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Experimental stability studies in wakes of two-dimensional slender bodies at hypersonic speeds

Behrens, W. and Ko, D. R. S. (1971) Experimental stability studies in wakes of two-dimensional slender bodies at hypersonic speeds. AIAA Journal, 9 (5). pp. 851-857. ISSN 0001-1452. doi:10.2514/3.6285.

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Experimental stability studies were conducted in the transition region from laminar to turbulent flow in wakes of slender wedges and a flat plate at Mach number 6. As in low-speed flat plate wakes, transition from laminar to turbulent flow may be divided into a linear and a nonlinear instability region. Inviscid linear stability theory predicts well the growth of fluctuations and amplitude distribution in the linear region. In the nonlinear region similarities with low-speed wakes exist. Characteristic persisting peaks in the power spectra are observed. Based on these peak frequencies a nearly universal Strouhal number of fb_0/u∞ = 0.3 was found for both incompressible and hypersonic wake flows. A theoretical approach to predict the development of mean flow and flow fluctuations in the nonlinear region as employed by Ko, Kubota, and Lees in slender body low-speed wakes appears equally applicable for hypersonic wakes.

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Additional Information:© 1971 AIAA. Received July 10, 1070; revision received November 30, 1970. Research supported by the U.S. Army Research Office and Advanced Research Projects Agency under Contract DA-31-124-ARO(D)-33. It is part of Project DEFENDER sponsored by the Advanced Research Projects Agency. The authors are grateful to L. Lees and T. Kubota for many discussions and helpful suggestions.
Funding AgencyGrant Number
Army Research Office (ARO)UNSPECIFIED
Advanced Research Projects Agency (ARPA)DA-31-124-ARO(D)-33
Issue or Number:5
Record Number:CaltechAUTHORS:20170731-133752887
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Official Citation:Experimental stability studies in wakes of two- dimensional slender bodies at hypersonic speeds W. BEHRENS and D. R. S. KO AIAA Journal 1971 9:5, 851-857
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79609
Deposited By: Tony Diaz
Deposited On:01 Aug 2017 19:37
Last Modified:15 Nov 2021 17:49

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