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Thermophysical properties of nitrogen plasmas under thermal equilibrium and non-equilibrium conditions
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10.1063/1.3657426
/content/aip/journal/pop/18/11/10.1063/1.3657426
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/11/10.1063/1.3657426

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Temperature dependence of internal partition functions of nitrogen molecular (a) and its ion (b) (straight line and symbols: this work; symbols: the work of Drellishak et al. in Ref. 43).

Image of FIG. 2.
FIG. 2.

Numerical computation flow chart.

Image of FIG. 3.
FIG. 3.

(Color online) Internal partition function of nitrogen atom under different degrees if non-LTE (solid line with symbols: using Debye length from only electrons; dashed line with symbols: Debye length from electrons and ions).

Image of FIG. 4.
FIG. 4.

(Color online) As Fig. 3, but for the monatomic nitrogen ion N+.

Image of FIG. 5.
FIG. 5.

(Color online) Temperature dependence of the number density of different species in nitrogen plasmas under different degrees of non-equilibrium at atmospheric pressure (solid line and symbols: Debye length including only electrons; dashed line and symbols: Debye length including electrons and ions). (a) N2, (b) N, (c) electron, (d) N+, and (e) N++.

Image of FIG. 6.
FIG. 6.

(Color online) Temperature dependence of mass density of nitrogen plasmas under different degrees of non-equilibrium; symbols as in Fig. 5.

Image of FIG. 7.
FIG. 7.

(Color online) Temperature dependence of enthalpy of nitrogen plasmas under different degrees of non-equilibrium (solid line and symbols: this work, Debye length including only electrons; dashed line and symbols: this work, Debye length including electrons and ions; open symbols: Colombo et al. (Ref. 23)).

Image of FIG. 8.
FIG. 8.

(Color online) Temperature dependence of internal energy of nitrogen plasmas under different degrees of non-equilibrium; symbols as in Fig. 5.

Image of FIG. 9.
FIG. 9.

(Color online) Temperature dependence of specific heat at constant pressure of nitrogen plasmas under different degrees of non-equilibrium as Fig. 7. (a) Specific heat of electrons at constant pressure. (b) Specific heat of heavy particles at constant pressure. (c) Total specific heat at constant pressure.

Image of FIG. 10.
FIG. 10.

(Color online) Temperature dependence of electron thermal diffusion coefficients of nitrogen plasmas under different degrees of non-equilibrium; symbols as in Fig. 5.

Image of FIG. 11.
FIG. 11.

(Color online) Temperature dependence of viscosity of nitrogen plasmas under different degrees of non-equilibrium; symbols are as in Fig. 7.

Image of FIG. 12.
FIG. 12.

(Color online) Temperature dependence of total thermal conductivity of nitrogen plasmas in LTE. Straight line and symbols: this work using collision integrals mentioned here; symbols: this work using collision integrals described by Capitelli et al. (Ref. 61) and the work of Murphy and Arundell (Ref. 18).

Image of FIG. 13.
FIG. 13.

(Color online) Temperature dependence of translational thermal conductivity (λtr) of nitrogen plasmas under different degrees of non-equilibrium; symbols are as in Fig. 7.

Image of FIG. 14.
FIG. 14.

(Color online) Temperature dependence of reactive thermal conductivity of nitrogen thermal plasmas under different degrees of non-equilibrium; symbols are as in Fig. 5. (a) Reactive thermal conductivity of electrons. (b) Reactive thermal conductivity of heavy particles. (c) Total reactive thermal conductivity.

Image of FIG. 15.
FIG. 15.

(Color online) Temperature dependence of components of the thermal conductivity of nitrogen plasmas for θ = 3; symbols are as in Fig. 5. λtot: total thermal conductivity; λtrh and λtre: translational components due to heavy particles and electrons. respectively; λre: reactive component; λin: internal component.

Image of FIG. 16.
FIG. 16.

(Color online) Temperature dependence of total thermal conductivity of nitrogen plasmas under different degrees of non-equilibrium; symbols are as in Fig. 5.

Image of FIG. 17.
FIG. 17.

(Color online) Temperature dependence of electrical conductivity of nitrogen plasmas under different degrees of non-equilibrium; symbols are as in Fig. 7.

Image of FIG. 18.
FIG. 18.

(Color online) Influence of pressure on electron mole fraction (a), specific heat at constant pressure (b), electron thermal diffusion coefficients (c), viscosity (d), thermal conductivity (e), and electrical conductivity (f) of nitrogen plasmas under different pressures 0.1 atm, 1 atm, 2 atm, 3 atm, 5 atm, 10 atm for θ = 3, respectively. Symbols are as in Fig. 5.

Tables

Generic image for table
Table I.

Chemical reaction energy changes and the reaction excited temperature.

Generic image for table
Table II.

States of the atoms considered in our calculation of the internal partition function of nitrogen atom.

Generic image for table
Table III.

Parameters for ion-neutral interaction potentials.64

Generic image for table
Table IV.

Internal thermal conductivity and its percentage contribution to the total thermal conductivity, for θ = 10.

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/content/aip/journal/pop/18/11/10.1063/1.3657426
2011-11-11
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thermophysical properties of nitrogen plasmas under thermal equilibrium and non-equilibrium conditions
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/11/10.1063/1.3657426
10.1063/1.3657426
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