eCite Digital Repository

Effects of appendages on underwater vehicles


Ranmuthugala, SD and Leong, ZQ, Effects of appendages on underwater vehicles, Book of abstracts of the 10th International Research Conference of General Sir John Kotelawala Defence University, 3-4 August 2017, Ratmalana, Sri Lanka, pp. 16. ISBN 978-955-0301-40-9 (2017) [Non Refereed Conference Paper]

PDF (Full Written Paper as part of a Plenary Session)
Pending copyright assessment - Request a copy

PDF (10th International Research Conference proceedings. Paper is in pg 16. )
Pending copyright assessment - Request a copy

Official URL:


Depending on mission requirements, underwater vehicles are designed and configured with a number of appendages. These include appendages for stability and manoeuvring control, sensors, propulsion, payloads, equipment, etc. The collective arrangement of these appendages are generally detrimental to the drag of the vehicle, and in many cases can result in out-of-plane forces that can affect the trajectory and attitude of the vehicle, that in turn can affect its operational capability and safety.

Therefore, when designing underwater vehicles, it is important to identify and quantify the effects from these appendages, and design the vehicle and the appendage configuration to minimise the detrimental effects from these surfaces. Care should also be taken during operations, as the operator should be aware of these effects on the behaviour of the vehicle, especially in non-standard and off-design operational conditions. These include the location of the forward and aft control surfaces on its manoeuvring and propulsion characteristics, effects of the sail on the flow structure around the vehicle, effects of the flow on sensors, etc. Thus, the location and sizing of the appendages are important, although the final configuration is not totally dependent on the hydrodynamic characteristics. This paper provides some guidance on the sizing, locations, and shapes of common appendages on a typical underwater vehicle.

Item Details

Item Type:Non Refereed Conference Paper
Keywords:underwater vehicles, appendages, control planes, hydrodynamics
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Ranmuthugala, SD (Professor Dev Ranmuthugala)
UTAS Author:Leong, ZQ (Dr Zhi Leong)
ID Code:122383
Year Published:2017
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-11-13
Last Modified:2017-11-14

Repository Staff Only: item control page