On a turbulent mixing layer created downstream of a "λ" notch simulating one wavelength of a chevron nozzle

B. Zakharin, E. Kit, Israel J Wygnanski

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Measurements were carried out in a turbulent mixing layer formed downstream of a splitter plate, that had a Λ-shaped trailing edge. The results revealed that the center of the mixing layer shifts toward the high-speed flow while its sides bend toward the low speed stream at larger distances from the splitter plate. This suggests the existence of a counter rotating streamwise eddies that dominate the flow and substantially increase its level of turbulence relative to the classical plane mixing layer. The change in the orientation of the vorticity, emanating from a chevron nozzle, decreases the susceptibility of the flow to spanwise uniform periodic excitation relative to a classical plane mixing layer.

Original languageEnglish (US)
Pages (from-to)371-388
Number of pages18
JournalFlow, Turbulence and Combustion
Volume83
Issue number3
DOIs
StatePublished - Oct 2009

Fingerprint

turbulent mixing
notches
nozzles
Nozzles
Wavelength
wavelengths
trailing edges
Vorticity
vorticity
low speed
counters
Turbulence
turbulence
high speed
vortices
magnetic permeability
shift
excitation

Keywords

  • Flow control
  • Flow structure
  • Mixing layer
  • Streamwise vortices

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)
  • Chemical Engineering(all)

Cite this

On a turbulent mixing layer created downstream of a "λ" notch simulating one wavelength of a chevron nozzle. / Zakharin, B.; Kit, E.; Wygnanski, Israel J.

In: Flow, Turbulence and Combustion, Vol. 83, No. 3, 10.2009, p. 371-388.

Research output: Contribution to journalArticle

@article{4a17d3c01d294d749242fe3f3299b072,
title = "On a turbulent mixing layer created downstream of a {"}λ{"} notch simulating one wavelength of a chevron nozzle",
abstract = "Measurements were carried out in a turbulent mixing layer formed downstream of a splitter plate, that had a Λ-shaped trailing edge. The results revealed that the center of the mixing layer shifts toward the high-speed flow while its sides bend toward the low speed stream at larger distances from the splitter plate. This suggests the existence of a counter rotating streamwise eddies that dominate the flow and substantially increase its level of turbulence relative to the classical plane mixing layer. The change in the orientation of the vorticity, emanating from a chevron nozzle, decreases the susceptibility of the flow to spanwise uniform periodic excitation relative to a classical plane mixing layer.",
keywords = "Flow control, Flow structure, Mixing layer, Streamwise vortices",
author = "B. Zakharin and E. Kit and Wygnanski, {Israel J}",
year = "2009",
month = "10",
doi = "10.1007/s10494-009-9217-z",
language = "English (US)",
volume = "83",
pages = "371--388",
journal = "Flow, Turbulence and Combustion",
issn = "1386-6184",
publisher = "Springer Netherlands",
number = "3",

}

TY - JOUR

T1 - On a turbulent mixing layer created downstream of a "λ" notch simulating one wavelength of a chevron nozzle

AU - Zakharin, B.

AU - Kit, E.

AU - Wygnanski, Israel J

PY - 2009/10

Y1 - 2009/10

N2 - Measurements were carried out in a turbulent mixing layer formed downstream of a splitter plate, that had a Λ-shaped trailing edge. The results revealed that the center of the mixing layer shifts toward the high-speed flow while its sides bend toward the low speed stream at larger distances from the splitter plate. This suggests the existence of a counter rotating streamwise eddies that dominate the flow and substantially increase its level of turbulence relative to the classical plane mixing layer. The change in the orientation of the vorticity, emanating from a chevron nozzle, decreases the susceptibility of the flow to spanwise uniform periodic excitation relative to a classical plane mixing layer.

AB - Measurements were carried out in a turbulent mixing layer formed downstream of a splitter plate, that had a Λ-shaped trailing edge. The results revealed that the center of the mixing layer shifts toward the high-speed flow while its sides bend toward the low speed stream at larger distances from the splitter plate. This suggests the existence of a counter rotating streamwise eddies that dominate the flow and substantially increase its level of turbulence relative to the classical plane mixing layer. The change in the orientation of the vorticity, emanating from a chevron nozzle, decreases the susceptibility of the flow to spanwise uniform periodic excitation relative to a classical plane mixing layer.

KW - Flow control

KW - Flow structure

KW - Mixing layer

KW - Streamwise vortices

UR - http://www.scopus.com/inward/record.url?scp=70349693784&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70349693784&partnerID=8YFLogxK

U2 - 10.1007/s10494-009-9217-z

DO - 10.1007/s10494-009-9217-z

M3 - Article

AN - SCOPUS:70349693784

VL - 83

SP - 371

EP - 388

JO - Flow, Turbulence and Combustion

JF - Flow, Turbulence and Combustion

SN - 1386-6184

IS - 3

ER -