Complex Effects of Free Stream Turbulence and Surface Roughness on the Transitional Intermittency

  • Ondrej Hladik
  • Pavel Jonas
  • Oton Mazur
  • Vaclav Uruba
Keywords: by-pass transition, rough wall boundary layer, CTA anemometry, instantaneous wall friction, intermittency analysis

Abstract

The comparison of transitional intermittency distributions in boundary layers on smooth and rough surface is presented. The conditional analysis of the instantaneous wall friction is applied on time records made in transitional boundary layers originating on smooth surface or surface covered by sand paper. Special procedures of measurement and evaluation are applied that allowed evaluations of turbulent and nonturbulent zone averages.

Author Biographies

Ondrej Hladik

Institute of Thermomechanics AS CR, v.v.i., Praha, Czech Republic

Pavel Jonas

Institute of Thermomechanics AS CR, v.v.i., Praha, Czech Republic

Oton Mazur

Institute of Thermomechanics AS CR, v.v.i., Praha, Czech Republic

Vaclav Uruba

Institute of Thermomechanics AS CR, v.v.i., Praha, Czech Republic

Published
2012-12-31
How to Cite
Hladik, O., Jonas, P., Mazur, O., & Uruba, V. (2012). Complex Effects of Free Stream Turbulence and Surface Roughness on the Transitional Intermittency. Communications - Scientific Letters of the University of Zilina, 14(4A), 47-52. Retrieved from http://journals.uniza.sk/index.php/communications/article/view/791
Issue
Vol 14 No 4A (2012)
Section
Articles