Abstract
Further experimental results on transition of boundary layer flows in the presence of streamwise counter-rotating Goertler vortices were obtained on concave test surface of 3.0 m radius of curvature. The test surface was mounted in a perspex (plexiglass) curved rectangular section duct connected to a low speed, blow down type, wind tunnel for a free-stream velocity range of 2.0 to 13.1 m/s. Velocity measurements were made using a single sensor hot-wire anemometer and boundary layer flow transitions were detected by a frequency spectrum method. The experimental results show a simple linear relationship between transition start position and free-stream velocity, and lie well between the limit lines of Goertler number transition criteria. It is found that the onset of transition at the flow upwash region occurs when the Goertler number based on the boundary layer momentum thickness reaches a value of about 7.5.
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References
Crane, R. L.; Leoutsakos, G.; Sabzvari J. 1987: Transition in pressure-surfaced boundary layers. ASME J. Turbomach. 109, 296–302
Liepmann, H. W. 1945: Investigation of boundary layer transition on concave walls. NACA Wartime Report, ACR 4J28
Martin, B. W.; Brown, A. 1979: Factors influencing heat transfer to the pressure surfaces of gas turbine blades. Int. J. Heat Fluid Flow 1, 107–114
Riley, S.; Johnson, M. W.; Gibbings, J. C. 1989: Boundary layer transition on strongly concave surfaces. ASME Gas Turbine and Aeroengine Congress and Exposition, Toronto, Ontario, Canada, June 4–8, Paper No. 89-GT-321
Tani, I.; Aihara, Y, 1969: Goertler vortices and boundary layer transition. Z. Angew. Math. Phys. 20, 609–618
Winoto, S. H.; Low, H. T. 1989: Transition of boundary layer flows in the presence of Goertler vortices. Exp. Fluids 8, 41 -47
Zanin, B. Yu. 1984: Transition of natural conditions and comparison with results of wind tunnel studies. In: Laminar-turbulent transition (IUTAM Symposium) (ed. Kozlov, V. V.). pp. 541–546. Berlin, Heidelberg, New York: Springer
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Winoto, S.H., Low, H.T. Transition of boundary layer flows in the presence of Goertler vortices. Experiments in Fluids 10, 281–284 (1991). https://doi.org/10.1007/BF00202461
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DOI: https://doi.org/10.1007/BF00202461