Development of Streamwise Counter-Rotating Vortices in Flat Plate Boundary Layer Pre-set by Leading Edge Patterns

S.M. Hasheminejad, Hatsari Mitsudharmadi, S.H. Winoto, H.T. Low, K.B. Lua

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Development of streamwise counter-rotating vortices induced by leading edge patterns with different pattern shape is investigated using hot-wire anemometry in the boundary layer of a flat plate. A triangular, sinusoidal and notched patterns with the same pattern wavelength λ of 15mm and the same pattern amplitude A of 7.5mm were examined for free-stream velocity of 3m/s. The results show a good agreement with earlier studies. The inflection point on the velocity profile downstream of the trough of the patterns at the beginning of the vortex formation indicates that the vortices non-linearly propagate downstream. An additional vortex structure was also observed between the troughs of the notched pattern.
Original languageEnglish (US)
Pages (from-to)168-179
Number of pages12
JournalExperimental Thermal and Fluid Science
Volume86
DOIs
StatePublished - Apr 3 2017

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