Nonequilibrium dissociating flow over spheres

H. G. Hornung, Chih-yung Wen

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)


Previous work on the correlation of dissociative non-equilibrium effects on the flow field in the front of blunt bodies considered the dependence of the dimensionless shock stand-off distance on the dimensionless dissociation rate immediately after the normal shock in the simple case of a diatomic gas with only one reaction. In this paper, the correlation is corrected to take into account the additional parameter of the dimensionless free stream kinetic energy, and extended to the case of complex gas mixtures with many species and many reactions, by introducing a new reaction rate parameter that has a clear physical meaning, and leads to an approximate theory for the stand-off distance. Extensive new experimental results and numerical computations of air, nitrogen and carbon dioxide flow over spheres were obtained over a large range of total enthalpy. The results comprise surface heat flux measurements and differential interferograms. Both experimental results and numerical computations substantiate the approximate theory.
Original languageEnglish
Title of host publication33rd Aerospace Sciences Meeting and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Publication statusPublished - 1 Jan 1995
Externally publishedYes
Event33rd Aerospace Sciences Meeting and Exhibit, 1995 - Reno, United States
Duration: 9 Jan 199512 Jan 1995


Conference33rd Aerospace Sciences Meeting and Exhibit, 1995
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering


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