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

Johan Nilsson; Robert-Zoltán Szász; Per Erik Austrell; Ephraim J. Gutmark

doi:10.1007/978-3-319-30602-5_28

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

Johan Nilsson, Robert-Zoltán Szász, Per Erik Austrell, Ephraim J. Gutmark

University of Cincinnati

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

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.

Original language	English
Title of host publication	Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015
Pages	223-239
Number of pages	8
Volume	185
DOIs	https://doi.org/10.1007/978-3-319-30602-5_28
Publication status	Published - 2016
Event	The International Conference on Jets, Wakes and Separated Flows (ICJWSF2015) - Stockholm, Sweden Duration: 2015 Jun 16 → 2015 Jun 18

Conference

Conference	The International Conference on Jets, Wakes and Separated Flows (ICJWSF2015)
Country/Territory	Sweden
City	Stockholm
Period	2015/06/16 → 2015/06/18

Subject classification (UKÄ)

Vehicle Engineering
Aerospace Engineering
Fluid Mechanics and Acoustics

Free keywords

Serrations
Turbulence
Computational Fluid Dynamics
Backward-Facing Step
Acoustic Fatigue
Chevrons

Access to Document

10.1007/978-3-319-30602-5_28

Cite this

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title = "Passive load control in backward-facing step flow by using chevrons",

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.",

keywords = "Serrations, Turbulence, Computational Fluid Dynamics, Backward-Facing Step, Acoustic Fatigue, Chevrons",

author = "Johan Nilsson and Robert-Zolt{\'a}n Sz{\'a}sz and Austrell, {Per Erik} and Gutmark, {Ephraim J.}",

year = "2016",

doi = "10.1007/978-3-319-30602-5_28",

language = "English",

isbn = "9783319306001",

volume = "185",

pages = "223--239",

booktitle = "Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015",

note = "The International Conference on Jets, Wakes and Separated Flows (ICJWSF2015) ; Conference date: 16-06-2015 Through 18-06-2015",

}

Nilsson, J, Szász, R-Z , Austrell, PE & Gutmark, EJ 2016, Passive load control in backward-facing step flow by using chevrons. in Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015. vol. 185, pp. 223-239, The International Conference on Jets, Wakes and Separated Flows (ICJWSF2015), Stockholm, Sweden, 2015/06/16. https://doi.org/10.1007/978-3-319-30602-5_28

Passive load control in backward-facing step flow by using chevrons. / Nilsson, Johan; Szász, Robert-Zoltán ; Austrell, Per Erik et al.
Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015. Vol. 185 2016. p. 223-239.

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

TY - GEN

T1 - Passive load control in backward-facing step flow by using chevrons

AU - Nilsson, Johan

AU - Szász, Robert-Zoltán

AU - Austrell, Per Erik

AU - Gutmark, Ephraim J.

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

KW - Serrations

KW - Turbulence

KW - Computational Fluid Dynamics

KW - Backward-Facing Step

KW - Acoustic Fatigue

KW - Chevrons

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U2 - 10.1007/978-3-319-30602-5_28

DO - 10.1007/978-3-319-30602-5_28

M3 - Paper in conference proceeding

SN - 9783319306001

VL - 185

SP - 223

EP - 239

BT - Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015

T2 - The International Conference on Jets, Wakes and Separated Flows (ICJWSF2015)

Y2 - 16 June 2015 through 18 June 2015

ER -

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

Abstract

Conference

Subject classification (UKÄ)

Free keywords

Access to Document

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Cite this