Kinetic and Continuum Modeling of High-Temperature Air Relaxation

Fully kinetic, vibrationally and continuum solvers with varying model fidelity are used in this work to the high-temperature relaxation of air 7230 15,000 K adiabatic heat baths a hypersonic flow over cylinder. The results show significant impact uncertainties vibrational times reaction rate constants on thermal chemical relaxation, particular, gas temperature species mole fractions. Most notably, these need be reduced for collisions that include nitric oxide. Order-of-magnitude differences oxide dissociation recombination rates have large peak NO fraction immediately behind shock surface-distributed flux, respectively. High-fidelity kinetic approaches found different channels having largest effect fractions temperature: exchange former, latter.