Research On The Liquid Management In The Plate Surface Tension Tank Under Microgravity

The space system is composed of multiple systems, and the propulsion system plays a vital role in the normal operation of the aircraft, and the liquid propellant tank is an indispensable part of in the propulsion system, the object behavior especially liquid behavior in microgravity environment has significantly different with that in the ground, because of these differences, it puts forward a new challenge to the storage?control and transmission of fluid (liquid and gas). As a result, the study of the fluid flow phenomena in propellant storage and interface behavior under space environment and the microgravity fluid management has became an important subject in the aerospace engineering. Around this topic, this paper is carried out under the following four sorts of work:First of all, I use the Attension Theta Optical Tensiometer to survey one of the most important parameters in capillary flow "contact angle" in depth, and conduct many measurement to the contact angle in the curved surface, and draw relevant conclusions.Secondly, I compile the three-dimensional gas-liquid equilibrium interface calculation program "Surface Evolver", and analysis the liquid form in plate surface tension tank under the zero gravity, and verify the applicability of Concus-Finn in interior angle, and puts forward some reference for the structure design of tank.Then, I have made some quantitative analysis to the capillary flow in the tank under the particular working condition and specific working using Flow 3D, and compare with the drop tower test results in fifth chapter, and provide reference for the future deepgoing study.Finally, I take advantage of the Drop Tower microgravity condition provided byThe national microgravity experiment department of institute of mechanics in Chinese academy of sciences, and carried on abundant drop tower experiments, and finally discuss the following four aspects:(1) The influence of guide plate to the capillary climb in the tank; (2) The influence of the blade of guide plate and the liquid storage pool to the fluid flowing; (3) The effect of the different medium (different contact angles) on capillary climb; (4) The effects of viscosity on capillary climb, when all the liquid have the same contact angle and their infiltration is very good.