气瓶火烧试验的热及力学响应数值模拟研究  

Numerical Studies on the Thermal and Mechanical Responses of Gas Cylinders Bonfire Test

作　　者：周国发[1] 李红英[1] 

机构地区：[1]南昌大学环境与化学工程学院,南昌330031

出　　处：《工业安全与环保》2013年第1期1-3,68,共4页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(20274016)

摘　　要：火烧试验中,气瓶内流体介质的温度和压力及气瓶壁的温度不断升高,导致气瓶破裂。基于分区求解、边界耦合数值解法和流固耦合传热理论,采用计算流体力学软件Fluent,建立燃烧火焰模型和气瓶传热(包括气瓶壁及其内部介质)耦合模型并进行计算,得到燃烧火焰的温度场、热流密度分布与气瓶的温度场及其内部介质的温度场、流场和压力场。通过节点插值方法,实现Fluent热边界无缝转化到有限元软件Ansys中继而进行热-结构分析。利用Fluent和Ansys联合仿真模拟预测气瓶爆破时间,对于气瓶的灭火救援具有一定的指导意义。In bonfire test,the continuous increase of the temperature and the internal pressure of gas cylinder could lead to blast.Based on zoning solution,boundary coupling and fluid-solid coupling heat transfer theory,the CFD software Fluent is used to set up numerical modeling of combustion flame and gas cylinder heat transfer(including the cylinder and its internal media) and obtain the information about the temperature fields,heat flux distributions of the fire environment and gas cylinder and the temperature and pressure field of its filling medium.It implements the seamless conversion of thermal boundary between?Fluent and Ansys for thermal-structure analysis,by means of node interpolation method.This paper realizes numerical co-simulation of Fluent and Ansys to forecast blasting time,which may supply certain guiding significance for the fire-fighting measures.

关 键 词：分区耦合 流固耦合 FLUENT ANSYS 爆破 

分 类 号：TH49[机械工程—机械制造及自动化]