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Predicting surface wakes using LES and RANS-SST analysis

conference contribution
posted on 2023-05-23, 07:58 authored by Alexander ConwayAlexander Conway, Susantha RanmuthugalaSusantha Ranmuthugala, Jonathan BinnsJonathan Binns
Conventional submarines are required to approach and pierce the surface with vertically mounted appendages such as a periscope or a snorkelling mast. These appendages are typically bluff bodies which can generate a significant wake profile which is susceptible to detection either by radar, sound, or visual sighting. Therefore, more details about the wake profile are required to understand the aspects of it which can be detected and identify any operational and design methods to reduce the risk of detection. This project includes the investigation into the capability of the Large Eddy Simulation (LES) and RANS-SST models within OpenFOAM to accurately replicate such operations. Thus, simulations using LES and RANS-SST were carried out to model the wake profile and fountain height generated by a cylinder under flow rates between 2 to 8 knots, ranging from subcritical to supercritical flow regimes (Re=2.7×104 to Re=4×105). The results were validated against published experimental and numerical data comparing the fountain height, free-surface contours, and variation in velocity signals in the wake. This study has shown the possibility to use LES to model and examine the wake generated by a cylinder allowing further study to be conducted in methods of reducing the risk of detection.

History

Publication title

Proceedings of the 2nd Submarine Science, Technology, and Engineering Conference 2013

Editors

CJ Skinner, GA Morgan

Pagination

337-342

ISBN

978-0-646-91147-2

Department/School

Australian Maritime College

Publisher

Submarine Institute of Australia

Place of publication

ACT, Australia

Event title

2nd Technology Conference 2013 - Science, Technology and Engineering

Event Venue

Adelaide, South Australia

Date of Event (Start Date)

2013-10-15

Date of Event (End Date)

2013-10-17

Rights statement

Copyright 2013 the Authors

Repository Status

  • Restricted

Socio-economic Objectives

Maritime

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    University Of Tasmania

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