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
NASA Technical Note
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
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.
Study of High-density Hypervelocity Flows and Similitudes
Author: Cornell Aeronautical LaboratoryPublisher:
ISBN:
Category : Gas flow
Languages : en
Pages : 320
Book Description
Keywords Index to U.S. Government Technical Reports
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1160
Book Description
Chemical Dynamics in Extreme Environments
Author: Rainer A. DresslerPublisher: World Scientific
ISBN: 9810241771
Category : Science
Languages : en
Pages : 631
Book Description
As computing power increases, a growing number of macroscopic phenomena are modeled at the molecular level. Consequently, new requirements are generated for the understanding of molecular dynamics in exotic conditions. This book illustrates the importance of detailed chemical dynamics and the role it plays in the phenomenology of a number of extreme environments. Each chapter addresses one or more extreme environments, outlines the associated chemical mechanisms of relevance, and then covers the leading edge science that elucidates the chemical coupling. The chapters exhibit a balance between theory and experiment, gas phase, solid state, and surface dynamics, and geophysical and technical environments.
Keywords Index to U.S. Government Technical Reports (permuted Title Index).
Author: United States. Department of Commerce. Office of Technical ServicesPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 836
Book Description
Author: