A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows

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Total Pages : 340 pages
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Book Synopsis A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows by : Walter Albert Reinhardt

Download or read book A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows written by Walter Albert Reinhardt and published by . This book was released on 1969 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows

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ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows by : Walter Albert Reinhardt

Download or read book A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows written by Walter Albert Reinhardt and published by . This book was released on 1969 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

NASA Technical Report

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ISBN 13 :
Total Pages : 880 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis NASA Technical Report by : United States. National Aeronautics and Space Administration

Download or read book NASA Technical Report written by United States. National Aeronautics and Space Administration and published by . This book was released on 1969 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.:/5 (3 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monthly Catalog of United States Government Publications, Cumulative Index

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ISBN 13 :
Total Pages : 1348 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Monthly Catalog of United States Government Publications, Cumulative Index by : United States. Superintendent of Documents

Download or read book Monthly Catalog of United States Government Publications, Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1970 with total page 1348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monthly Catalog of United States Government Publications

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ISBN 13 :
Total Pages : 1320 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Monthly Catalog of United States Government Publications by : United States. Superintendent of Documents

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1966 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monthly Catalog of United States Government Publications

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Total Pages : pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Monthly Catalog of United States Government Publications by :

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Applied Mechanics Reviews

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ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.:/5 (26 download)

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Book Synopsis Applied Mechanics Reviews by :

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1971 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

U.S. Government Research & Development Reports

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ISBN 13 :
Total Pages : 982 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis U.S. Government Research & Development Reports by :

Download or read book U.S. Government Research & Development Reports written by and published by . This book was released on 1971 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aerodynamic Analyses Requiring Advanced Computers

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Total Pages : 788 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Aerodynamic Analyses Requiring Advanced Computers by :

Download or read book Aerodynamic Analyses Requiring Advanced Computers written by and published by . This book was released on 1975 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Canadian Journal of Chemistry

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ISBN 13 :
Total Pages : 770 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Canadian Journal of Chemistry by :

Download or read book Canadian Journal of Chemistry written by and published by . This book was released on 1972 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Annual Commencement

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ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Annual Commencement by : Stanford University

Download or read book Annual Commencement written by Stanford University and published by . This book was released on 1969 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

National Union Catalog

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ISBN 13 :
Total Pages : 964 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis National Union Catalog by :

Download or read book National Union Catalog written by and published by . This book was released on 1972 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.

Bibliography of Scientific and Industrial Reports

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ISBN 13 :
Total Pages : 1006 pages
Book Rating : 4.3/5 (126 download)

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Book Synopsis Bibliography of Scientific and Industrial Reports by :

Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1970-05 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Government Reports Announcements & Index

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ISBN 13 :
Total Pages : 1768 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Government Reports Announcements & Index by :

Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993 with total page 1768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Coupled Vibration and Dissociation Relaxation Behind Strong Shock Waves in Carbon Dioxide

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Total Pages : 44 pages
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Book Synopsis Coupled Vibration and Dissociation Relaxation Behind Strong Shock Waves in Carbon Dioxide by : Franz Hindelang

Download or read book Coupled Vibration and Dissociation Relaxation Behind Strong Shock Waves in Carbon Dioxide written by Franz Hindelang and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Comprehensive Dissertation Index, 1861-1972: Author index

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Total Pages : 1118 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Comprehensive Dissertation Index, 1861-1972: Author index by : Xerox University Microfilms

Download or read book Comprehensive Dissertation Index, 1861-1972: Author index written by Xerox University Microfilms and published by . This book was released on 1973 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt: