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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F20%3APU137645" target="_blank" >RIV/00216305:26220/20:PU137645 - isvavai.cz</a>

Alternative codes found

RIV/61389021:_____/20:00522315

Result on the web

<a href="https://link.springer.com/article/10.1140/epjd/e2019-100254-3" target="_blank" >https://link.springer.com/article/10.1140/epjd/e2019-100254-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjd/e2019-100254-3" target="_blank" >10.1140/epjd/e2019-100254-3</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

European Physical Journal D

ISSN

1434-6060

e-ISSN

1434-6079

Volume of the periodical

74

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

19

Pages from-to

1-19

UT code for WoS article

000513232300003

EID of the result in the Scopus database

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