复杂管网中推进剂充填过程气液两相流动特性研究
Investigation on Two-phase Priming Process of Propellant in Complex Pipeline
郑学波 1吕宇超 2彭佳庆 3骆政园 3白博峰3
作者信息
- 1. 长安大学能源与电气工程学院,西安 710064;西安交通大学动力工程多相流国家重点实验室,西安 710049
- 2. 西安航天动力研究所,西安 710100
- 3. 西安交通大学动力工程多相流国家重点实验室,西安 710049
- 折叠
摘要
充填条件不同,充填稳定后供应管网中空气-推进剂相分布状态不同,造成供应过程不同分支流量差异.本文基于Fluent,采用VOF模型研究了充填过程气液两相流动特性,得到如下主要结论:1)环管中两股射流对撞时,管内空气体积最小,压力达到峰值;随后管内流体来回震荡,空气体积、压力和入口 N2O4流量产生波动;充填稳定后,管内空气体积基本不变,压力与入口压力相等,入口 N2O4流量为0;2)射流与入口 T形管壁面撞击、两股射流对撞过程会产生大量微小气泡,最小气泡尺寸约为17 μm;3)初始压力越低或入口压力越高,峰值压力越高,达到稳定所需时间越短,稳定时管内空气体积越小.
Abstract
In this paper,based on FLUENT,the VOF model is used to investigate the propellant-air two-phase flow characteristics of the priming process in complex pipeline.The main findings include:1)when two jets collide,the air volume is the smallest and the pressure reaches its peak;subsequently,the fluid oscillates back and forth,causing fluctuations in the volume,pressure,and inlet flow rate;at steady state,the volume of air remains unchanged,the pressure is equal to the inlet pressure,and the inlet flow rate is 0;2)The collision between the jet and the wall at the inlet,as well as the collision between two jets,will generate a large number of micro bubbles,with a minimum bubble size of approximately 17 μm;3)The filling process under different initial and inlet pressures is similar.
关键词
复杂管网/推进剂充填/气液相分布/气泡尺寸Key words
complex pipeline/priming process of liquid propellant/phase distribution/bubble size引用本文复制引用
基金项目
中央高校基本科研业务费专项长安大学项目(300102222109)
出版年
2024
NETL
NSTL
万方数据