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Flare-Induced Interaction Lengths in Supersonic, Turbulent Boundary Layers

Roshko, A. and Thomke, G. J. (1976) Flare-Induced Interaction Lengths in Supersonic, Turbulent Boundary Layers. AIAA Journal, 14 (7). pp. 873-879. ISSN 0001-1452. doi:10.2514/3.61429.

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Experimental results are presented for the effects of Mach number, Reynolds number, and corner angle on flare-induced separation of a supersonic, turbulent boundary layer. Measurements were obtained for upstream interaction distance ℓ_0 from the flare to the beginning of the interaction for Mach numbers 2≤M≤4.5, boundary-layer thickness Reynolds numbers 10^5 < R_δ < 10^6, and adiabatic wall conditions. Flares of angle α≤40° were attached to a hollow-cylinder model of 12 in. diam at either x_c= 14 or 18 in. downstream from the sharp leading edge. It was found that ℓ_0/δ_0 decreases with increasing Mach number and Reynolds number and increases with flare angle. For constant α, when ℓ_0/δ_0 is plotted vs the local skin-friction coefficient, C_(f0), the Mach number dependence disappears. From this observation, a simple correlation formula was obtained and used to compare results from other investigations, and also to correlate incipient separation data.

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Additional Information:© 1976 AIAA. Presented as Paper 75-6 at the AIAA 13th Aerospace Sciences Meeting, Pasadena, Calif., Jan. 20-12, 1975; submitted April 1, 1975; revision received March 17, 1976.
Subject Keywords:Boundary Layers and Convective Heat Transfer - Turbulent; Jets, Wakes and Viscid-Inviscid Flow-Interactions; Supersonic and Hypersonic Flow
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AIAA Paper75-6
Issue or Number:7
Record Number:CaltechAUTHORS:20141201-160815389
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Official Citation:A. Roshko and G. J. Thomke. "Flare-Induced Interaction Lengths in Supersonic, Turbulent Boundary Layers", AIAA Journal, Vol. 14, No. 7 (1976), pp. 873-879. doi: 10.2514/3.61429
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52249
Deposited By: George Porter
Deposited On:02 Dec 2014 15:41
Last Modified:10 Nov 2021 19:23

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