超大型液化石油气船线型优化设计与试验

高玉玲1，陈霞萍1，柳卫东2，陈兵2

(1. 上海船舶运输科学研究所 航运技术与安全国家重点实验室， 上海 200135;

2. 江南造船(集团)有限责任公司， 上海 201913)

摘要:为开发具有国际竞争力的超大型液化石油气船(VLGC)船型，并为我国船厂获得VLGC的订单提供技术支持，基于CFD数值分析对VLGC进行设计吃水状态的线型优化研究。优化的线型波形平缓，船体表面压力分布均匀，艉部桨盘面伴流分布均匀，模型试验结果与CFD计算结果吻合良好。模型试验结果表明，最终优化设计的线型阻力低，能效高，船舶航速指标先进。对开发的新船型进一步开展不同纵倾压载状态的比较试验研究，结果表明，合理地调整压载纵倾值能有效改善压载状态的阻力性能，降低能耗。

关键词:超大型液化石油气船； 线型优化； 计算流体力学； 模型试验

收稿日期：2014-12-05

作者简介：高玉玲(1982—)，女，重庆人，副研究员，硕士，主要从事船舶性能研究。

文章编号：1674-5949(2015)02-015-04

中图分类号：U674.13+3文献标志码：A

Hull form Optimization and Model Tests for a Very Large Gas Carrier

GaoYuling1,ChenXiaping1,LiuWeidong2,ChenBing2

(Shanghai Ship and Shipping Research Institute, State Key Laboratory of Navigation and Safety

Technology, Shanghai 200135, China；Jiangnan Shipyard (Group) Co.,LTD, Shanghai 201913，China)

Abstract:The market of the design and building of Very Large Gas Carrier (VLGC) have been dominated by foreign countries. In order to develop competing hull form to help Chinese shipyards to win VLGC orders on world market, a VLGC hull form is designed and optimized at design draft by means of CFD method and the results show that the optimized lines had flat wave profile, uniform pressure distribution on the hull and uniform wake field on propeller disk astern. The model tests show that the optimized hull form has low resistance and high energy efficiency which agree with the CFD results. The newly developed hull form has a speed index which reaches the world advance level. The hull form design is finalized according to the model test research on different combination of ballast draughts and trims. The research indicates that reasonable ballast can improve the resistance performance, hence, reducing energy consumption.

Key words: VLGC; hull form optimization; Computational Fluid Dynamics; model test

0引言

液化石油气(Liquefied Petroleum Gas, LPG)是天然气生产和原油精炼衍生产品，其运输通常由液化气船来承担。经过半个世纪的发展，液化气船逐渐由小型的全压式液化气船发展到低温、大容量运输为主的半冷半压式和全冷式液化气船。受市场容量和码头设施的限制，近年来液化气船的发展并没有出现更大型化的趋势。但随着液化气海运量逐渐增加，出于航运经济性考虑，中长距离干线运输的液化气船正朝大型化方向发展，超大型全冷式LPG船(Very Large Gas Carrier, VLGC)的发展速度加快，船龄20年以上的老龄船将被淘汰。……