Abstract No.C171124-067

Author name(s): Yongxu JIANG, Weidong LIU, Tao FAN

Company: Jiangnan Shipyard (Group) Co., Ltd., China

Very Large Gas Carrier (VLGC) is one of the high value-added ship types, which plays an ultimately important role in the LPG market, especially in the shale gas and tight oil development of the U.S. In order to meet the new IGC code requirement, the ship needs fatter shoulder profile. This paper researches the effect of different ship shoulder fullness on the ship resistance. Different shoulder fullness are calculated and analyzed by Shipflow, and the CFD results show that the optimized shoulder with entire fullness has more flat wave profile when uniform pressure distribution on the hull is compared with the original case in the ballast draft. The ship model test results also indicate that the resistance of the optimized case is 0.2% different from the original case under the design draft in calm water, but the resistance of the optimized case in the ballast draft has sharply decreased, which has 5% benefit in the ballast draft than the original case. The CFD result is 1%～2% different from the model test result. The accuracy of resistance meets the engineering demand.

KEY WORDS: shoulder profile; wave profile; pressure distribution

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