Abstract
A full three-dimensional photon Monte Carlo radiative transport solver, named StaRad, is developed to calculate thermal radiative heat flux and infrared signatures within equilibrium and nonequilibrium hypersonic flows. The code is developed to investigate arbitrary thermal radiative transport and is line-by-line accurate. The solver makes use of a ray plane tracing scheme. It can be used in combination with different spectral databases, such as NEQAIR, Plasma Radiation Database, or High Resolution Transmission (HITRAN)/HITEMP Radiation Database. Furthermore, it is developed to be coupled with a continuum fluid flow solver code for coupled computations. For this investigation, uncoupled computations will be presented. A validation with a reference method is presented. Because three-dimensional computation of radiative transport is time consuming, differences are investigated between piecewise one-dimensional and full three-dimensional computations. This is especially important for infrared signatures, as well as in the case of a detailed thermal protection design. This computational method can be efficiently used on a general-purpose graphical processing unit; hence, an overview of its benefits and computational speedup is given.
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