Bow rudder of cavitator attached with a non-symmetric anti-roll fin for strong manoeuvring underwater supercavitating vehicles. (3rd April 2022)

• Record Type: Journal Article
• Authors: Li, Daijin; Chen, Wanyu; Shi, Yazhen; Luo, Kai
• Is Part Of: Ships and offshore structures. Volume 17:Number 4(2022)
• Page Start: 840
• Page End: 851
• Publication Date: 2022-04-03
• Subjects: Supercavitating vehicle -- hydrodynamic layout -- cavitator bow rudder -- non-symmetric anti-roll fin; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2021.1878755
• Languages: English
• ISSNs: 1744-5302

Abstract

ABSTRACT: The hydrodynamic control of strong manoeuvring supercavitating vehicles (SVs) is challenging because unwanted changes in the aft planning contacts may result in destabilising forces and moments. In this paper, the disadvantages of the existing hydrodynamic layout of stern rudders are revealed. A novel hydrodynamic layout was proposed using a non-symmetric anti-roll fin installed to the lower part of a conical cavitator bow rudder to create high agility SVs. The conical cavitator bow rudder with two degrees of freedom in the vertical and horizontal planes was employed to manoeuvre pitch and yaw. Deflecting together with the cavitator, the anti-roll fin generates most of the anti-roll moment. The differential motion between the anti-roll fin and the cavitator provides the small residual moment. Adopting this layout, finless SVs could be designed, and the efficiency of the rudder system was remarkably improved. Simulations of an SV validated the effectiveness of the proposed layout.