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Passive load control in backward-facing step flow by using chevrons

Nilsson, Johan LU ; Szász, Robert-Zoltán LU ; Austrell, Per Erik LU and Gutmark, Ephraim J. (2016) The International Conference on Jets, Wakes and Separated Flows (ICJWSF2015) In Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015 185. p.223-239
Abstract
The ability of chevrons at the top edge of a backward-facing step to reduce downstream surface pressure fluctuations is investigated numerically. Three different chevron configurations are compared against a baseline case without chevrons. Low frequency reduction in the surface pressure fluctuations is observed for two of the configurations. The chevrons do not appear to have a significant effect on the flow as the mean reattachment length for all configurations is nearly constant and there is only a small increase in streamwise turbulence for one configuration with the other configurations unchanged.
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Serrations, Turbulence, Computational Fluid Dynamics, Backward-Facing Step, Acoustic Fatigue, Chevrons
in
Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015
volume
185
pages
8 pages
conference name
The International Conference on Jets, Wakes and Separated Flows (ICJWSF2015)
external identifiers
  • scopus:84979059398
  • wos:000387431400028
ISBN
9783319306001
DOI
10.1007/978-3-319-30602-5_28
language
English
LU publication?
yes
id
a9b9d80f-0f71-4adb-a88f-cd830da89832 (old id 7990126)
date added to LUP
2015-09-24 11:04:16
date last changed
2017-09-18 11:33:16
@inproceedings{a9b9d80f-0f71-4adb-a88f-cd830da89832,
  abstract     = {The ability of chevrons at the top edge of a backward-facing step to reduce downstream surface pressure fluctuations is investigated numerically. Three different chevron configurations are compared against a baseline case without chevrons. Low frequency reduction in the surface pressure fluctuations is observed for two of the configurations. The chevrons do not appear to have a significant effect on the flow as the mean reattachment length for all configurations is nearly constant and there is only a small increase in streamwise turbulence for one configuration with the other configurations unchanged.},
  author       = {Nilsson, Johan and Szász, Robert-Zoltán and Austrell, Per Erik and Gutmark, Ephraim J.},
  booktitle    = {Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015},
  isbn         = {9783319306001},
  keyword      = {Serrations,Turbulence,Computational Fluid Dynamics,Backward-Facing Step,Acoustic Fatigue,Chevrons},
  language     = {eng},
  pages        = {223--239},
  title        = {Passive load control in backward-facing step flow by using chevrons},
  url          = {http://dx.doi.org/10.1007/978-3-319-30602-5_28},
  volume       = {185},
  year         = {2016},
}