Author: Charles E. TreanorPublisher:
ISBN:
Category : Chemical kinetics
Languages : en
Pages : 42
Book Description
Vibrational Relaxation Effects in Dissociation Rate-constant Measurements
Author: Charles E. TreanorPublisher:
ISBN:
Category : Chemical kinetics
Languages : en
Pages : 42
Book Description
NASA Technical Note
Author: Coupled Vibration and Dissociation Relaxation Behind Strong Shock Waves in Carbon Dioxide
Author: Franz HindelangPublisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages : 44
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.
Two Different Interpretations of Measured Dissociation-rate Constants and Their Effects on Coupled Vibrational-dissociational Flows of Oxygen Over a Wedge
Author: Fred R. DeJarnettePublisher:
ISBN:
Category : Coupling constants
Languages : en
Pages : 34
Book Description
NASA Technical Translation
Author: Effects of Two Vibration-dissociation Coupling Models on Nonequilibrium Hypersonic Flow of Nitrogen Over a Wedge
Author: Fred R. DeJarnettePublisher:
ISBN:
Category : Nonequilibrium thermodynamics
Languages : en
Pages : 36
Book Description
NASA Technical Report
Author: Technical Publications Announcements with Indexes
Author: United States. National Aeronautics and Space AdministrationPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1556
Book Description
Scientific and Technical Aerospace Reports
Author: Plasma Physics and Engineering
Author: Alexander FridmanPublisher: CRC Press
ISBN: 1439812292
Category : Science
Languages : en
Pages : 912
Book Description
Plasma plays an important role in a wide variety of industrial processes, including material processing, environmental control, electronic chip manufacturing, light sources, and green energy, not to mention fuel conversion and hydrogen production, biomedicine, flow control, catalysis, and space propulsion. Following the general outline of the bests