The Control by the Behavior of Gas Bubble, Fastened to the Solid Surface, Using Nonpolar Reagent and Blowing Agent Actions under Changing of the Acceleration of Gravity

Abstract

The study of separation or retention of a gas bubble, fastened to solid surface in the liquid with varying acceleration of gravity currently is relevant in connection with the solution of the problem of degassing fuel in an airplane during overloads. Solving of the problem comes to investigation of the possibility of control by the behavior of the gas bubble, fastened to the solid surface using nonpolar reagent and blowing agent actions under changing of the acceleration of gravity. The use of nonpolar reagent and blowing agent permits to change the coefficient of surface tension on the border of phase selection liquid-gas and contact wetting angle and therefore to change the energy parameters of the surface of the bubble and the forces that hold or tear it away from the surface of the solid material. The paper presents the results of theoretical and experimental study of the behavior of the gas bubble, fastened to the surface of surface solid, controlled decrease of surface tension and increase contact wetting angle by nonpolar reagent, and controlled increase of surface tension and decrease contact wetting angle by blowing agent under acceleration of gravity changing. The study led to creation of a computer mathematical model of the behavior of the gas bubble, fastened to the solid surface, under decrease of surface tension and increase contact wetting angle and increase of surface tension and decrease contact wetting angle under acceleration of gravity changing, experimentally proved during the process of conducted tests on the board of the flying laboratory (FL) IL-76K, that showed the possibility of the practical use of the developed computer model for simulation of real control by behavior of real gas bubbles or drops in the liquid of the wide range of bond numbers (β), fastened to the surface of the solid material, using nonpolar reagent and blowing agent actions under real changing of the acceleration of gravity.
Keywords: acceleration of gravity, automatic spacecraft, behavior of the gas bubble, computer mathematical modeling, real conditions of space flight, solid material