packageMixtureGasNasa

Information

This model calculates the medium properties for single component ideal gases.

Sources for model and literature:
Original Data: Computer program for calculation of complex chemical equilibrium compositions and applications. Part 1: Analysis Document ID: 19950013764 N (95N20180) File Series: NASA Technical Reports Report Number: NASA-RP-1311 E-8017 NAS 1.61:1311 Authors: Gordon, Sanford (NASA Lewis Research Center) Mcbride, Bonnie J. (NASA Lewis Research Center) Published: Oct 01, 1994.

Known limits of validity:
The data is valid for temperatures between 200 K and 6000 K. A few of the data sets for monatomic gases have a discontinuous 1st derivative at 1000 K, but this never caused problems so far.

This model has been copied from the ThermoFluid library. It has been developed by Hubertus Tummescheit.

Parameters

Contents

Name	Description
ThermodynamicState	Thermodynamic state variables
BaseProperties	Base properties (p, d, T, h, u, R_s, MM, X, and Xi of NASA mixture gas
setState_pTX	Return thermodynamic state as function of p, T and composition X
setState_phX	Return thermodynamic state as function of p, h and composition X
setState_psX	Return thermodynamic state as function of p, s and composition X
setState_dTX	Return thermodynamic state as function of d, T and composition X
setSmoothState	Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b
pressure	Return pressure of ideal gas
temperature	Return temperature of ideal gas
density	Return density of ideal gas
specificEnthalpy	Return specific enthalpy
specificInternalEnergy	Return specific internal energy
specificEntropy	Return specific entropy
specificGibbsEnergy	Return specific Gibbs energy
specificHelmholtzEnergy	Return specific Helmholtz energy
h_TX	Return specific enthalpy
h_TX_der	Return specific enthalpy derivative
gasConstant	Return gasConstant
specificHeatCapacityCp	Return specific heat capacity at constant pressure
specificHeatCapacityCv	Return specific heat capacity at constant volume from temperature and gas data
MixEntropy	Return mixing entropy of ideal gases / R
s_TX	Return temperature dependent part of the entropy, expects full entropy vector
isentropicExponent	Return isentropic exponent
velocityOfSound	Return velocity of sound
isentropicEnthalpyApproximation	Approximate method of calculating h_is from upstream properties and downstream pressure
isentropicEnthalpy	Return isentropic enthalpy
gasMixtureViscosity	Return viscosities of gas mixtures at low pressures (Wilke method)
dynamicViscosity	Return mixture dynamic viscosity
mixtureViscosityChung	Return the viscosity of gas mixtures without access to component viscosities (Chung, et. al. rules)
lowPressureThermalConductivity	Return thermal conductivities of low-pressure gas mixtures (Mason and Saxena Modification)
thermalConductivity	Return thermal conductivity for low pressure gas mixtures
isobaricExpansionCoefficient	Return isobaric expansion coefficient beta
isothermalCompressibility	Return isothermal compressibility factor
density_derp_T	Return density derivative by pressure at constant temperature
density_derT_p	Return density derivative by temperature at constant pressure
density_derX	Return density derivative by mass fraction
molarMass	Return molar mass of mixture
T_hX	Return temperature from specific enthalpy and mass fraction
T_psX	Return temperature from pressure, specific entropy and mass fraction
specificEntropyOfpTXprotected	Return specific entropy from pressure, temperature and mass fractions