Stable control of the motion of gas bubbles dissolved in a vibrating fluid in microgravity conditions

Michael Shoikhedbrod

Abstract

Previous theoretical and experimental studies of the effect of vibration on gas bubbles, dissolved in a fluid, permitted to establish the localization and stable position of a “swarm” of gas bubbles at a certain level of fluid in the vessel corresponding to a certain frequency and vibration acceleration, aswell as to the volume of a swarm of gas bubbles. The control of a “swarm“ of gas bubbles in a fluid by using the vibration frequency change at constant vibration acceleration was proved. In addition, the conducted studies determined that at a certain frequency and vibration acceleration of vibration,a resonant phenomenon called vibroturbulization occurs in which the above the surface of the fluid air in a vibrating vessel takes an active part in the intense mixing of several immiscible fluids and in the formation of a homogeneous mixture. The paper presents the results of theoretical description ofstable control by the motion of gas bubbles, dissolved in a fluid, using vibration impact in conditions of microgravity, confirmed in the course of flight tests conducted on the board of flying laboratory aircraft IL-76K that led to the development of completely new method of degassing of fluid fuel in thefuel tank of a rocket engine and special fluids in the life support system of spacecraft during the space flight.

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