C型LNG船货舱区温度场分析  

Temperature Field Analysis for Type C LNG Carrier's Cargo Hold

作　　者：蒋军[1] 车驰东[1] 陆晟 JIANG Jun;CHE Chi-dong;LU Sheng(Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Merchant Ship Design and Research Institute,Shanghai 201203,China)

机构地区：[1]上海交通大学,上海200240 [2]上海船舶研究设计院,上海201203

出　　处：《船舶与海洋工程》2018年第5期9-14,共6页Naval Architecture and Ocean Engineering

摘　　要：C型液化天然气(Liquefied Natural Gas,LNG)船货舱区的温度场计算通常采用简化一维传热计算方法,计算精度差,难以准确地确定货舱区船体结构温度场分布,从而影响货舱区结构材料级别选取的准确性。对此,根据C型LNG船货舱区的传热特点,介绍基于热传导、热对流和热辐射等3种传热方式的三维有限元温度场计算,并以某3000m^3 C型LNG船为例,比较在极端环境下采用简化传热计算方法和三维有限元传热计算方法得到的计算结果,发现采用三维有限元传热计算方法得到的温度场计算结果可体现整个货舱区各区域的温度场变化,可为准确选取结构材料级别提供依据。The cargo hold temperature field of type C Liquefied Natural Gas （LNG） carrier is often calculated with simplified one-dimension heat transfer method. It is hard to accurately determine the temperature distribution in the hull structures of cargo hold as the method is not so accurate, which often affects the selection of material for the cargo hold structures. This paper introduces the 3D finite element based temperature field calculation method for three types of heat transfer, i.e. heat conduction, heat convection and heat radiation, according to the heat transfer characteristics of type C LNG cargo hold. A 3000m3 type C LNG carrier is taken as the example to compare the calculation results under the extreme conditions respectively from the simplified method and the 3D finite element method. It is found that 3D finite element method can provide the temperature field variations of each region inside the cargo hold, which also provides the basis for accurate selection of structural material.

关 键 词：LNG船 温度场 传热 换热系数 

分 类 号：U674.133.3[交通运输工程—船舶及航道工程]