Numerical prediction of scale effect on propeller bearing force of a four-screw ship

OCEAN ENGINEERING

卷:229

Article

Sun, Shuai¹  Hu, Zhiqiang²  Wang, Chao³  Guo, Zeqing¹  Li, Xiang⁴ 

[1] Nanjing Univ Sci & Technol, Natl Key Lab Transient Phys, Nanjing 210094, Peoples R China

[2] Newcastle Univ, Sch Engn, Marine Offshore & Subsea Technol, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

[3] Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Peoples R China

[4] Hainan Univ, Coll Civil Engn & Architecture, Haikou 570228, Hainan, Peoples R China

关键词: Four-screw ship;    Bearing force;    Scale effect;    Full scale;   

DOI  :  10.1016/j.oceaneng.2021.108974

来源: Elsevier

【 摘 要 】

In case of a four-screw ship, the propellers show different hydrodynamics performance due to the asymmetric distribution of the wake. And the particularity of the scale effect on wake field for this type of ship would make a more complicated characteristics on propeller bearing force. In this paper, a numerical simulation study of scale effect on propeller unsteady bearing force of a four-screw ship was performed by employing RANS method. The load variation of the single-blade is analyzed to understand the fluid mechanism of the interaction between the propeller blade and wake flow. The larger wake field difference between inside and outside propeller disk aggravates the unbalanced load distribution for the full-scale ship. The results of propeller bearing force highlight that the fluctuation values of full-scale ship are smaller than those of model one. Moreover, the scale effect of outside propeller is strong with respect to the inside one. The above findings can provide theoretical guidance for load balancing and vibration reduction of the four-screw ships.

【 授权许可】

Free