【摘要】 在LNG船的装载过程中，预冷作为确保舱内设备和围护结构可靠性的关键工艺环节，具有重要作用。以LNG船薄膜型液货舱为研究对象，通过构建二维柱坐标系网格，并采用相似方法对液货舱内流场及壁面温度进行数值模拟。该研究不仅显著提升了计算效率，同时较好地还原了液货舱在预冷过程中温度梯度的演变过程。研究结果表明，应重点关注液货舱舱底中心区域以及舱底与侧面交界处的温度变化；为确保主屏蔽层温度下降梯度处于安全范围内，预冷流量需在特定控制策略下进行精准调节。更多还原

【Abstract】 Precooling the LNG carrier prior to loading is a critical process to ensure the reliability of cargo equipment and enclosure structures. This study investigates membrane LNG carriers by constructing a twodimensional cylindrical mesh using similar methodologies, simulating both the flow distribution within the tank and the enclosure temperature. The calculations not only demonstrate efficient performance but also accurately capture the variations in the temperature gradient. The results highlight the importance of monitoring temperature changes at the center and corners of the bottom. To ensure that the main enclosures cool at a safe gradient, an operational strategy regarding the rate of liquid supply should be carefully considered.更多还原