Ultrasonic wave propagations in a bubbly gas-liquid two-phase flow.

The study of ultrasonic wave propagations in a bubbly gas/liquid two phase flow are conducted experimentally and theoretically. The ultrasound wave propagation wave forms in a bubbly gas/liquid two phase flow are analyzed based on wave forms, obtained from ultrasonic wave interactions with a single bubble in a silicone oil, and compared with bubbly air/water two phase flow for various ranges of bubble sizes, void fractions and flowrates. Experimental and theoretical results, from a given equation are compared. In multi bubbly flow experiments, transmitted sound wave forms observed for various gas flow rates are given. The wave forms of a single bubble interacting with the sound beam were found to be identical to that of the given equation and the single bubble experiment in silicone oil. The effect of multi bubble interaction with sound beam was analyzed to obtain bubble radius and rising velocity. (from authors' abstract)