Accession Number : AD0660137

Title :   VIBRATION AND DISSOCIATION COUPLING BEHIND STRONG SHOCK WAVES,

Corporate Author : CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Personal Author(s) : Treanor,Charles E. ; Marrone,Paul V.

Report Date : 1962

Pagination or Media Count : 21

Abstract : The coupling between vibrational relaxation and dissociation is discussed. A model for computations of dissociation behind strong shock waves is presented. It is shown that the loss of vibrational energy during dissociation introduces an inverse temperature dependence into the observed dissociation rate of O2 between 4000 and 8000K. Changing the model so that dissociation from higher vibrational levels is enhanced results in a dissociation-incubation time immediately behind the shock. The vibrational-energy distribution behind the shock is calculated, and shown to depart considerably from a Boltzmann distribution. The molecular model, which uses a Boltzmann distribution, is shown to give the same result as the non-Boltzmann model for both the nonequilibrium dissociation rate and the dissociation incubation time. (Author)

Descriptors :   (*SHOCK WAVES, DISSOCIATION), (*DISSOCIATION, VIBRATION), AERODYNAMIC CHARACTERISTICS, MOLECULAR ENERGY LEVELS, RELAXATION TIME, QUANTUM STATISTICS, RECOMBINATION REACTIONS, THERMODYNAMICS, DISTRIBUTION, OXYGEN, WAKE

Subject Categories : Aerodynamics
      Fluid Mechanics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE