title: Non-equilibrium vibrational and chemical kinetics in air flows in nozzles
metadata.name: dc.contributor.author
metadata.value: Nagnibeda, Ekaterina A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Papina, Ksenia V.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2018-07-12T19:43:19Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2018-07-12T19:43:19Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2018-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Nagnibeda E.A., Papina К.V. Non-equilibrium vibrational and chemical kinetics in air flows in nozzles. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 2018, vol. 5 (63), issue 2, pp. 287–299.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: 10.21638/11701/spbu01.2018.209
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/10406
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Quasi-one-dimensional non-equilibrium nozzle flows of reacting air mixture N2/O2/NO/N/O
  are studied on the basis of state-to-state description for vibrational and chemical kinetics.
  Zeldovich exchange reactions of NO formation, dissociation, recombination and various
  vibrational energy transitions are taken into account. The equations for vibrational level
  populations of N2 and O2 molecules are coupled to the conservation equations of impulse
  and total energy and solved numerically for different conditions in a nozzle throat. The
  vibrational spectra of molecules are simulated on the basis of anharmonic Morse oscillator.
  Three nozzle profiles are considered. The variation of vibrational distributions of nitrogen
  and oxygen molecules, number densities of species and the gas temperature along a
  nozzle axis are studied.
  Formation of non-equilibrium non-Boltzmann distributions of N2 and O2 molecules
  with a plateau part at intermediate vibrational levels is shown for different conditions
  in a throat. Level populations of N2 and O2 molecules obtained in the most accurate
  state-to-state approximation are compared with ones found using one-temperature thermal
  equilibrium approach. The underestimated vibrational level populations are obtained in
  the frame of the one-temperature simplified kinetic model for considered conditions.
  Three kinetic models are used for Zeldovich exchange reactions of NO formation. The
  influence of exchange reaction models, throat conditions and a nozzle profile on the gas
  temperature and vibrational distributions are also studied in the paper.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: Работа выполнена при поддержке СПбГУ (проект № 6.37.206.2016) и РФФИ (грант № 15-01-02373).
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Mathematics. Mechanics. Astronomy;Volume 5(63); Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: nozzle flows
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: non-equilibrium kinetics
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: state-to-state approach
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: exchange reactions
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Non-equilibrium vibrational and chemical kinetics in air flows in nozzles
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 09-Nagnibeda.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/10406/1/09-Nagnibeda.pdf
resources.format: Adobe PDF
resources.size: 502,49 kB