AIR THERMODYNAMICS

EQAIRS, from NASA Langley Research Center, is a set of FORTRAN 77 routines
for computing the thermodynamic and transport properties of equilibrium
air for temperatures from 100 to 30000 K. EQAIRS computes these properties
over a pressure range of 1.0e-4 to 1.0e2 atm. The properties computed
include enthalpy, total specific heat, compressibility factor, viscosity,
and the total values of thermal conductivity and Prandtl number.

The EQAIRS routines were written in the form of FORTRAN subroutines for
easy adaptation to existing programs. The subroutines are commented and
can be easily modified to suit the user's needs. In an attempt to maintain
generality, a total of six separate subroutines are available for use: 1)
ENTHLPY (specific enthalpy); 2) SPECIFC (total specific heat at constant
pressure); 3) COMPRES (compressibility factor); 4) VISCSTY (viscosity); 5)
CONDUCT (total thermal conductivity; and 6) PRANDTL (total Prandtl
number).

EQAIRS, inventory number LAR-14760, has been successfully implemented on a
DEC VAX series computer running VMS, a Sun4 series computer running SunOS,
and an IBM PC compatible computer running MS-DOS. Sample input/output and
a sample driver program are provided. The standard distribution medium for
EQAIRS is one 5.25 inch 360K MS-DOS format diskette. This program is also
available on a .25 inch streaming magnetic tape cartridge in UNIX tar
format. Program $500; documentation $16.

COSMIC, The University of Georgia
382 East Broad St, Athens, GA 30602-4272
(706) 542-3265;  Fax: (706) 542-4807

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