中国舰船研究2017，Vol.12Issue(5)：109-119,11.DOI:10.3969/j.issn.1673-3185.2017.05.014
大型LNG船发电机室的燃气管线泄漏分析
Leakage analysis of fuel gas pipe in large LNG carrier engine room
岑卓伦 1刘涛 1王磊 1窦旭1
作者信息
- 1. 沪东中华造船(集团)有限公司开发所,上海 200129
- 折叠
摘要
Abstract
[Objectives] The electric propulsion dual-fuel engine is becoming dominant in newly built Liquefied Natural Gas(LNG)carriers. To avoid the potential risks that accompany the use of flammable and explosive boil-off gas,the performance of precise safety and reliability assessments is indispensable. [Methods]This research concerns the engine rooms of large LNG carriers which are propelled electrically by a dual-fuel engine. Possible fuel gas(natural gas)leak cases in different areas of the engine room are simulated and analyzed. Five representative leak cases defined by leak form,leak location and leak rate are entered into a Computational Fluid Dynamics(CFD)simulation,in which the Reynolds stress model of Fluent software is adopted as the turbulence model. The results of the leaked gas distribution and ventilation velocity field are analyzed in combination to obtain the diffusion tendency and concentration distribution of leaked gas in different areas.[Results]Based on an analysis of the results,an optimized arrangement of flammable gas detectors is provided for the engine room, and the adoption of an explosion-proof exhaust fan is proven to be unnecessary. [Conclusions] These analysis methods can provide a reference for similar gas leakage scenarios occurring in confined ventilated spaces. In addition, the simulation results can be used to quantitatively assess potential fire or explosion damage in order to guide the design of structural reinforcements.关键词
液化天然气/管道泄漏/计算流体力学/定量风险评估Key words
Liquefied Natural Gas (LNG)/pipe leakage/Computational Fluid Dynamics (CFD)/quantitative risk assessment分类
交通工程引用本文复制引用
岑卓伦,刘涛,王磊,窦旭..大型LNG船发电机室的燃气管线泄漏分析[J].中国舰船研究,2017,12(5):109-119,11.
