Publication detail

Modelling of inhomogeneous mixing of plasma species in argon-steam arc discharge for broad range of operating conditions

AUBRECHT, V. BARTLOVÁ, M. JENIŠTA, J. TAKANA, H. NISHIYAMA, H. MURPHY, A.

Original Title

Modelling of inhomogeneous mixing of plasma species in argon-steam arc discharge for broad range of operating conditions

Type

journal article in Web of Science

Language

English

Original Abstract

Numerical simulation of mixing of argon- and water-plasma species in argon-steam arc discharge has been investigated in thermal plasma generator with the combined stabilization of arc by axial gas flow (argon) and water vortex. Mixing process is described by the combined diffusion coefficients method in which the coefficients describe the diffusion of argon "gas", with respect to steam "gas". Calculations for currents 150-600 A with 15-40 standard liters per minute (slm) of argon reveal inhomogeneous mixing of argon and oxygen-hydrogen species with the argon species prevailing near the arc axis. However, calculations for currents higher than 400 A were not straightforward and a phenomenon of premixing of argon and steam species in the upstream discharge region was predicted from modelling to obtain reasonable agreement with experimental data. Premixed argon-steam plasma has a global impact on the plasma jet parameters near the exit nozzle as well as on the overall arc performance. The results of thermo-fluid fields, species mole fractions and radiation losses from the discharge are presented and discussed. Our former calculations based on the homogeneous mixing assumption differ from the present model in temperature, enthalpy, radiation losses, and flow field. Comparison with available experiments exhibits very good qualitative and quantitative agreements for the radial temperature profiles and satisfactory agreement for the velocity profiles 2 mm downstream of the exit nozzle.

Keywords

STABILIZED ELECTRIC-ARC; EFFECTIVE BINARY DIFFUSION; TRANSPORT-COEFFICIENTS; CHARGE-TRANSFER; PARAMETERS; BIOMASS; FLOW; GASIFICATION; PREDICTION; COLLISIONS

Authors

AUBRECHT, V.; BARTLOVÁ, M.; JENIŠTA, J.; TAKANA, H.; NISHIYAMA, H.; MURPHY, A.

Released

4. 2. 2020

Publisher

SPRINGER

Location

ONE NEW YORK PLAZA, SUITE 4600, NEW YORK, NY, UNITED STATES

ISBN

1434-6060

Periodical

European Physical Journal D

Year of study

74

Number

2

State

Federal Republic of Germany

Pages from

1

Pages to

19

Pages count

19

URL

https://link.springer.com/article/10.1140/epjd/e2019-100254-3

BibTex

@article{BUT165813,
  author="Vladimír {Aubrecht} and Milada {Bartlová} and Jiří {Jeništa} and H. {Takana} and H. {Nishiyama} and A. B. {Murphy}",
  title="Modelling of inhomogeneous mixing of plasma species in argon-steam arc discharge for broad range of operating conditions",
  journal="European Physical Journal D",
  year="2020",
  volume="74",
  number="2",
  pages="1--19",
  doi="10.1140/epjd/e2019-100254-3",
  issn="1434-6060",
  url="https://link.springer.com/article/10.1140/epjd/e2019-100254-3"
}