Nonequilibrium plasma flow computation with atomic and molecular state transitions

Yousuke Ogino, Kosuke Totani, Naofumi Ohnishi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A computational code for collisional-radiative rate equations coupled with momentum and energy conservation equations has been developed to study the effects of nonequilibrium atomic and molecular processes on the population densities in an air plasma flowfield. This model consists of fifteen air species: e-, N, N+, N2+, O, O+, O2+, O-, N2, N+ 2, NO, NO+, O2, O+2, and O-2 with their major electronic excited states. Many elementary processes are considered in the number density range of 1012/cm3 ≤ N ≤ 1019/cm3 and the temperature range of 300 K ≤ T ≤ 60,000 K. The state population, the chemical com-position and temperature profiles in a high enthalpy flow condition assuming the Fire II reentry problem are computed. Presented computational results indicated that the amount of radiative intensity emitted from nitrogen atoms has a possibility to be reduced more than 10 % due to the atomic and molecular state transitions.

Original languageEnglish
Title of host publication53rd AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103438
Publication statusPublished - 2015
Event53rd AIAA Aerospace Sciences Meeting, 2015 - Kissimmee, United States
Duration: 2015 Jan 52015 Jan 9

Publication series

Name53rd AIAA Aerospace Sciences Meeting


Conference53rd AIAA Aerospace Sciences Meeting, 2015
Country/TerritoryUnited States


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