Visualized experiments and analysis of the icing behavior of water and carbon dioxide impurity in liquid oxygen
High-boiling temperature impurities in cryogenic propellants may block filters during subcooling and af-fect propellant transportation.To address this problem,a microscopic visualized experimental system was designed and established to study the behaviors of ice crystals and carbon dioxide impurities in liquid oxygen.The formation and growth characteristics of water and carbon dioxide in liquid oxygen under small volume composition conditions and at different temperatures.With the coexistence of water and carbon dioxide in liquid oxygen,a part of water formed into fine ice crystals first,which mixed with carbon dioxide to form a loose flocculent structure.When the water crystals reached a saturated state in the flocculent structure,their shapes did not change,while the remaining water gradually turned into free ice crystals.The flocculent structure disintegrated in the cooling stage from 90 K to 65 K,which produced small pieces with an average volume decrease of 50％.This phenomenon facilitates the liq-uid oxygen-containing impurities to pass through the filters.This work on the icing behavior of water and carbon di-oxide impurities in liquid oxygen can design the filtering component and calculate fluid flow resistance for cryogenic propellant filling systems.
国家科技期刊平台
NSTL
万方数据
维普
