Accession Number:

ADA279005

Title:

NEQPAK, The AEDC Thermochemical Nonequilibrium Package -- Theory and Use

Descriptive Note:

Final rept. Oct 1988-Oct 1993

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

Report Date:

1994-04-01

Pagination or Media Count:

97.0

Abstract:

NEQPAK is a set of Fortran 77 routines and databases which are useful in the development and application of nonequilibrium flow solvers. The set includes a library of subroutines for evaluating reaction rates and the thermal and transport properties of high-temperature ionized gases. Thermal nonequilibrium may be treated by applying modules which evaluate the interactions between molecular energy modes. The interactions between vibrational and chemical relaxation may be investigated by using multiple- temperature reaction models or by applying the coupling factors suggested by contemporary theories. A utility for correlating user-supplied reaction data with the material properties database is also provided. Most of the modules are optimized for use on vector-processing machines, and have been designed for the efficient use of memory. The thermal properties database covers the range from 100 to 35,000 K, and the transport properties database extends from 300 to 30, 000 K, and the transport properties database extends from 300 to 30,000 K. This report describes the thermophysical models embodied in NEQPAK and explains how the routines may be incorporated into hypersonic CFD codes

Subject Categories:

  • Computer Programming and Software
  • Fluid Mechanics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE