Consistent Comparison of Macroscopic and State-to-State Kinetics in Hypersonic Flows

摘要

We present a comparison of numerical results in strongly expanding hypersonic flows that have been obtained using state-to-state and macroscopic thermochemical models. The macroscopic model, which includes direct cross coupling between chemical and vibrational relaxation, has been derived directly from the state-to-state kinetic rates. This makes the comparison the most consistent possible, as differences cannot be ascribed to original discrepancies in the used rates. The comparison is conducted in a N2-N system using the test conditions of the EAST facility nozzle experiment, for which experimental data are available.