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

Numerical investigation of a pair of self-propelled AUVs operating in tandem
Numerical investigation of a pair of self-propelled AUVs operating in tandem
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
0029-8018
126-137
Rattanasiri, Pareecha
5e31f120-364f-48fe-a783-a199e21b3689
Wilson, P.A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Phillips, A.B.
f565b1da-6881-4e2a-8729-c082b869028f
Rattanasiri, Pareecha
5e31f120-364f-48fe-a783-a199e21b3689
Wilson, P.A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Phillips, A.B.
f565b1da-6881-4e2a-8729-c082b869028f

Rattanasiri, Pareecha, Wilson, P.A. and Phillips, A.B. (2015) Numerical investigation of a pair of self-propelled AUVs operating in tandem. Ocean Engineering, 100, 126-137. (doi:10.1016/j.oceaneng.2015.04.031).

Record type: Article

Abstract

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

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More information

Published date: 18 April 2015
Organisations: National Oceanography Centre, Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 374509
URI: http://eprints.soton.ac.uk/id/eprint/374509
ISSN: 0029-8018
PURE UUID: 26439104-cd80-4b8e-b354-2df6ac34bf2c
ORCID for P.A. Wilson: ORCID iD orcid.org/0000-0002-6939-682X
ORCID for A.B. Phillips: ORCID iD orcid.org/0000-0003-3234-8506

Catalogue record

Date deposited: 19 Feb 2015 13:28
Last modified: 27 Apr 2022 01:47

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Contributors

Author: Pareecha Rattanasiri
Author: P.A. Wilson ORCID iD
Author: A.B. Phillips ORCID iD

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