Numerical investigation of a pair of self-propelled AUVs operating in tandem

Rattanasirip, P.; Wilson, P.A.; Phillips, A.B.. 2015 Numerical investigation of a pair of self-propelled AUVs operating in tandem. Ocean Engineering, 100. 126-137. https://doi.org/10.1016/j.oceaneng.2015.04.031

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© 2015 Elsevier B.V. This is the author’s version of a work that was accepted for publication in Ocean Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was/will be published in Ocean Engineering (doi:10.1016/j.oceaneng.2015.04.031)
Revised2_Self-propelled_Jan-10-2015.pdf - Accepted Version
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Abstract/Summary

This paper investigates the influence of the propeller race on upstream and downstream self propelled AUVs. Initially simulations of a self-propelled hull are performed at the Reynolds Number 3.2x10^6 with software commercial RANS code ANSYS CFX 12.1, utilising a body force model to replicate the impact of the propeller utilising momentum source terms. This is then extended to consider a fleet of two self-propelled vehicles operating at a range of longitudinal offset and transverse separations. The results highlight that operation in close proximity to another self-propelled vessel has a significant impact of both the flow around the hull and drag experienced by the vehicle. A propeller race deduction is proposed to account for the increase in vehicle drag due to the propulsors of other vehicles. The propeller race deduction is dependent upon both longitudinal and transverse separation. From a vehicle or mission design perspective, it is important to correctly understand the true propulsive energy budget of the vehicle and its impact on both range and endurance. This study highlights the importance of considering both thrust deduction and any propeller race deductions when calculating the propulsive power consumption of an individual or fleet of vehicles.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1016/j.oceaneng.2015.04.031
ISSN:	0029-8018
NORA Subject Terms:	Marine Sciences
Date made live:	30 Mar 2015 09:23 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/510496

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1016/j.oceaneng.2015.04.031

ISSN:

0029-8018

NORA Subject Terms:

Marine Sciences

Date made live:

30 Mar 2015 09:23 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/510496