Calculation of radiation attenuation in particle-laced flows using a coupled approach

摘要

An Eulerian particle model is coupled with a Navier-Stokes computational fluid dynamics code to data-parallel line relaxation (DPLR) simulate flows with spallation products from thermal protection systems (TPS). Loose-coupling between the two codes is achieved via momentum and energy source terms that arise as the result of drag and heat transfer. Additionally, an approximate model for the scattering and emission of radiation by the particles is developed. The methodology is applied to a simulation of an experiment the Interaction Heating Facility (IHF) arc-jet at NASA Ames Research Center. Initial results from the simulations show promising qualitative similarity to the fluid mechanics and spectral results. The capability developed is essential for subsequent prediction of particle ejection rates and densities to reproduce attenuation of spectroscopic data observed in the experiment.