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Experimental investigation of the effects of base mass addition on the near wake of a slender body

Lewis, John E. and Behrens, Wilhelm and Collins, Donald J. (1970) Experimental investigation of the effects of base mass addition on the near wake of a slender body. In: 8th Aerospace Sciences Meeting. AIAA . https://resolver.caltech.edu/CaltechAUTHORS:20170807-153908350

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Abstract

The near wake of a two-dimensional wedge was studied at Mach 4. Static pressure, Pitot pressure, total temperature, injectant concentration and hot-wire fluctuations were measured. Helium, argon and SF_6 were injected into the base, and their diffusion in laminar and turbulent wakes was studies. The locations of the wake stagnation points as a function of injection rate, and the critical rates required to eliminate the recirculation flow were determined. It was found that the Tear-wake flow with injection does not scale with the mass flux, nor do the momentum or the volume fluxes serve to correlate the data over the entire range of injection. Fluctuation measurements show that SF_6 has a destabilizing effect on the wake, whereas helium has a stabilizing influence, compared to the wake without injection. Model cooling (T_W/T_0∞ = 0.25) resulted in a forward shift of the rear stagnation point and a pronounced decrease in both the velocity defect and the wake width but had a lesser effect on the distribution of the injected species.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.1970-110 DOIArticle
https://arc.aiaa.org/doi/10.2514/6.1970-110PublisherArticle
Additional Information:© 1970 AIAA. This research was supported by the Advanced Research Projects Agency under Contract F04701-69-C-0119 and monitored by SAMSO, Norton Air Force Base, San Bernardino, California.
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Funding AgencyGrant Number
Advanced Research Projects Agency (ARPA)F04701-69-C-0119
Record Number:CaltechAUTHORS:20170807-153908350
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170807-153908350
Official Citation:Experimental investigation of the effects of base mass addition on the near wake of a slender body W. BEHRENS, D. COLLINS, and J. LEWIS 8th Aerospace Sciences Meeting. West Germany
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79872
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Aug 2017 23:09
Last Modified:03 Oct 2019 18:25

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