The Effect of Recombination Rate on the Flow of a Dissociating Diatomic Gas PDF Download
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Author: Thomas P. Anderson
Publisher:
ISBN:
Category : Gas dynamics
Languages : en
Pages : 224
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Book Description
The flow of a chemically reacting gas through a divergent nozzle is considered. A pure diatomic gas is assumed to dissociate and recombine according to seven distinct recombination rate laws. The effect of correcting Lighthill's ideal dissociating gas for vibrational contributions of the molecular species and translational contributions of the atomic species is shown to be small. The effect of recombination rate on the flow of oxygen, from throat conditions of 2 atm and 4050 K, is shown to be significant for reaction rates decreasing with temperature and relatively unimportant for reaction rates increasing with temperature. Electronic analog computer solutions are presented for a variety of throat compositions and recombination rates. (Author).
Author: Thomas P. Anderson
Publisher:
ISBN:
Category : Gas dynamics
Languages : en
Pages : 224
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Book Description
The flow of a chemically reacting gas through a divergent nozzle is considered. A pure diatomic gas is assumed to dissociate and recombine according to seven distinct recombination rate laws. The effect of correcting Lighthill's ideal dissociating gas for vibrational contributions of the molecular species and translational contributions of the atomic species is shown to be small. The effect of recombination rate on the flow of oxygen, from throat conditions of 2 atm and 4050 K, is shown to be significant for reaction rates decreasing with temperature and relatively unimportant for reaction rates increasing with temperature. Electronic analog computer solutions are presented for a variety of throat compositions and recombination rates. (Author).
Author:
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ISBN:
Category :
Languages : en
Pages : 394
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Category : Industrial arts
Languages : en
Pages : 1118
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Author:
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ISBN:
Category : Computers
Languages : en
Pages : 488
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Author:
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ISBN:
Category : Gas dynamics
Languages : en
Pages : 268
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Author:
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ISBN:
Category : Science
Languages : en
Pages : 1200
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Author: Defense Documentation Center (U.S.)
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Category : Technology
Languages : en
Pages : 464
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Author:
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Category : Aeronautics
Languages : en
Pages : 328
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Author: Franz Hindelang
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ISBN:
Category : Carbon dioxide
Languages : en
Pages : 44
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Book Description
The harmonic oscillator rigid-rotator model has been used to calculate the relaxation region behind a shock wave in carbon dioxide. Finite relaxation rates for the three different vibrational modes and two dissociation reactions are included. Models for the coupling between the vibrational relaxation and the dissociation process are based on the assumption that dissociation can proceed from any vibrational level with equal probability. Two different models for the vibrational excitation have been examined. Solutions have been obtained for the interdependent fluid-flow, chemical rate, and vibrational relaxation-rate equations incorporating estimated rate coefficients. Results are presented in the form of flow-field profiles for density, pressure, translational and vibrational temperatures, and species concentrations. The effects of vibrational excitation, vibration-dissociation coupling, and energy exchange between the vibrational modes are investigated. The effect of vibrational relaxation and vibration-dissociation coupling is much stronger in CO2 with three different vibrational modes than in diatomic gases with only a single mode. The results of this study show that the effect of coupled vibrational relaxation and dissociation can sometimes alter the flow-field profiles by a factor of 2 compared to similar calculations without such coupling. For vibrational relaxation the results indicate that the shock-wave profiles depend primarily on the rate at which the translational energy is fed into internal modes and not so strongly on the energy distribution among the modes.
Author: Fred R. DeJarnette
Publisher:
ISBN:
Category : Coupling constants
Languages : en
Pages : 34
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