Accession Number:

ADA007795

Title:

Nonequilibrium Radiation Model for Exhaust Plumes.

Descriptive Note:

Final technical rept. Nov 72-May 74,

Corporate Author:

ULTRASYSTEMS INC IRVINE CALIF

Personal Author(s):

Report Date:

1975-03-01

Pagination or Media Count:

169.0

Abstract:

The objective of this work effort has been to develop a computer code to model nonequilibrium infrared core radiation from rocket plumes. Radiation sources caused by atmospheric interaction are not considered in the model. Because of the number of chemical species, vibrational states, and reaction paths involved, a sophisticated kinetic model is required in any attempt to explain experimental observations of infrared radiation when nonequilibrium processes are important. Such a model is also needed to predict conditions where more conventional thermodynamically based models might be properly applied. In the present study the radiating medium is assumed to be optically thin. Included are a technical discussion of the computer model and a discussion of the method of approach used in implementing the computer model, as well as a step by step description of the computer model. The chemical kinetics model employed in the calculations is described. A complete description of vibrational energy transfer processes, together with a literature survey, is presented. The thermodynamic model which has been developed to allow treatment of the vibrational states of molecules, a discussion of the gas dynamics model, a discussion of the radiation model, and results and conclusions are presented.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE