Unsteady CFD simulation of 3D AUV hull at different angles of attack

Unsteady CFD simulation of 3D AUV hull at different angles of attack

Numerical simulation

underwater vehicle

pitch angle

turbulence model

An unsteady, three-dimensional flow simulation is carried out over the bare hull of the autonomous underwater vehicle currently being developed by CSIR-CMERI, Durgapur, India at various angles of attack with the help of a Finite Volume-based CFD software. The purpose of the study is to provide estimation of various hydrodynamic forces acting on the bare hull at different angles of operation. The operating range of velocity of the vehicle is 0-6 knot (0-3 m/s), considering up to 2 knots of upstream current. For the purpose of the CFD simulation, the widely-implemented RANS approach is used, wherein the turbulent transport equations are solved using the low-Re version of the SST ?-? turbulence model. The motion of the vehicle is considered within a range of the pitch angle (0<=alpha<=20). The results are presented in terms of variations of the relevant hydrodynamic parameters. The effects of the angle of attack on the drag and pressure coefficients are discussed in detail.

Ray, Sudipta

Chatterjee, Dipankar

Nandy, Sambhunath

Journal of Naval Architecture and Marine Engineering; Vol. 13 No. 2 (2016); 111-123

2070-8998

1813-8535

Association of Naval Architects and Marine Engineers

2016-12-29

Copyright (c) 2016 Journal of Naval Architecture and Marine Engineering

application/pdf

eng

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

Numerical