AixLib.DataBase.CHP.ModularCHPEngineMedia.CHPCombustionMixtureGasNasa

# .AixLib.DataBase.CHP.ModularCHPEngineMedia.CHPCombustionMixtureGasNasa

Medium model of a mixture of ideal gases based on NASA source

## 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.

## Contents

Name | Description
--- | ---
ThermodynamicState | Thermodynamic state variables
BaseProperties | Base properties (p, d, T, h, u, R, 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

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