竖直、水平和倾斜3种布置形式的管路系统中两相流动附加惯性力及由附加惯性力引起的附加压降进行详细的推导,并给出具体的附加惯性力及附加压降计算关系式。通过对比流动方向上由于摇摆引起的附加惯性力及重力分量的波动幅度,发现重力分量的波动是影响流动特性的主要因素。同时对竖直管道中附加压降计算式进行实验验证,结果表明计算式能很好地预测附加压降的变化规律,可用于摇摆条件下管内附加压降的计算。

Both the additional inertial force as well as the pressure drop induced by it on a two-phase flow system in tubes with vertical, horizontal and tilted layouts had been derived in detail. And correlations were given for calculating the additional force and pressure drop under the three layout conditions. Comparing the fluctuation amplitude of additional inertial force and gravity in flow direction, it was found that the gravity is a. critical factor in determining the flow characteristics. The correlation for calculating the additional pressure drop in a vertical pipe were evaluated against the experimental data, showing that the correlation could well predict the variation of additional pressure drop in rolling motion.