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Laminar-turbulent transition in the boundary layer on cones in a hypersonic flow at high Reynolds numbers per meter
Authors:A. A. Vasil’ev  V. N. Rychkov  M. E. Topchiyan
Affiliation:(1) Lavrent’ev Institute of Hydrodynamics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090;(2) Novosibirsk State University, Novosibirsk, 630090
Abstract:The laminar-turbulent transition is experimentally studied in boundary-layer flows on cones with a rectangular axisymmetric step in the base part of the cone and without the step. The experiments are performed in an A-1 two-step piston-driven gas-dynamic facility with adiabatic compression of the working gas with Mach numbers at the nozzle exit M = 12–14 and pressures in the settling chamber P0 = 60–600 MPa. These values of parameters allow obtaining Reynolds numbers per meter near the cone surface equal to Re 1e = (53–200) · 106 m −1. The transition occurs at Reynolds numbers Re tr = (2.3–5.7) · 106. __________ Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 48, No. 3, pp. 76–83, May–June, 2007.
Keywords:hypersonic flow  flow around a cone  laminar-turbulent transition  high Reynolds numbers
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