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Article Dans Une Revue International Journal of Hydrogen Energy Année : 2019

Numerical study of a nonequilibrium H 2 − O 2 rocket nozzle flow

Abderrahmane Zidane
  • Fonction : Auteur
Rabah Haoui
  • Fonction : Auteur
Zineddine Bouyahiaoui
  • Fonction : Auteur

Résumé

A numerical investigation is conducted to study an H2−O2 rocket nozzle flow in chemical and vibrational nonequilibrium. Therefore, a 9 reactions kinetic model was implemented in our two-temperature house code. The vibrational relaxation times taken from Skrebkov's theoretical model and utilized in our simulations are found to be better suited for the H2−O2 mixture than those evaluated using Millikan & White semi-empiric formula. The utilized 9 reactions kinetic model demonstrates a good modeling of the chemical nonequilibrium. The results show the presence of three regions in propulsive nozzles: an equilibrium region, a nonequilibrium region followed by a return to equilibrium region. Vibrational nonequilibrium effects on flowfield parameters and nozzle performances in fuel-rich flows of H2−O2 rocket are investigated, by comparing this baseline simulation to vibrational equilibrium simulation. Vibrational nonequilibrium effects on flowfield parameters and on nozzle performances are computed and shown to be minor. A reduction of 90% of computation time is observed when using the vibrational equilibrium configuration instead of the vibrational nonequilibrium configuration.
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Dates et versions

hal-01987114 , version 1 (20-01-2019)

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Citer

Abderrahmane Zidane, Rabah Haoui, Mohamed Sellam, Zineddine Bouyahiaoui. Numerical study of a nonequilibrium H 2 − O 2 rocket nozzle flow. International Journal of Hydrogen Energy, 2019, 44 (8), pp.4361--4373. ⟨10.1016/j.ijhydene.2018.12.149⟩. ⟨hal-01987114⟩
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