火箭推进2025，Vol.51Issue(2)：41-51,11.DOI:10.3969/j.issn.1672-9374.2025.02.005
液氧电动屏蔽泵预冷流动换热与调控方法
Flow heat transfer and control method in the pre-cooling process of a liquid oxygen electric shield pump
摘要
Abstract
To investigate the flow characteristics of a liquid oxygen electric shield pump during the pre-cooling process,a flow heat transfer model was established for the pump and a low-temperature medium pre-cooling test platform was constructed to conduct numerical simulations and experimental research on heat transfer and flow behavior.The results indicate that the precooling time of the electric shield pump is primarily influenced by the flow rate,temperature,and pressure of the pre-cooling medium.During pre-cooling,cooling of the motor wall is more challenging compared to that of the pump wall surface;therefore,it is recommended to use higher discharge flow rates for effective motor cooling.The change in pressure inside the pump alters the flow pattern in the motor basin during pre-cooling,which slows down the medium velocity and reduces heat transfer between the medium and pump body.Gasification mainly occurs in specific areas such as between two bearings on the rotor's outer wall section within the motor chamber and rear chamber of the pump due to the influence from the pre-cooling flow mode.By appropriately increasing both the pre-cooling flow rate and pressure in the pump chamber,it is possible to enhance medium velocity within the motor basin effectively improving overall efficiency while avoiding excessive consumption.关键词
电动屏蔽泵/排放预冷/数值计算/流场分析/流固换热Key words
electric shielded pump/discharge pre-cooling/numerical computation/flow analysis/fluid-solid heat transfer引用本文复制引用
陆冠熙,张秉龙,杨学森,项效镕,赵巍,赵庆军..液氧电动屏蔽泵预冷流动换热与调控方法[J].火箭推进,2025,51(2):41-51,11.基金项目
国家科技重大专项(J2019-Ⅲ-0010-0054 （）
J2019-Ⅱ-0014-0035) （）
