The Modified Marrone-Treanor (MMT) chemical kinetics model  was developed recently using ab-initio quantum chemistry data. The MMT model has been implemented into a CFD code designed for hypersonic flows, with an emphasis on vehicle-scale calculation. The current feature set includes implicit time-stepping, recombination, electronic energy, and performance comparable to the standard Park model. The effect of non-Boltzmann distributions on chemical kinetics source terms are also quantified, and a relatively simple factor is found to be suitable for correcting the reaction rate and vibrational energy change per dissociation. Larger-scale CFD results are also presented and compared to the standard Park model ; the peak heat flux on a Crew Exploration Vehicle (CEV) type geometry is found to be 10% higher for Park than MMT.
|Original language||English (US)|
|Title of host publication||AIAA Scitech 2020 Forum|
|Publisher||American Institute of Aeronautics and Astronautics Inc, AIAA|
|State||Published - 2020|
|Event||AIAA Scitech Forum, 2020 - Orlando, United States|
Duration: Jan 6 2020 → Jan 10 2020
|Name||AIAA Scitech 2020 Forum|
|Conference||AIAA Scitech Forum, 2020|
|Period||1/6/20 → 1/10/20|
Bibliographical noteFunding Information:
This work was sponsored by the Air Force Office of Scientific Research under grants FA9550-16-1-0161 and FA9550-16-1-0291. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the funding agencies or the U.S. Government.