Abstract
Reynolds number dependence of vortical patterns visualized by smoke technique in accelerating flow behind airfoils is documented in photographic sequences at angles of attack 20° and 60°. At low Reynolds numbers the vortical pattern development is quite simple. With increasing Reynolds numbers these patterns become increasingly complex, and onset of turbulence occurs early and generates large scale turbulent vortex patterns.
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References
Freymuth, P.; Bank, W.; Palmer, M. 1983 a: Use of titanium tetrachloride for visualization of accelerating flow around airfoils. Third International Symposium on Flow Visualization, Sept. 6–9, 1983, Ann Arbor, Preprint volume, 800–805. Flow Visualization, Vol. 3, in preparation
Freymuth, P.; Bank, W.; Palmer, M. 1983 b: Visualization of accelerating flow around an airfoil at high angles of attack. Z. Flugwiss. Weltraumforsch. 7, 392–400
Freymuth, P.; Bank, W.; Palmer, M. 1984: First experimental evidence of vortex splitting. Phys. Fluids 27, 1045–1046
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Freymuth, P., Bank, W. & Palmer, M. Reynolds number dependence of vortex patterns in accelerated flow around airfoils. Experiments in Fluids 3, 109–112 (1985). https://doi.org/10.1007/BF00276717
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DOI: https://doi.org/10.1007/BF00276717