摘要
基于IGC规范和LPG燃料主机要求,以常见LNG双壁管通风方式为参照,在进风口增加干燥空气源和溢流管设计,以满足防爆负压通风,运用CFD方法,在软件Flowmaster中针对气源流量、温度、溢流管径,以及长度等不同边界条件进行风机仿真模拟,经计算和实船测量验证,风机流量静压曲线与仿真计算数据吻合,参数选型和实际工况点可行,当溢流管为大通径、气源流量略大于风机排量、气源压力微弱高于标准大气压并配合高静压低流量风机,双壁管的负压通风工况趋向良好。
Based on IGC specification and requirements of LPG fuel main engine,the common ventilation mode of LNG double-wall pipe was taken as a reference,the dry air source and overflow pipe are added to the air inlet to meet the explosion-proof negative pressure ventilation.The CFD method was used to simulate the fan in Flowmaster for different boundary conditions such as air source flow rate,temperature,overflow pipe diameter and length,etc.Verified by calculation and test on board,the fan flow static pressure curve was consistent with the simulation data,and the parameter selection and actual working point were feasible.The results showed that when the overflow pipe has large diameter,the air source flow rate is slightly larger than the fan discharge flow-rate,and the air source pressure is slightly higher than the standard atmospheric pressure and is combined with high static pressure and low flow fan,the negative pressure ventilation condition of the double-wall pipe tends to be good.
作者
孙瑞
朱林海
刘建成
赵立玉
张家茂
杜恒
李占鹏
SUN Rui;Zhu Lin-hai;LIU Jian-cheng;ZHAO Li-yu;ZHANG Jia-mao;DU Heng;LI Zhan-peng(China Merchants Heavy Industry(Shenzhen)Co.Ltd.Shenzhen Guangdong 518054,China;Bureau Veritas Marine&offshore china.Guangzhou 510140,China)
出处
《船海工程》
北大核心
2022年第4期75-79,共5页
Ship & Ocean Engineering
关键词
LPG双壁管
负压防爆
负压通风
干燥气源
溢流管
LPG double wall pipe
negative pressure explosion-proof
negative pressure ventilation
dry air source
overflow pipe
