Session: 06-12-01 Ship Hydromechanics I

Paper Number: 102431

102431 - Numerical Study on the Hydrodynamic Characteristics of a Small High-Speed Craft 

Small high-speed crafts cannot resist adverse waves by using their displacement compared with large-displacement ships. In order to improve their ability to execute tasks in waves, a concept of a small high-speed craft, the shuttle vessel (SV-SJTU) is proposed by Shanghai Jiao Tong University. It is a revolution in hull design for small high-speed crafts operating in heavy sea conditions, for it adopts angle freeboard to control hull wetness at high speeds and takes advantage of the slim wave-piercing design which produces small lift force.

Validated CFD methods were employed to calculate hull resistances and motions. The SV-SJTU is tested in the numerical towing tank based on CFD in the model scale of 1/6. Hull resistances and motions were predicted by solving the URANS equations and using the overset mesh technology. The turbulence was modeled with the Reynolds-averaged Navier–Stokes equations closed by the SST k-ω turbulence model. The VOF method is utilized to capture the complicated free surface.

Hence, the resistances and hull motions of SV-SJTU in calm water and waves at different speeds were obtained. With satisfying running attitudes and small resistances in calm water, the SV-SJTU experiences soft motions in harmful sea conditions at high speeds without slamming or instantaneous large acceleration, which is different from planing hulls. Accordingly, the concept of a small high-speed craft that performs well in calm water and maintains in waves for soft motions at adverse sea conditions is validated. With the inspirations, further research on the optimal design of the SV-SJTU is expected.

Presenting Author: Huizi Lv Shanghai Jiao Tong University

Presenting Author Biography: Huizi Lv (1995-), Female, Ph.D. Candidate
School of Naval Architecture, Ocean and Civil Engineering
Shanghai Jiao Tong University
Shanghai, P. R. China
tel: +86 15623951129
email: lvhuiz@sjtu.edu.cn

Authors:

Huizi Lv Shanghai Jiao Tong University
Chengzhu Wei China Ship Development and Design Center (Shanghai)
Xiaofeng Liang Shanghai Jiao Tong University
Hong Yi Shanghai Jiao Tong University