Simulating Stardust Earth Reentry with Radiation Heat Transfer

摘要

A multigroup spectral method is integrated into an interdisciplinary formulation for nonequilibrium radiativenhypersonic flows. The developed simulation capability has been successfully applied to study the Stardust capsulenEarth reentry via an axisymmetric approximation. The predicted total heat transfer rates at different stages ofnreentry achieve a reasonable agreement with results in literature. The computational results reveal a closencorrelation between the relaxation of vibrational excitations and diffusive heat transfer in the wake, as well as andiminished radiative intensity and a shifted emission spectrum in the shock layer toward the lower-frequencyndomain from the earlier to the later stages of the reentry.