Experimental Study on Sluggish Bubble Behaviors in Pressure Waves

概要

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By means of high-speed photography and pressure transducers, the motion of a gas- or a vapour-slug bubble is observed in pressure waves. The velocity of a water jet, formed at the spherical top surface of a slug bubble, is measured on the high-speed photographs, and it is confirmed that the velocity is less than 10m/s even in the case of a vapour slug bubble, and that the pulsation of the gas slug bubble in the pressure waves is treated as an adiabatic one. Moreover, the impact pressure of the water jet against the pressure transducer, set in the gas slug bubble, is measured, and it is also confirmed that the value is the same as the one, estimated by the stagnation pressure. of the water jet.
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