Thermodynamic properties of ionized gases at high temperatures have been calculated by a new model based on local equilibrium conditions. Calculations have been done for nitrogen, oxygen, air, argon, and helium. The temperature range is 300–100,000 K. Thermodynamic properties include specific heat capacity, density, mole fraction of particles, and enthalpy. The model has been developed using statistical thermodynamics methods. Results have been compared with other researchers and the agreement is good. [DOI: 10.1115/1.4003881]

Thermodynamic Properties of Ionized Gases at High Temperatures

Computation of thermodynamic plasma properties: A simplified approach

Calculation of thermodynamic and transport properties of CO2/N2/O2/Ar system (Martian atmosphere) have been performed in a wide pressure (0.01–100 bar) and temperature range (50–50,000 K). A self-consistent approach for the thermodynamic properties and higher order approximation of the Chapman–Enskog method for the transport coefficients have been used. Debye–Huckel corrections have been included in the calculation of thermodynamic properties while collision integrals derived following a phenomenological approach and accounting also for resonant processes contributions have been used. Moreover, charge–charge interactions have been obtained by using a screened Coulomb potential. Calculated values have been fitted by closed forms ready to be inserted in fluid dynamic codes in order to simulate plasma conditions for different technological applications. Comparison with data present in literature is also reported.

Analytical Expressions of Thermodynamic and Transport Properties of the Martian Atmosphere in a Wide Temperature and Pressure Range

In this work, a simplified method for the evaluation of equilibrium composition of plasmas consisted of monoatomic species is proposed. Multicomponent gas systems resulting from thermal ionization of spatially uniform mixtures are assumed enough rarefied to be treated as ideal gases even after multiple ionization steps. The method developed for the calculation of equilibrium composition of these mixtures makes use of the fundamental principles of statistical physics. Equilibrium concentrations of mixture components are determined by integration of distribution functions over the space of momentum and summation over electronic energy levels. These functions correspond to the entropy maximum. To determine unknown parameters, the systems of equations corresponding to the normalization conditions are derived. It is shown that the systems may be reduced to one algebraic equation if the equilibrium temperature is known. Numeral method to solve this equation is proposed. Special attention is given to the ionized mixtures, generated from the atoms of a single chemical species and the situations, when in the gas only the first- or the first- and second-order ionization are possible.

Simplified method for calculation of equilibrium plasma composition

...................................................................................................................................... I ACKNOWLEDGEMENTS...............................................................................................................II LIST OF CONTENTS .................................................................................................................... IV NOMENCLATURE ....................................... ................................................................................VII LIST OF FIGURES...........................................................................................................................X LIST OF TABLES........................................................................................................................ XIII CHAPTER 1 ......................................................................................................................................

Gas turbine transient performance modeling for engine flight path cycle analysis

Tables of internal partition functions and thermodynamic properties of high-temperature air species from 50 K to 100000 K

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Tables of internal partition functions and thermodynamic properties of high-temperature air species from 50 K to 100000 K