不同LNG液舱对晃荡敏感性的数值模拟

发布时间：2018-03-10 23:42

本文选题：LNG船　切入点：液舱　出处：《油气储运》2017年07期 　论文类型：期刊论文

【摘要】：晃荡对LNG船的液舱围护结构具有局部冲击力,不同结构的舱型对晃荡的敏感性不同。利用VOF(Volume of Fluid)流体力学模型对3种主要的LNG船液舱进行了数值模拟,根据不同充满度下液舱受力情况,对3种液舱的优劣以及最佳充满度要求进行分析,结果表明:在晃荡条件下,Membrane型(薄膜型)液舱对充满度的敏感性最大,最佳充满度液面范围为小于10%或大于80%;SPB型(Self-supporting Prismatic Type B)液舱的壁挡板有效地消耗了液体晃荡的能量,具有良好的防晃荡特性;Moss型(球型)液舱晃荡敏感性介于Membrane型与SPB型之间,充满度为50%~70%时受力最大。研究成果对于选择合适的LNG液舱结构形式具有一定的指导意义。
[Abstract]:Sloshing has local impact on the tank enclosure structure of LNG ship, and different cabin types have different sensitivity to sloshing. Three main types of LNG tank are numerically simulated by using VOF(Volume of fluid dynamics model. According to the loading conditions of the tank under different filling degrees, the advantages and disadvantages of the three tanks and the requirements of the best filling degree are analyzed. The results show that the membrane tank is the most sensitive to the filling degree under the sloshing condition. The best filling range of liquid level is less than 10% or greater than 80. The wall baffle of SPB type self-supporting Prismatic Type B tank effectively consumes the energy of liquid sloshing, and has good anti-sloshing characteristics. The sloshing sensitivity of Moss type (spherical) tank is between Membrane type and SPB type. The maximum force is obtained when the filling degree is between 50 and 70. The research results have certain guiding significance for the selection of suitable LNG tank structure.
【作者单位】：东北石油大学;中国石油大学(华东);
【基金】：国家自然基金资助项目“海上混合制冷剂天然气液化过程分离与换热特性研究”,51504278 国家科技重大专项“FLNG/FLPG液化工艺关键技术研究”,2011ZX05026-006-07
【分类号】：TE975

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