Multigroup Correlated-k Distribution Method for Nonequilibrium Atomic Radiation

作者：Bansal Ankit^*; Modest M F; Levin D A

来源：Journal of Thermophysics and Heat Transfer, 2010, 24(3): 638-646.

DOI：10.2514/1.46641

Accurate and efficient modeling of shock-layer radiative heat loads is critical for many spacecraft designs. A correlated-k distribution method has been developed for the most important atomic species (N and O), which provides great accuracy with high numerical efficiency for the evaluation of radiative transfer in a hot plasma. Challenges posed by typical nonequilibrium gas conditions and extreme concentration and temperature gradients in the shock layer were overcome by splitting the full spectrum into a number of nonoverlapping part spectra. Results for one-dimensional nonhomogeneous gas slabs are presented, comparing line-by-line benchmarks with the full-spectrum correlated-k model, showing very good accuracy with a maximum error of 2-3% for the stagnation-line flowfield of the Stardust vehicle and more severe nonhomogeneous two-cell problems.

• 出版日期2010-9