Accession Number:

AD0295991

Title:

NONEQUILIBRIUM CENTERED EXPANSION OF A DISSOCIATED SUPERSONIC GAS FLOW

Descriptive Note:

Corporate Author:

DOUGLAS AIRCRAFT CO INC SANTA MONICA CA

Personal Author(s):

Report Date:

1962-10-26

Pagination or Media Count:

70.0

Abstract:

A detailed analysis is presented of the nearly frozen, nonequilibrium supersonic expansion of a dissociated diatomic gas around a sharp, two dimensional corner, assuming an incoming stream in dissociation equilibrium. The analysis is based on a small perturbation technique in which small local departures from frozen flow near the corner are treated. The analysis is necessarily restricted in lateral extent but covers the entire angular range of the flow field and, therefore, brings out the nonlinear aspects of the nonequilibrium behavior. An exact analysis is presented in similitude form for a diatomic gas in which numerical procedures are required to effect the solution. However, in the exact solution, the expression for the atomic species mass fraction has been placed in closed form and, in conjunction with appropriate approximations, is used to determine the thermochemical field in an additional solution applicable to hypersonic flow which is approximate but entirely in closed form. Some numerical results for the first order nonequilibrium flow field are presented.

Subject Categories:

  • Theoretical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE