Dissociation–recombination models in hypersonic boundary layer flows

Armenise, I.; Esposito, Fabrizio; Capitelli, M.

doi:10.1016/j.chemphys.2007.05.015

Cited by 46 publications

(29 citation statements)

References 19 publications

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“…(38) and (39) The old TLD corresponds to N 2 +O rate fitting performed by using Eq. (35). As it can be observed, new approach of rate fitting gives much more better agreement with STS, respect to old TLD.…”

Section: Resultssupporting

confidence: 54%

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Reduction of State-to-State to Macroscopic Models for Hypersonics

Bourdon¹,

Annaloro²,

Bultel³

et al. 2014

TOPPJ

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Four different types of macroscopic models developed for the vibration-chemistry coupling in nonequilibrium flows for re-entry applications are presented. First, using an approach based on nonequilibrium thermodynamics, global rate coefficients of dissociation of N 2 and O 2 under parent molecular or atomic impact and backward molecular recombination are determined. Then a Two-Level Distribution (TLD) model is developed, in which a relaxation equation for vibrational temperature is solved as in the case of multi-temperature models but with the simultaneous solution of a kinetic equation, as in the case of state-to-state models, but only for the last vibrational level. In a third approach, a multiinternal temperature model is presented to describe accurately the vibrational distribution function in using several groups of levels, within which the levels are assumed to follow a Boltzmann distribution at an internal temperature of the group. This multi-internal temperature model allows us to describe accurately the vibrational energy relaxation and dissociation processes behind a strong shock wave. Finally, a rovibrational collisional coarse-grain model is developed to reduce a detailed rovibrational mechanism for the internal energy excitation and dissociation processes behind a strong shock wave in a nitrogen flow.

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Section: Resultssupporting

confidence: 54%

“…The vibrational energy diagram of the molecules is taken from [26] and [35]. The cases P ≡ N 2 or N for the dissociation of N 2 and P ≡ O 2 or O for the dissociation of O 2 are treated.…”

Section: Global Rate Coefficients For N 2 and O 2 Dissociation And Rementioning

confidence: 99%

Reduction of State-to-State to Macroscopic Models for Hypersonics

Bourdon¹,

Annaloro²,

Bultel³

et al. 2014

TOPPJ

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“…Therefore when different reactions are considered in the same kinetic scheme, to simulate a certain mixture like air, the re-scaling of the vibrational ladder becomes mandatory, as explained in Ref. [30] for a nitrogen mixture and in Ref. [37] for an oxygen one.…”

Section: Potential Energy Surfaces and Vibrational Energies In The Nomentioning

confidence: 99%

“…For the reader's convenience, in Table 1 also the N 2 vibrational energies at j = 0 calculated in the past for the system N-N-N [29,30] are reported.…”

Section: Potential Energy Surfaces and Vibrational Energies In The Nomentioning

confidence: 99%

N2, O2, NO state-to-state vibrational kinetics in hypersonic boundary layers: The problem of rescaling rate coefficients to uniform vibrational ladders

Armenise

Esposito

2015

Chemical Physics

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“…In this case gas dynamic equations in the Euler or Navier-Stokes approximations are coupled to the equations for vibrational level populations of different chemical species and atomic concentrations. This approach received much attention during two last decades for numerical simulations of different flows of air components such as near re-entering bodies [16,17], behind shock waves [18][19][20], in nozzles [21][22][23][24][25], in a boundary layer [26,27] and in a shock layer near re-entering bodies [28], in a shock tunnel nozzle and behind a shock wave in its test section [29]. However, in the majority of papers only two-component mixtures are considered in the state-to-state flow simulations taking into account vibration-dissociation coupling.…”

Section: Introductionmentioning

confidence: 99%