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Foundation ::
Chemistry and Thermodynamics ::
EQAIRS
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EQAIRS
Computer Codes for the Evaluation of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K
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SOURCE CODE AVAILABLE
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EQAIRS 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 various properties are calculated through the use of temperature
dependent curve-fits for the pressure range given above. The curve fits are
based on mixture values calculated from an 11-species air model. Individual
species properties used in the mixture relations were obtained from a recent
study by the program authors. It is desirable to have these equilibrium air
properties computed by curve-fits as opposed to tabulated values because
curve-fits generally permit more efficient computation for flow-field
analyses. In addition, for accurate calculations, it is preferable that the
thermodynamic and transport properties be computed in a selfconsistent
manner from the same set of data as in the present case.
EQAIRS carries the NASA case number LAR-14760. It was originally released as part of the NASA COSMIC collection.
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