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Experimental study on the forcing design for an intermittent injection

Lacagnina, Giovanni; Szász, Robert Zoltán LU ; Prahl Wittberg, Lisa and Fuchs, Laszlo LU (2018) In Experiments in Fluids 59(8).
Abstract

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... (More)

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. Graphical abstract: [Figure not available: see fulltext.].

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Experiments in Fluids
volume
59
issue
8
publisher
Springer
external identifiers
  • scopus:85049526339
ISSN
0723-4864
DOI
10.1007/s00348-018-2574-4
language
English
LU publication?
yes
id
7ad7ba46-1f96-4d6b-8cc6-0d5d1924ea51
date added to LUP
2018-07-20 09:35:27
date last changed
2019-02-20 11:22:42
@article{7ad7ba46-1f96-4d6b-8cc6-0d5d1924ea51,
  abstract     = {<p>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. Graphical abstract: [Figure not available: see fulltext.].</p>},
  articleno    = {123},
  author       = {Lacagnina, Giovanni and Szász, Robert Zoltán and Prahl Wittberg, Lisa and Fuchs, Laszlo},
  issn         = {0723-4864},
  language     = {eng},
  month        = {08},
  number       = {8},
  publisher    = {Springer},
  series       = {Experiments in Fluids},
  title        = {Experimental study on the forcing design for an intermittent injection},
  url          = {http://dx.doi.org/10.1007/s00348-018-2574-4},
  volume       = {59},
  year         = {2018},
}