A suppression structure for space water sublimator to prevent breakdown instability

Abstract

A space water sublimator suppression structure for preventing breakdown and instability, belonging to the technical field of temperature control, the water storage tank is connected to the main body of the water sublimator through water pipes, the porous plate is sealed and bonded to the upper part of the main body of the water sublimator, and the entire space water sublimator passes through The tapered holes in the perforated plate communicate with the vacuum of the external space, and the external side of the perforated plate is in the vacuum environment of the space. When the water sublimator is running, the water supply cavity of the water sublimator will be filled with liquid water, and the liquid water will rise to When in the perforated plate, due to the sudden drop in pressure, its temperature and pressure drop to the triple point, an ice layer is formed in the tapered hole of the porous plate, and the ice layer in the tapered hole of the porous plate is separated between the ice layer and the wall of the tapered hole. Under the synergistic effect of the frictional resistance between the holes, the positive pressure exerted by the shrinkage holes on the ice layer, and the additional capillary pressure generated by the shrinkage holes, the hydraulic pressure at the bottom will not penetrate the ice layer, and the purpose of suppressing the breakdown and instability of the space water sublimator will be achieved. .

Description

technical field [0001] The invention belongs to the technical field of temperature control, and relates to a space vehicle thermal control system component performance improvement structure, in particular to a space water sublimator suppression structure for preventing breakdown instability. Background technique [0002] With the rapid development of my country's manned spaceflight technology, space activities such as lunar sampling, Mars exploration, and space station construction have become more and more frequent, and astronauts' out-of-cabin activities will also become more frequent. According to the survey, the construction process of the International Space Station is expected to require 2000h / year out-of-cabin activities for assembly and maintenance work, and the amount will increase by 50% every year in the first few years. During extravehicular activities, the metabolism of astronauts and the heat dissipation of electronic devices in spacesuits will increase the tem...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a space water sublimator suppression structure to prevent breakdown and instability, by optimizing the structure of the porous plate in the water sublimator, changing the The current situation of single resistance restraining breakdown instability, using frictional resistance, additional capillary pressure and positive pressure on the structure wall to jointly lock the ice layer, can be stabilized under the working conditions of ordinary water sublimator reaching breakdown instability Reliable operation, maximizing the stable operation range of the water sublimator

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