Počet záznamů: 1  

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

  1. 1.
    0522315 - ÚFP 2020 RIV DE eng J - Článek v odborném periodiku
    Jeništa, Jiří - Takana, H. - Nishiyama, H. - Bartlová, M. - Aubrecht, V. - Murphy, A.B.
    Modelling of inhomogeneous mixing of plasma species in argon–steam arc discharge for broad range of operating conditions.
    European Physical Journal D. Roč. 74, č. 2 (2020), č. článku 22. ISSN 1434-6060. E-ISSN 1434-6079
    Grant CEP: GA ČR(CZ) GC17-10246J
    Grant ostatní: GA MŠk(CZ) LM2015085; GA MŠk(CZ) LM2015042
    Institucionální podpora: RVO:61389021
    Klíčová slova: Plasma Physics
    Obor OECD: Fluids and plasma physics (including surface physics)
    Impakt faktor: 1.425, rok: 2020
    Způsob publikování: Omezený přístup
    https://link.springer.com/article/10.1140/epjd/e2019-100254-3

    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.
    Trvalý link: http://hdl.handle.net/11104/0306822

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.