固体火箭技术2023，Vol.46Issue(6)：955-962,8.DOI:10.7673/j.issn.1006-2793.2023.06.020
燃气-蒸汽弹射气液两相流场流动耦合特性研究
Study on flow coupling characteristics of gas-liquid two-phase flow field in gas-steam ejection
王凯 1苟金澜 2乐贵高 1李仁凤 3刘纪伟1
作者信息
- 1. 南京理工大学 机械工程学院,南京 210094
- 2. 武汉第二船舶设计研究所,武汉 430064
- 3. 郑州航空工业管理学院 航空工程学院,郑州 450046
- 折叠
摘要
Abstract
In order to study the flow coupling characteristics of gas-liquid two-phase flow field in gas-steam ejection,a numeri-cal model which takes into account the effects of vaporization,component transport and dynamic mesh was established based on Mixture model and RNG k-ε turbulence model,and combined with a self-defined vaporization condensation program.The effective-ness of the model was verified by tail-flame injection test of a simulated injector.On this basis,the formation of complex wave sys-tem and the coupling characteristics of gas-liquid flow were analyzed,and the influence of the diameter of the spout hole on the gas-liquid two-phase flow field was studied.The results show that a series of expansion waves and compression waves generated by pipe structure and water jet constraints can intersect and reflect in the pipe to form a wave system.The wave system divides the internal flow field into different regions by affecting the properties of the two-phase flow.The Dean vortex formed by centrifugal force in the elbow can enhance the turbulence intensity and improve the efficiency of water vapor conversion and mass transfer and heat transfer.At the same time,the water jet has a strong blocking and squeezing effect on the gas flow,both two will squeeze each other at the spray pipe due to energy difference.When the total area of the spout hole is the same,the smaller the diameter,the smaller the mass flow rate,and the higher the water vapor conversion efficiency.The larger the diameter,the greater the fluctuation in tempera-ture and pressure,and the more unstable the missile motion.The results can provide reference for flow field analysis and structural design of gas-steam ejection.关键词
燃气蒸汽弹射/动力弯管/气液两相流/流动耦合特性/喷水孔直径Key words
gas-steam ejection/power elbow tube/gas-liquid two-phase flow/flow coupling characteristics/blowhole diameter分类
航空航天引用本文复制引用
王凯,苟金澜,乐贵高,李仁凤,刘纪伟..燃气-蒸汽弹射气液两相流场流动耦合特性研究[J].固体火箭技术,2023,46(6):955-962,8.
