EXPERIMENTAL STUDY OF OSCILLATORY FLOW CHARACTERISTICS OF GAS–LIQUID TWO-PHASE FLOW

The oscillatory flow characteristics of the gas-liquid two-phase flow are thoroughly studied through visualization experiments. The results show that the oscillatory motion of the gas-liquid two-phase flow obeys specific rules not only in the primary oscillation stage but also in the full oscillation stage. The bubble state and turbulence intensity of the oscillatory two-phase flow are mainly affected by oscillation frequency; otherwise, the flow pattern and movement rule of the oscillatory two-phase flow are mainly affected by the water filling ratio. Both oscillation frequency and water filling ratio have significant effects on the duration and the maximum bubble size in the primary oscillation stage. The effects of oscillation frequency on bubble size and mixing ratio in the full oscillation stage are higher than those of the water filling ratio. The mixing degree of two phases is supreme in the case of low water filling ratio and high oscillation frequency.