Nonequilibrium recombination after a curved shock wave

Chih-yung Wen, Hans Hornung

Research output: Journal article publicationReview articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

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 analytical solution is obtained with the effective shock values derived by Hornung (1976) [5] 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. A rule of thumb can then be provided to check the validity of binary scaling for experimental conditions and a tool to determine the limiting streamline that delineates the validity zone of binary scaling. The effects on 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 the code of Candler (1988) [10].
Original languageEnglish
Pages (from-to)132-139
Number of pages8
JournalProgress in Aerospace Sciences
Volume46
Issue number2-3
DOIs
Publication statusPublished - 1 Feb 2010
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering
  • Mechanics of Materials

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