火箭推进2018，Vol.44Issue(6)：53-56,4.
低温预冷管路流动及传热非稳态特性研究#
Investigation on unsteady characteristics of flow and heat transfer in cryogenic precooling pipe
摘要
Abstract
The circulation precooling of cryogenic liquid rocket engine and pipeline involves complicate flow regimes transform and heat transfer process, which affects the precooling effect of the rocket engine and its pipeline distinctly. In order to accurately analyze the flow regimes transform and heat transfer mechanism in the precooling loop during the filling process of cryogenic medium, a one-dimensional mathematical model of fluid dynamic and heat transfer in homogeneous equilibrium state was established. Under the unsteady state, the distribution of fluid parameters in the pipeline of liquid hydrogen precooling cycle was analyzed by using the discretized method. The heat transfer law and its influence factors of cryogenic liquid filling were obtained. The numerical results provide a theoretical basis for studying the precooling performance and optimizing the adiabatic design of pipe.关键词
非稳态/循环预冷/截面含气率/膜态沸腾Key words
unsteady state/circulation precooling/void fraction/filming boiling分类
航空航天引用本文复制引用
程向华,薛会建,李宏刚,厉彦忠..低温预冷管路流动及传热非稳态特性研究#[J].火箭推进,2018,44(6):53-56,4.基金项目
国家自然科学基金(51376142) （51376142）
