Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K

Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722292836
Category :
Languages : en
Pages : 82

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A self-consistent set of equilibrium air values were computed for enthalpy, total specific heat at constant pressure, compressibility factor, viscosity, total thermal conductivity, and total Prandtl number from 500 to 30,000 K over a range of 10(exp -4) atm to 10(exp 2) atm. The mixture values are calculated from the transport and thermodynamic properties of the individual species provided in a recent study by the authors. The concentrations of the individual species, required in the mixture relations, are obtained from a free energy minimization calculation procedure. Present calculations are based on an 11-species air model. For pressures less than 10(exp -2) atm and temperatures of about 15,000 K and greater, the concentrations of N(++) and O(++) become important, and consequently, they are included in the calculations determining the various properties. The computed properties are curve fitted as a function of temperature at a constant value of pressure. These curve fits reproduce the computed values within 5 percent for the entire temperature range considered here at specific pressures and provide an efficient means for computing the flowfield properties of equilibrium air, provided the elemental composition remains constant at 0.24 for oxygen and 0.76 for nitrogen by mass. Gupta, Roop N. and Lee, Kam-Pui and Thompson, Richard A. and Yos, Jerrold M. Langley Research Center...

Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K

Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722292836
Category :
Languages : en
Pages : 82

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Book Description
A self-consistent set of equilibrium air values were computed for enthalpy, total specific heat at constant pressure, compressibility factor, viscosity, total thermal conductivity, and total Prandtl number from 500 to 30,000 K over a range of 10(exp -4) atm to 10(exp 2) atm. The mixture values are calculated from the transport and thermodynamic properties of the individual species provided in a recent study by the authors. The concentrations of the individual species, required in the mixture relations, are obtained from a free energy minimization calculation procedure. Present calculations are based on an 11-species air model. For pressures less than 10(exp -2) atm and temperatures of about 15,000 K and greater, the concentrations of N(++) and O(++) become important, and consequently, they are included in the calculations determining the various properties. The computed properties are curve fitted as a function of temperature at a constant value of pressure. These curve fits reproduce the computed values within 5 percent for the entire temperature range considered here at specific pressures and provide an efficient means for computing the flowfield properties of equilibrium air, provided the elemental composition remains constant at 0.24 for oxygen and 0.76 for nitrogen by mass. Gupta, Roop N. and Lee, Kam-Pui and Thompson, Richard A. and Yos, Jerrold M. Langley Research Center...

Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K

Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K PDF Author: Roop N. Gupta
Publisher:
ISBN:
Category :
Languages : en
Pages : 94

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Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30 000 K

Calculations and Curve Fits of Thermodynamic and Transport Properties for Equilibrium Air to 30 000 K PDF Author:
Publisher:
ISBN:
Category : Gases
Languages : en
Pages : 82

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Computer Codes for the Evaluation of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K

Computer Codes for the Evaluation of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 30

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Computer Codes for the Evaluation of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K

Computer Codes for the Evaluation of Thermodynamic and Transport Properties for Equilibrium Air to 30000 K PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722121914
Category :
Languages : en
Pages : 28

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Book Description
The computer codes developed here provide self-consistent thermodynamic and transport properties for equilibrium air for temperatures from 500 to 30000 K over a temperature range of 10 (exp -4) to 10 (exp -2) atm. These properties are computed through the use of temperature dependent curve fits for discrete values of pressure. Interpolation is employed for intermediate values of pressure. The curve fits are based on mixture values calculated from an 11-species air model. Individual species properties used in the mixture relations are obtained from a recent study by the present authors. A review and discussion of the sources and accuracy of the curve fitted data used herein are given in NASA RP 1260. Thompson, Richard A. and Lee, Kam-Pui and Gupta, Roop N. Langley Research Center RTOP 506-40-91-01...

NASA Reference Publication

NASA Reference Publication PDF Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 84

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A Review of Reaction Rates and Thermodynamic and Transport Properties for an 11-species Air Model for Chemical and Thermal Nonequilibrium Calculations to 30000 K

A Review of Reaction Rates and Thermodynamic and Transport Properties for an 11-species Air Model for Chemical and Thermal Nonequilibrium Calculations to 30000 K PDF Author: Roop N. Gupta
Publisher:
ISBN:
Category :
Languages : en
Pages : 92

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A Review of Reaction Rates and Thermodynamic and Transport Properties for an 11-species Air Model for Chemical and Thermal Nonequilibrium Calculations to 30 000 K

A Review of Reaction Rates and Thermodynamic and Transport Properties for an 11-species Air Model for Chemical and Thermal Nonequilibrium Calculations to 30 000 K PDF Author:
Publisher:
ISBN:
Category : Aerothermodynamics
Languages : en
Pages : 108

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NASA Scientific and Technical Publications: A Catalog of Special Publications, Reference Publications, Conference Publications, and Technical Papers, 1991-1992

NASA Scientific and Technical Publications: A Catalog of Special Publications, Reference Publications, Conference Publications, and Technical Papers, 1991-1992 PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 122

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NASA Scientific and Technical Publications

NASA Scientific and Technical Publications PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 134

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