Publication de 6 numéros par an
ISSN Imprimer: 1948-2590
ISSN En ligne: 1948-2604
INFLUENCE OF THE PLATE LEADING-EDGE SHAPE AND THICKNESS ON THE BOUNDARY LAYER LAMINAR-TURBULENT TRANSITION IN HYPERSONIC FLOW
RÉSUMÉ
The results of an experimental study on the laminar-turbulent transition in the boundary layer on a blunted plate with a leading edge of various shapes and thicknesses at freestream Mach number M∞ = 5 and unit Reynolds numbers Re1 from 1.5 to 9 × 107 m-1 are presented. The Reynolds number Reb, based on the leading edge thickness b, was varied from 0 to 2 × 106. The following leading edge shapes were studied: cylinder, flat face, ellipse, and smoothened cylinder. In general, it was shown that for Reb < 0.5 × 105, the leading edge shape did not affect the transition location. For higher values of Reb, variations of the leading-edge shape significantly changed the transition location. For all of the shapes considered, a transition reversal was observed. It was shown that the length of the laminar run on a flat plate could be increased by a rational choice of the bluntness shape and thickness.
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Borovoy Volf Y., Radchenko Vladimir N., Aleksandrov Sergey V., Mosharov Vladimir E., Laminar–Turbulent Transition Reversal on a Blunted Plate with Various Leading-Edge Shapes, AIAA Journal, 2021. Crossref
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