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 Scopus citations

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
Publication statusPublished - 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

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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