The role of vorticity in shock propagation through inhomogeneous media

Kevin Kremeyer, Sergey Nazarenko, Alan C Newell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A 2-D numerical investigation is undertaken of shock wave propagation into a gas with a nonuniform ("V"-shaped) density profile. This geometry results in the steady infusion of vorticity into the gas behind the shock. The generated vorticity is partially contained between the shock and the analogue to the expected lagging contact surface. Comparison to the results of the 1-D case, achieved by averaging over the inhomogeneous medium, shows that the shock in the 2-D case is faster, and has a smaller jump across it in both pressure and density. A density discontinuity analogous to the 1-D contact surface moves slower than in the 1-D case. In fact, it is no longer a true contact surface, in that there is a small pressure rise across it due to the presence of a vortex sheath. The development of a stationary profile immediately behind the shock is also observed. It is emphasized that using a 1-D model to analyse a shock moving through an inhomogeneous medium will, in general, yield erroneous results for both the shock speed and the parameter jumps across the shock. 2-D vortex dynamics provide a key to understanding the observed shock modifications.

Original languageEnglish (US)
Title of host publication37th Aerospace Sciences Meeting and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
StatePublished - 1999
Externally publishedYes
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

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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  • Cite this

    Kremeyer, K., Nazarenko, S., & Newell, A. C. (1999). The role of vorticity in shock propagation through inhomogeneous media. In 37th Aerospace Sciences Meeting and Exhibit [AIAA 99-0871] American Institute of Aeronautics and Astronautics Inc, AIAA.