高空机载灭火剂流动输运数值仿真
Numerical simulation of flow and transport phenomena for airborne fire extinguishing agents at high altitude
杨琪 1王鑫宇 1刘晶晶 1范怀良2
作者信息
- 1. 中国民航大学 民航热灾害防控与应急重点实验室,天津 300300
- 2. 合肥先进计算中心,安徽 合肥 230088
- 折叠
摘要
为探究高空环境对飞机货舱灭火系统内灭火剂流动输运动态的影响,采用Fluent软件对一小型"哈龙"1301机载灭火系统装置管网中灭火剂的流动输运进行数值建模与仿真模拟,计算得到10 000 m及13 000 m高空下"哈龙"1301灭火剂在管网内的输运和释放动态,并与海平面高度下灭火剂输运释放过程中压力、相体积分数及相变传质速率三个特征变量进行对比分析.结果表明,高空环境下灭火剂的输运释放遵循"三阶段",但高海拔环境不利于灭火剂的流动输运.该研究结果可为优化机载灭火系统在高空环境下的流动输运能力提供理论依据.
Abstract
In order to investigate the influence of high altitude en-vironment on the dynamics of extinguishing agent flow and trans-port in aircraft cargo hold fire extinguishing system,this paper adopts Fluent software to numerically model and simulate the dy-namics of extinguishing agent flow and transport in the pipeline network of a small Halon 1301 airborne fire extinguishing system device,and obtains the dynamics of transport and release in the pipeline network of Halon 1301 at altitude of 10 000 m and 13 000 m.The transport and release dynamics of Halon 1301 extinguish-ing agent in the pipe network at high altitude were calculated,and compared and analyzed with three characteristic variables,namely,pressure,phase volume fraction and phase change mass transfer rate during the transport and release process of extinguish-ing agent at the altitude of sea level.The results show that the transportation and release of extinguishing agents at high altitude follow the"three-phase"process,but the high altitude environ-ment is not favorable to the flow and transportation of extinguish-ing agents.The results of this study can provide a theoretical basis for optimizing the flow and transport capacity of airborne fire ex-tinguishing systems in high-altitude environments.
关键词
流体仿真/航空消防/机载灭火系统/气液相变/计算流体力学Key words
fluid simulation/aviation firefighting/airborne fire suppression systems/gas-liquid phase change/computational fluid dynamics引用本文复制引用
基金项目
天津市教委科研计划项目(2021KJ034)
出版年
2024
NETL
NSTL
万方数据