Effect of internal energy excitation on supersonic blunt-body drag

Graham V. Candler, J. Daniel Kelley

Research output: Contribution to conferencePaper

3 Scopus citations

Abstract

The effect of upstream vibrational energy excitation on supersonic blunt-body drag is studied using computational fluid dynamics. The simulations model recent experiments where a DC or microwave discharge excites the air upstream of a sphere. It is assumed that the discharge weakly dissociates the oxygen and excites the vibrational energy of the diatomics. The computations show that the bow shock standoff distance increases, and the drag on the sphere is found to decrease by as much as 50%. The results are in general agreement with the experiments, indicating that vibrational energy excitation may explain the observed behavior. Preliminary calculations on a streamlined body do not show as large a drag reduction effect.

Original languageEnglish (US)
DOIs
StatePublished - Jan 1 1999
Event37th Aerospace Sciences Meeting and Exhibit, 1999 - Reno, United States
Duration: Jan 11 1999Jan 14 1999

Other

Other37th Aerospace Sciences Meeting and Exhibit, 1999
CountryUnited States
CityReno
Period1/11/991/14/99

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    Candler, G. V., & Kelley, J. D. (1999). Effect of internal energy excitation on supersonic blunt-body drag. Paper presented at 37th Aerospace Sciences Meeting and Exhibit, 1999, Reno, United States. https://doi.org/10.2514/6.1999-418