Abstract: The cargo containment system of a liquid hydrogen carrier operates at extremely low temperatures, and the hull structures are also exposed to such low temperatures, resulting in a significant temperature gradient. This temperature gradient poses a threat to the safety of both the cargo containment system and the hull structure. This study conducts a temperature field analysis of the hull structure and cargo containment system of a 40 000 m³ liquid hydrogen carrier. The computational fluid dynamics (CFD) method is adopted, considering thermal conduction, thermal convection, and thermal radiation, as well as the thermal coupling effect of the hull structure. A partial cargo hold model is adopted for analysis, which properly reflects the structural arrangement of the cargo hold area and the cargo containment system. The temperature distribution in the cargo holds is analyzed based on the IGC (International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk) and USCG (United States Coast Guard) load cases. The results provide a reference for the design of similar vessels.

Key words: liquid hydrogen carrier, temperature field distribution, computational fluid dynamics (CFD) method, double-layer vacuum insulation

摘要： 液氢运输船的货物围护系统在极低温下工作,船体结构也暴露在低温环境下,易形成较大温度梯度,对货物围护系统和船体结构安全构成威胁。该文以一型40 000 m³液氢运输船为研究对象,对其液货围护系统及其所在的货舱区结构进行温度场分析。采用计算流体力学方法,综合考虑热传导、热对流和热辐射效应,以及货物围护系统的绝缘布置、热学特性和船体结构的热耦合影响。计算中采用局部舱段模型,该模型较好地反映了液氢运输船的货舱区结构布置。计算工况选取基于国际通用规范和美国海岸警卫队特殊要求,最终给出液氢运输船货舱区域（包含液氢货物围护系统）的温度场分布,为相关船型的研发提供参考依据。

关键词: 液氢运输船, 温度场分布, 计算流体力学方法, 双层真空绝缘