基于Fluent的LNG船舶天然气焚烧装置数值模拟  

Numerical Simulation of Gas Combustion Unit for LNG Ships Based on Fluent

作　　者：张锵 黄亮 俞志鹏 肖照宇 申博涵 ZHANG Qiang;HUANG Liang;YU Zhipeng;XIAO Zhaoyu;SHEN Bohan(Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China)

机构地区：[1]上海船用柴油机研究所,上海201108

出　　处：《柴油机》2023年第5期14-22,共9页Diesel Engine

基　　金：船舶与海洋工程特种装备和动力系统国家工程研究中心资助项目。

摘　　要：基于Fluent计算软件,对某型天然气焚烧装置(gascombustion unit,GCU)进行数值模拟研究,分别在最高工况和最低工况下,以100%、70%、30%等3种CH4体积分数进行仿真模拟,对燃烧后温度场、速度场和CH4体积分数分布进行数值模拟。模拟结果表明:在最大工况下,随着蒸发气(boil of gas,BOG)中可燃物组分的降低,排气温度降低,高温区段变短,CH4扩散区域变小,火焰长度变短,宽度无明显变化;在最小工况下,火焰不再聚拢成型,随着BOG中可燃物组分的降低,排气温度降低,高温区域无明显变化。The Fluent computing software was used to conduct a numerical simulation study of a type of gas combustion unit(GCU),the temperature field,velocity field and methane concentration distribution after combustion was simulated with three methane volume fractions of 100%,70%and 30%under the highest and lowest working conditions,respectively.The simulation results show that:Under the maximum working condition,with the decrease of fuel component in BOG(boil off gas),the exhaust temperature decreases,the high-temperature region becomes shorter,the methane diffusion region becomes smaller,the flame length becomes shorter,and the width has no significant change;In the minimum working condition,the flame no longer gathers and forms,and with the decrease of fuel component in BOG,the exhaust temperature decreased,and there was no significant change in the high-temperature region.

关 键 词：LNG船舶 BOG处理 气体焚烧装置 数值模拟 

分 类 号：TK434.6[动力工程及工程热物理—动力机械及工程]