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The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Similitude for Normal Shock Waves in Non-Equilibrium Flows

Report Number: AFFDL TR 65-91
Author(s): R. E. Thomas, D. Brooke, S. L. Petrie
Corporate Author: The Ohio State University Research Foundation
Laboratory: Air Force Flight Dynamics Laboratory
Date of Publication: 1965-10
Pages: 50
Contract: AF 33(657)-10416
Project: 1426
Task: 142604
AD Number: AD0627031

Abstract:
Similarity parameters are developed which govern the length of nonequilibrium zones behind normal shock waves. Non-equilibrium effects produced by both vibrational relaxation and dissociation are considered. The parameters can also account for arbitrary levels of free-stream vibrational energy or dissociation level. The validity of the parameters is examined using numerical computations of the properties of the non-equilibrium fields. These computations are made with the aid of experimentally based rate expressions. The parameters, when written in a form describing the variation of non-equilibrium zone length with Mach number, are shown to have acceptable accuracy.

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