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

作　　者：郑学波 吕宇超 彭佳庆 骆政园[3] 白博峰[3] ZHENG Xuebo;LU Yuchao;PENG Jiaqing;LUO Zhengyuan;BAI Bofeng(School of Energy and Electrical Engineering,Chang'an University,Xi'an 710064,China;Xi'an Aerospace Propulsion Institute,Xi'an 710100,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]长安大学能源与电气工程学院,西安710064 [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

出　　处：《工程热物理学报》2024年第6期1763-1766,共4页Journal of Engineering Thermophysics

基　　金：长安大学中央高校基本科研业务费专项资金资助项目(No.300102222109)。

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N_(2)O_(4)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N_(2)O_(4)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17μm;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。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 fuid oscillates back and forth,causing fuctuations in the volume,pressure,and inlet fow rate;at steady state,the volume of air remains unchanged,the pressure is equal to the inlet pressure,and the inlet flow rate is O;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 17μm;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 

分 类 号：TK121[动力工程及工程热物理—工程热物理]