Viscous normal shock solutions including chemical, thermal, and radiative nonequilibrium

Abstract

An existing axisymmetric body viscous shock layer code including thermochemical and thermodynamic nonequilibrium and nonequilibrium radiative gasdynamic coupling was adapted to simulate the one-dimensional flow within a shock tube. A suitable solution scheme for this case and additional radiation modeling were developed in order to compare the current computational results with experimental radiation measurements. Spectrally integrated intensity traces, time to peak radiation, and ionization distance data were generated for shocks in air with speeds between 9.5-12.6 km/s. Using the current model, the dual peak characteristics of Wilson's experimental results are reproduced without the introduction of contaminant radiation. Overall, good agreement is seen between the current calculations and the available experimental data, justifying the use of the current nonequilibrium models for engineering applications.