Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/126045
Title: BOUNDARY LAYER ON FLAT PLATE WITH LEADING EDGE PATTERNS
Authors: SEYED MOHAMMAD HASHEMINEJAD
Keywords: Counter-rotating Streamwise Vortices, Laminar Boundary-Layer Flow, Leading Edge Pattern, Flow Visualization, Hot-Wire Anemometry, Force Balance method
Issue Date: 20-Jan-2016
Abstract: THE DEVELOPMENT OF STREAMWISE COUNTER-ROTATING VORTICES IN THE BOUNDARY LAYER OF A FLAT PLATE HAS BEEN EXPERIMENTALLY INVESTIGATED BY MEANS OF SMOKE-WIRE FLOW VISUALIZATION AS WELL AS THE HOT-WIRE ANEMOMETRY. DIFFERENT LEADING EDGE PATTERNS SUCH AS TRIANGULAR, SINUSOIDAL AND NOTCHED PATTERNS WITH IDENTICAL WAVELENGTH AND AMPLITUDE WERE USED TO PRODUCE UNIFORM SIZE VORTICES. IN ADDITION, THE EFFECT OF THE AMPLITUDE AND WAVELENGTH ON THE VORTEX STRUCTURE WAS STUDIED FOR THE TRIANGULAR LEADING EDGE. IT WAS FOUND THAT STREAMWISE COUNTER-ROTATING VORTICES IN THE FORM OF MUSHROOM-LIKE STRUCTURES INITIATED FROM THE TROUGH OF THE PATTERNS. THE NUMBER OF THE PRESET VORTICES WAS EQUAL TO THE NUMBER OF TROUGHS OF EACH PATTERN, EXCEPT FOR THE NOTCHED PLATE. AN ADDITIONAL VORTEX STRUCTURE APPEARED BETWEEN THE MAIN COUNTER-ROTATING VORTICES ON THE NOTCHED PLATE. AN INFLECTION POINT WAS DETECTED ON THE VELOCITY PROFILE AT UPWASH REGION AT THE BEGINNING OF THE VORTEX FORMATION DUE TO THE NON-LINEAR GR
URI: http://scholarbank.nus.edu.sg/handle/10635/126045
Appears in Collections:Ph.D Theses (Open)

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