On the role of longitudinal vortices in turbulent flow over a curved surface

L. M. Cullen, G. Han, M. D. Zhou, Israel J Wygnanski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Experiments were conducted in two turbulent flows with streamline curvature, a convex wall-jet and a concave boundary layer. Two-point spatial crosscorrelation measurements separated in the spanwise direction clearly reveal the existence of large-scale longitudinal vortices in both experiments. Vortex generators (VGs) were used to enhance the streamwise vortices. The streamwise development of spanwise wavelength indicates these structures are related to the centrifugal or Görtler-type instability caused by the curvature. Surface pressure measurements show the vortices influence flow separation, which has implications for the future development of strategies for separation control and mixing enhancement.

Original languageEnglish (US)
Title of host publication1st Flow Control Conference
StatePublished - 2002
Event1st Flow Control Conference 2002 - St. Louis, MO, United States
Duration: Jun 24 2002Jun 26 2002

Other

Other1st Flow Control Conference 2002
CountryUnited States
CitySt. Louis, MO
Period6/24/026/26/02

Fingerprint

Turbulent flow
Vortex flow
Gas generators
Flow separation
Surface measurement
Pressure measurement
Boundary layers
Experiments
Wavelength

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering

Cite this

Cullen, L. M., Han, G., Zhou, M. D., & Wygnanski, I. J. (2002). On the role of longitudinal vortices in turbulent flow over a curved surface. In 1st Flow Control Conference

On the role of longitudinal vortices in turbulent flow over a curved surface. / Cullen, L. M.; Han, G.; Zhou, M. D.; Wygnanski, Israel J.

1st Flow Control Conference. 2002.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cullen, LM, Han, G, Zhou, MD & Wygnanski, IJ 2002, On the role of longitudinal vortices in turbulent flow over a curved surface. in 1st Flow Control Conference. 1st Flow Control Conference 2002, St. Louis, MO, United States, 6/24/02.
Cullen LM, Han G, Zhou MD, Wygnanski IJ. On the role of longitudinal vortices in turbulent flow over a curved surface. In 1st Flow Control Conference. 2002
Cullen, L. M. ; Han, G. ; Zhou, M. D. ; Wygnanski, Israel J. / On the role of longitudinal vortices in turbulent flow over a curved surface. 1st Flow Control Conference. 2002.
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