风浪失速系数对液化气船EEDI/EEXI的影响分析  

Study on Effect of Weather Factor in the EEDI/EEXI Calculation of Liquefied Petroleum Gas Ship

作　　者：吕烈彪 柳卫东[1] LV Liebiao;LIU Weidong(Jiangnan Shipyard(Group)Co.,Ltd.,Shanghai 201913,China)

机构地区：[1]江南造船(集团)有限责任公司,上海201913

出　　处：《中国造船》2023年第3期125-132,共8页Shipbuilding of China

摘　　要：研究风浪失速系数对市场主流液化气船EEDI/EEXI计算的影响。采用船模试验与CFD计算相结合的方法,分析了3型液化气船的风浪失速系数。该方法计算精度较高,适用于多型液化气船风浪失速系数的计算。研究表明,这3型液化气船的风浪失速系数为0.85~0.90。当考虑风浪失速系数时,液化气船的EEDI/EEXI将增大10%~15%。静水阻力在总阻力中的占比超过60%,风阻和波浪增阻的占比相差很小;随着航速增大,静水阻力的占比将增大,优化静水阻力是改善EEDI/EEXI的有效手段。Effect of weather factor in the EEDI/EEXI calculation of liquefied petroleum gas(LPG)ship was analyzed.Weather factors of three LPG ships were calculated by numerical simulation combined with model tests in a typical sea condition.Accuracy of the simulation is reliable and can be applied to other LPG ships.All the weather factors for three ships were in the range of 0.85 to 0.90.EEDI/EEXI will increase 10%~15%when considering the weather factor.Calm water resistance accounts for over 60%of the total resistance,and the proportion of wind resistance and wave added resistance is roughly same.Percentage of calm water resistance will increase with speed,and optimizing powering performance in calm water is beneficial for EEDI/EEXI.

关 键 词：EEDI/EEXI 风浪失速系数 液化气船 静水阻力 CFD 

分 类 号：U661.313[交通运输工程—船舶及航道工程]