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Thrust depletion at high pulsation frequencies in underactuated, soft-bodied, pulsed-jet vehicles

Thrust depletion at high pulsation frequencies in underactuated, soft-bodied, pulsed-jet vehicles
Thrust depletion at high pulsation frequencies in underactuated, soft-bodied, pulsed-jet vehicles
In this paper we examine the passive stage in the propulsive cycle of a soft-bodied, pulsed-jet, underwater vehicle and its effect on the resultant thrust. This vehicle consists of an elastic shell which propels itself via the discontinuous expulsion and ingestion of finite slugs of ambient water, resulting in a pulsated routine. The activation routine involves the collapse of the elastic shell via cable transmission and its subsequent passive inflation driven by the elastic energy stored in the strained shell walls. Earlier analysis by the authors have found that the thrust generated at each pulsation depends massively on the resilience of the elastic material which composes the shell. In order to improve the design of these vehicle it is thus necessary to characterize the dynamic behaviour of the elastic shell during its stage of inflation by resorting to a coupled potential flow-elastodynamics model. The results enable to better parametrize the thrust model so far employed for this kind of vehicles and in this way achieve a more rigorous description of the vehicle dynamics for design and control purposes.
Giorgio-Serchi, Francesco
8571dc14-19c1-4ed1-8080-d380736a6ffa
Renda, Federico
495810c0-7ec1-4d22-a099-1cfe208aba95
Calisti, Marcello
0dd96ff5-9ce9-4dbe-b71b-c1d4b958b4c2
Laschi, Cecilia
302c8a64-0ba9-4d5c-9d6f-efcfd4acc64a
Giorgio-Serchi, Francesco
8571dc14-19c1-4ed1-8080-d380736a6ffa
Renda, Federico
495810c0-7ec1-4d22-a099-1cfe208aba95
Calisti, Marcello
0dd96ff5-9ce9-4dbe-b71b-c1d4b958b4c2
Laschi, Cecilia
302c8a64-0ba9-4d5c-9d6f-efcfd4acc64a

Giorgio-Serchi, Francesco, Renda, Federico, Calisti, Marcello and Laschi, Cecilia (2015) Thrust depletion at high pulsation frequencies in underactuated, soft-bodied, pulsed-jet vehicles. Oceans 2015, Genova, Italy. 17 - 20 May 2015. 6 pp . (doi:10.1109/OCEANS-Genova.2015.7271369).

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper we examine the passive stage in the propulsive cycle of a soft-bodied, pulsed-jet, underwater vehicle and its effect on the resultant thrust. This vehicle consists of an elastic shell which propels itself via the discontinuous expulsion and ingestion of finite slugs of ambient water, resulting in a pulsated routine. The activation routine involves the collapse of the elastic shell via cable transmission and its subsequent passive inflation driven by the elastic energy stored in the strained shell walls. Earlier analysis by the authors have found that the thrust generated at each pulsation depends massively on the resilience of the elastic material which composes the shell. In order to improve the design of these vehicle it is thus necessary to characterize the dynamic behaviour of the elastic shell during its stage of inflation by resorting to a coupled potential flow-elastodynamics model. The results enable to better parametrize the thrust model so far employed for this kind of vehicles and in this way achieve a more rigorous description of the vehicle dynamics for design and control purposes.

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Published date: 18 May 2015
Venue - Dates: Oceans 2015, Genova, Italy, 2015-05-17 - 2015-05-20
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 395559
URI: http://eprints.soton.ac.uk/id/eprint/395559
PURE UUID: 3c87a680-5739-49e3-b658-9045ca44dfb9
ORCID for Francesco Giorgio-Serchi: ORCID iD orcid.org/0000-0002-5090-9007

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Date deposited: 06 Jun 2016 15:53
Last modified: 08 Jan 2022 03:31

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Contributors

Author: Francesco Giorgio-Serchi ORCID iD
Author: Federico Renda
Author: Marcello Calisti
Author: Cecilia Laschi

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