RT Journal Article
ID 357afb0327ea3bfb
A1 Pateyron, Bernard
A1 Delluc, Guy
A1 Fauchais, Pierre
T1 FORECAST OF THE CHEMICAL AND TRANSPORT PROPERTIES OF A CARBON-OXYGEN PLASMA IN ISOCHORIC CONDITIONS
JF High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
JO HTM
YR 2011
FD 2012-03-26
VO 15
IS 2
SP 115
OP 122
K1 conductivity
K1 ionization
K1 carbon-oxygen
AB The composition and transport properties of CO2, CO, CH4, CO + Ar, CO + Fe have been calculated at constant volume. Except at low temperature (T < 3,000 K) with the formation of condensed species or more complex molecules, pressure increases with temperature at constant volume. For example, 1 mole of CH4 starting at 0.1 MPa and 298 K can reach 35 MPa at 20,000 K. The net result is a shift to a higher temperature of dissociation and ionization. The electrical conductivity ae at constant volume increases drastically relatively to that obtained at 0.1 MPa over 15,000 K, in spite of the decrease of the electron density ne. The decrease is due to the increase of neutral species ni with a much lower electron-neutral species collision cross section σei (σe is increased proportionally to the inverse of ni*σei). The viscosity always exhibits a maximum when the ionization degree reaches 3% but this maximum is shifted to a higher temperature and its peak value is higher. The thermal conductivity peak due to dissociation is shifted to higher temperature and its value is reduced while the conductivity peak due to ionization, again being shifted to higher temperature, is increased in its value.
PB Begell House
LK https://www.dl.begellhouse.com/journals/57d172397126f956,3f6f76556f45e3c7,357afb0327ea3bfb.html