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Experimental study on the forcing design for an intermittent injection

Experimental study on the forcing design for an intermittent injection
Experimental study on the forcing design for an intermittent injection
In this paper we consider the effects of acceleration and deceleration on the forcing of an intermittent jet. This experimental study specifically focuses on the effect of the acceleration and deceleration on the mixing of an intermittent jet with the ambient fluid and on the growth of disturbances that may lead to turbulence. The influence of different injection strategies has been evaluated. The results show that the deceleration phase may be able to contribute significantly to enhance the mixing of the jet with the ambient fluid. This effect is manifested primarily around the tail of the jet, towards the end of injection. The acceleration phase on the other hand has mainly impact at the leading part of the jet, where the leading part of the jet forms a mushroom shaped structure with minor mixing effect.
Intermittent jet, Deceleration phase, Mixing, particle image velocimetry (PIV), Triple decomposition
0723-4864
1-15
Lacagnina, Giovanni
b6c548d0-38b3-4f0f-9f0a-9849cb910113
Szász, Robert-Zoltán
efc46f5a-b8e1-4df7-b38b-67c0f47a4223
Prahl Wittberg, Lisa
b561f451-e14f-4ec1-9950-9275ef022df5
Fuchs, Laszlo
ab907c20-6655-4ded-b6b0-8f490d9564d4
Lacagnina, Giovanni
b6c548d0-38b3-4f0f-9f0a-9849cb910113
Szász, Robert-Zoltán
efc46f5a-b8e1-4df7-b38b-67c0f47a4223
Prahl Wittberg, Lisa
b561f451-e14f-4ec1-9950-9275ef022df5
Fuchs, Laszlo
ab907c20-6655-4ded-b6b0-8f490d9564d4

Lacagnina, Giovanni, Szász, Robert-Zoltán, Prahl Wittberg, Lisa and Fuchs, Laszlo (2018) Experimental study on the forcing design for an intermittent injection. Experiments in Fluids, 59 (8), 1-15, [123]. (doi:10.1007/s00348-018-2574-4).

Record type: Article

Abstract

In this paper we consider the effects of acceleration and deceleration on the forcing of an intermittent jet. This experimental study specifically focuses on the effect of the acceleration and deceleration on the mixing of an intermittent jet with the ambient fluid and on the growth of disturbances that may lead to turbulence. The influence of different injection strategies has been evaluated. The results show that the deceleration phase may be able to contribute significantly to enhance the mixing of the jet with the ambient fluid. This effect is manifested primarily around the tail of the jet, towards the end of injection. The acceleration phase on the other hand has mainly impact at the leading part of the jet, where the leading part of the jet forms a mushroom shaped structure with minor mixing effect.

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Accepted/In Press date: 1 June 2018
e-pub ahead of print date: 3 July 2018
Published date: August 2018
Keywords: Intermittent jet, Deceleration phase, Mixing, particle image velocimetry (PIV), Triple decomposition

Identifiers

Local EPrints ID: 422095
URI: http://eprints.soton.ac.uk/id/eprint/422095
ISSN: 0723-4864
PURE UUID: 983a73e6-814c-4bd3-a34f-ae16cb3d152e
ORCID for Giovanni Lacagnina: ORCID iD orcid.org/0000-0002-8038-1127

Catalogue record

Date deposited: 16 Jul 2018 16:30
Last modified: 16 Mar 2024 06:47

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Contributors

Author: Giovanni Lacagnina ORCID iD
Author: Robert-Zoltán Szász
Author: Lisa Prahl Wittberg
Author: Laszlo Fuchs

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