Nonequilibrium recombination after a curved shock wave

Chih-yung Wen, Hans Hornung

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


The effect of nonequilibrium recombination after a curved two-dimensional shock wave in a hypervelocity dissociating flow of an inviscid Lighthill-Freeman gas is considered. An analytic solution is obtained with the effective shock values derived by Hornung (1976) and the assumption that the flow is 'quasi-frozen' after a thin dissociating layer near the shock. The solution gives the expression of dissociation fraction as a function of temperature on a streamline. It can then provide a rule of thumb to check the validity of binary scaling for the experimental conditions and a tool to determine the limiting streamline which delineates the validity zone of binary scaling. The effects upon the nonequilibrium chemical reaction of the large difference in free stream temperature between free-piston shock tunnel and equivalent flight conditions are discussed. Numerical examples are presented and the results are compared with solutions obtained with two-dimensional Euler equations using Candler's code (1988).
Original languageEnglish
Title of host publication39th AIAA Fluid Dynamics Conference
Publication statusPublished - 1 Dec 2009
Externally publishedYes
Event39th AIAA Fluid Dynamics Conference - San Antonio, TX, United States
Duration: 22 Jun 200925 Jun 2009


Conference39th AIAA Fluid Dynamics Conference
Country/TerritoryUnited States
CitySan Antonio, TX

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Aerospace Engineering


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