Observation of non-chemical equilibrium effect on Ar–CO2–H2 thermal plasma model by changing pressure

Al-Mamun, Sharif Abdullah; Tanaka, Yasunori; Uesugi, Yoshihiko

doi:10.1016/j.tsf.2009.07.185

Cited by 4 publications

(4 citation statements)

References 12 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The co-author Tanaka et al [32][33][34] together with others also established a two-dimensional 1T-NCE model of Ar-N 2 ICTP addressing respective reaction rates for diffusion and convection effects for density distributions. 1T-NCE model for Ar-CO 2 -H 2 ICTP has been also documented [35]. The first 2T-NCE model for Ar-N 2 thermal plasma has been reported by Tanaka et al [36] which addressed 30 chemical reactions (forward and backward) for diffusion and convection terms taking into account.…”

Section: Two-temperature Non-chemical Equilibrium (2t-nce)mentioning

confidence: 98%

“…Thirdly simulation of 2T-NCE model was carried out for reduced pressure (300 and 500 torr) also to see the effect of pressure variation. Fourthly, the Ar-CO 2 -H 2 ICTP simulation is carried out using three different models i.e., the present two-temperature chemically non-equilibrium (2T-NCE) model, a one-temperature chemically equilibrium (1T-CE) model [3] and onetemperature chemically non-equilibrium model (1T-NCE) [35] to examine and thermal and chemical non-equilibrium effects. And finally, the authors present a comparative study of results obtained by three different models and the effects of thermal and chemical nonequilibrium in the Ar-CO 2 -H 2 ICTP are discussed.…”

Section: Two-temperature Non-chemical Equilibrium (2t-nce)mentioning

confidence: 99%

See 1 more Smart Citation

Two-Temperature Two-Dimensional Non Chemical Equilibrium Modeling of Ar–CO2–H2 Induction Thermal Plasmas at Atmospheric Pressure

Al-Mamun

Tanaka

Uesugi

2009

Plasma Chem Plasma Process

Self Cite

View full text Add to dashboard Cite

Here the authors developed a two-dimensional two-temperature chemical nonequilibrium (2T-NCE) model of Ar-CO 2 -H 2 inductively coupled thermal plasmas (ICTP) around atmospheric pressure (760 torr). Assuming 22 different particles in this model and by solving mass conservation equations for each particle, considering diffusion, convection and net production terms resulting from 198 chemical reactions, chemical non-equilibrium effects were taken into account. Species density of each particle or simply particle composition was also derived from the mass conservation equation of each one taking the non chemical equilibrium effect into account. Transport and thermodynamic properties of Ar-CO 2 -H 2 thermal plasmas were self-consistently calculated using the first order approximation of the Chapman-Enskog method at each iteration point implementing the local particle composition and temperature. Calculations at reduced pressure (500 and 300 torr) were also done to investigate the effect of pressure on non-equilibrium condition. Results obtained by the present model were compared with results from one temperature chemical equilibrium (1T-CE) model, one-temperature chemically non equilibrium (1T-NCE) model and finally with 2T-NCE model of Ar-N 2 -H 2 plasmas. Investigation shows that consideration of non-chemical equilibrium causes the plasma volume radially wider than CE model due to particle diffusion. At low pressure with same input power, presence of diffusion is relatively stronger than at high pressure. Comparison of present reactive model with non-reactive Ar-N 2 -H 2 plasmas shows that maximum temperature reaches higher in reactive C-H-O molecular system than non-reactive plasmas due to extra contribution of reaction heat.

show abstract

Section: Two-temperature Non-chemical Equilibrium (2t-nce)mentioning

confidence: 98%

Section: Two-temperature Non-chemical Equilibrium (2t-nce)mentioning

confidence: 99%

Two-Temperature Two-Dimensional Non Chemical Equilibrium Modeling of Ar–CO2–H2 Induction Thermal Plasmas at Atmospheric Pressure

Al-Mamun

Tanaka

Uesugi

2009

Plasma Chem Plasma Process

Self Cite

View full text Add to dashboard Cite

show abstract

“…This difference is associated to the partition function high-order derivative terms in Eqs. (24) and (25). Energy level inclusion in the electronic partition function series based on the self-consistent method as described earlier has a direct and significant impact on thermodynamics properties.…”

Section: Plasma Compositionmentioning

confidence: 99%

“…Air plasma has been in particular attention due to its importance in the aerothermodynamics analysis in re-entry of the spacevehicles into the earth atmosphere [1][2][3][4][5][6][7][8][9][10][11][12][13]. The other plasma mixtures that have been brought under consideration were hydrogen [14][15][16][17][18], helium [19], argon [20][21][22][23], and their mixtures [24,25].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Properties of Pure and Mixed Thermal Plasmas Over a Wide Range of Temperature and Pressure

Askari

2017

Journal of Energy Resources Technology

View full text Add to dashboard Cite

Chemical composition and thermodynamics properties of different thermal plasmas are calculated in a wide range of temperatures (300-100,000 K) and pressures (10 À6 -100 atm). The calculation is performed in dissociation and ionization temperature ranges using statistical thermodynamic modeling. The thermodynamic properties considered in this study are enthalpy, entropy, Gibbs free energy, specific heat at constant pressure, specific heat ratio, speed of sound, mean molar mass, and degree of ionization. The calculations have been done for seven pure plasmas such as hydrogen, helium, carbon, nitrogen, oxygen, neon, and argon. In this study, the Debye-Huckel cutoff criterion in conjunction with the Griem's self-consistent model is applied for terminating the electronic partition function series and to calculate the reduction of the ionization potential. The Rydberg and Ritz extrapolation laws have been used for energy levels which are not observed in tabulated data. Two different methods called complete chemical equilibrium and progressive methods are presented to find the composition of available species. The calculated pure plasma properties are then presented as functions of temperature and pressure, in terms of a new set of thermodynamically self-consistent correlations for efficient use in computational fluid dynamic (CFD) simulations. The results have been shown excellent agreement with literature. The results from pure plasmas as a reliable reference source in conjunction with an alternative method are then used to calculate the thermodynamic properties of any arbitrary plasma mixtures (mixed plasmas) having elemental atoms of H, He, C, N, O, Ne, and Ar in their chemical structure.

show abstract

Thermodynamic Properties of Plasmas

Boulos

Fauchais

Pfender

2023

Handbook of Thermal Plasmas

View full text Add to dashboard Cite

Observation of non-chemical equilibrium effect on Ar–CO2–H2 thermal plasma model by changing pressure

Cited by 4 publications

References 12 publications

Two-Temperature Two-Dimensional Non Chemical Equilibrium Modeling of Ar–CO2–H2 Induction Thermal Plasmas at Atmospheric Pressure

Two-Temperature Two-Dimensional Non Chemical Equilibrium Modeling of Ar–CO2–H2 Induction Thermal Plasmas at Atmospheric Pressure

Thermodynamic Properties of Pure and Mixed Thermal Plasmas Over a Wide Range of Temperature and Pressure

Thermodynamic Properties of Plasmas

Contact Info

Product

Resources

About