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Fluctuation measurements in the near wake of a wedge with and without base injection

Lewis, John E. and Behrens, Wilhelm (1969) Fluctuation measurements in the near wake of a wedge with and without base injection. AIAA Journal, 7 (4). pp. 664-670. ISSN 0001-1452. doi:10.2514/3.5184.

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An experimental investigation of the turbulent and transitional near wake of an adiabatic, slender wedge with and without base injection was performed in the Jet Propulsion Laboratory (JPL) supersonic wind tunnel at Mach 4. Two different quantities were measured with a constant current hot-wire anemometer: the mean square fluctuation intensity [f = 0.1 to 80 KC (see Nomenclature)], and the frequency spectrum of the fluctuations (f = 5 to 200 KC, bandwidth Δf = 0.2 KC). The various flow regions of the near wake were identified and the growth and decay of flow fluctuations were determined. The flow fluctuations of the turbulent boundary-layer remnant were found to decay rapidly during the expansion, and the inner shear layers and the reverse flow region, which they bound, were shown to be laminar. Base injection was found to stabilize the near wake and to delay wake transition.

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Additional Information:© 1969 AIAA. Presented as Paper 68-100 at the AIAA 6th Aerospace Sciences Meeting, New York, January 22-24, 1968. Submitted February 5, 1968; revision received August 26, 1968. This work was supported by Advanced Research Projects Agency/Army Missile Command under Contract DA-01-021AMC-13094(Z).
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Advanced Research Projects Agency (ARPA)DA-01-021AMC-13094(Z)
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AIAA Paper68-100
Issue or Number:4
Record Number:CaltechAUTHORS:20170731-130924236
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Official Citation:Fluctuation measurements in the near wake of a wedge with and without base injection. W. BEHRENS and J.E. LEWIS AIAA Journal 1969 7:4, 664-670
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79603
Deposited By: Tony Diaz
Deposited On:01 Aug 2017 19:37
Last Modified:15 Nov 2021 17:49

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