Closely Coupled Flowfield-Radiation Interactions During Hypersonic Reentry

摘要

A one-dimensional tangent slab radiative transport solver is developed to model radiation in nonequilibriumnhypersonic flows. The solver is line-by-line accurate and (by making use of attached spectral databases) efficient,nallowing for direct coupling to hypersonic computational fluid dynamics codes. Modifications to the spectralndatabases include a hybrid line-by-line–gray solver and a molecular cross-section method, which is based on thenassumption of a single representative temperature. These modifications decrease computational costs to allow forntight flow coupling hypersonic computational fluid dynamics solvers, but they maintain line-by-line accuracy. Thenradiation code is verified by comparisonwith NEQAIR, an established radiation solver. The solver is then integratedninto the continuum computational fluid dynamics solver DPLR, and coupled simulations are performed for thenflowfields of the Stardust sample return capsule and the Orion crew exploration vehicle.