Development of streamwise counter-rotating vortices in flat plate boundary layer pre-set by leading edge patterns
| Autor: | Seyed Mohammad Hossein Hasheminejad, H. T. Low, S. H. Winoto, Hatsari Mitsudharmadi, Kim Boon Lua |
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| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics 020301 aerospace & aeronautics Leading edge business.industry Mechanical Engineering General Chemical Engineering Trough (geology) Aerospace Engineering Geometry 02 engineering and technology 01 natural sciences 010305 fluids & plasmas Vortex Physics::Fluid Dynamics Boundary layer Wavelength Optics Amplitude 0203 mechanical engineering Nuclear Energy and Engineering Inflection point 0103 physical sciences Development (differential geometry) business |
| Zdroj: | Experimental Thermal and Fluid Science. 86:168-179 |
| ISSN: | 0894-1777 |
| DOI: | 10.1016/j.expthermflusci.2017.03.032 |
| Popis: | 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 15 mm and the same pattern amplitude A of 7.5 mm were examined for free-stream velocity of 3 m/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. |
| Databáze: | OpenAIRE |
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