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
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
The Effect of Dissociation on the Rate of Vibrational Relaxation
Author: Charles E. TreanorPublisher:
ISBN:
Category : Dissociation
Languages : en
Pages : 46
Book Description
NASA Technical Note
Author: Vibrational Relaxation and Dissociation Rate Measurements in Polyatomic Molecules
Author: M. Tyaga RajuPublisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Laser schlieren technique has been used to obtain vibrational-vibrational energy transfer and dissociation rates in some polyatomic molecules behind incident shock waves. A series mechanism was postulated in the earlier studies to explain the measured energy transfer rates in SO2 obtained using the ultrasonic and laser induced fluorescence techniques.
The Coupling of Vibrational Relaxation and Dissociation
Author: M. GreenblattPublisher:
ISBN:
Category : Dissociation
Languages : en
Pages : 68
Book Description
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
Effects of Chemical Dissociation and Molecular Vibrations on Steady One-dimensional Flow
Author: Steve P. HeimsPublisher:
ISBN:
Category : Dissociation
Languages : en
Pages : 76
Book Description
A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows
Author: Walter Albert ReinhardtPublisher:
ISBN:
Category : Dissociation
Languages : en
Pages : 340
Book Description
A simplified mathematical model is derived that is useful for studying the effects of vibration-dissociation coupling in fluid flows. The derivation is based on energy-moment procedure for simplifying the master equations. To obtain the model equations it is assumed that the vibrational energy can be approximated by the introduction of two vibrational temperatures. The effects of molecular anharmonicity are also accounted for in an approximate manner. The parameters contained within the equations are evaluated by making comparisons with experimental data. It is shown that the model contains the minimum required structure allowing favorable agreement with existing experimental data. Numerical solutions are given for the quasi-steady zone behind a normal shock wave, for the complete structure of a shock wave, and for nozzle flow. The results provide the appropriate pre-exponential temperature dependence of the effective dissociation rate, yield and induction time before dissociation is observed, and, in the case of expanding flow, yield one-fourth less effective relaxation time than the Landau-Teller theory. The thermodynamic quantities for the vibrational mode (partition function, internal energy, and specific heat) agree accurately with like quantities evaluated from spectroscopic data. By the introduction of appropriate assumptions it is shown that the equations reduce to a form identical to the Marrone-Treanor model except for a "truncation factor". When the vibrational temperatures are not large, the model is identical to that of Landau and Teller. The numerical procedure used to integrate the system of rate and flow equations is also described.
Chemical Relaxation with Preferential Dissociation from Excited Vibrational Levels
Author: Paul V. MarronePublisher:
ISBN:
Category : Chemical reactions
Languages : en
Pages : 60
Book Description