| 摘要:基于Fluent计算软件，对某型天然气焚烧装置（ gas combustion 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。 |
| 关键词: LNG船舶 BOG处理 气体焚烧装置 数值模拟 |
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| Numerical Simulation of Gas Combustion Unit for LNG Ships Based on Fluent |
| ZHANG Qiang,HUANG Liang,YU Zhipeng,XIAO Zhaoyu,SHEN Bohan |
| Shanghai Marine Diesel Engine Research Institute，Shanghai 201108，China |
| Abstract: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. |
| Key words: LNG ship boil off gas treatment gas combustion unit numerical simulation |
