Th. Gogel et al., RADIATION TRANSPORT CALCULATION IN HIGH ENTHALPY ENVIRONMENTS FOR 2-DIMENSIONAL AXISYMMETRICAL GEOMETRIES, Journal of thermophysics and heat transfer, 8(4), 1994, pp. 744-750
A Monte Carlo method to determine radiative source terms and boundary
heat fluxes for generic, two-dimensional axisymmetric geometries was d
eveloped. For the geometrical discretization, curvilinear structured g
rids have to be used. Thus, it is possible to use essentially the same
grid as for the initial flowfield computation. The spectral behavior
of gas radiation was considered as well as thermochemical nonequilibri
um conditions of the medium using the NEQAIR code system. The radiatio
n process is simulated by a large number of energy-carrying bundles em
itted at the appropriate locations, having the appropriate wavelength
and direction of emission. These bundles are then traced on their path
through the computational domain and their spectral absorption behavi
or is calculated. Departing from a given flowfield solution for the co
nsidered geometry, the radiation simulation method is initiated and yi
elds the radiative source terms in an adequate form for coupling with
the energy equations of the flowfield. The iteration is performed in a
loosely coupled manner. A first radiation assessment for the case of
a trajectory point of the ROSETTA-re-entry is presented.