Development of computational code for atomic and molecular processes in high enthalpy flow

Yousuke Ogino, Naofumi Ohnishi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, a time-dependent collisional-radiative model for air plasma has been developed to study the effects of nonequilibrium atomic and molecular processes on population densities in a weakly ionized high enthalpy flow. This model consists of 15 species: e-, N, N+, N2+, O, O+, O2+, O-, N2, N 2+, NO, NO+, O2, O2 +, and O2- 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 ≤ 40,000 K. We then compute the unsteady nature of pulsively heated air plasma. When the ionization relaxation time is the same order as the time scale of a heating pulse, the effects of unsteady ionization are important for estimating air plasma states.

Original languageEnglish
Title of host publication41st AIAA Plasmadynamics and Lasers Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781600867453
DOIs
Publication statusPublished - 2010 Jan 1

Publication series

Name41st AIAA Plasmadynamics and Lasers Conference

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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