Structure Of A Turbulent Reacting Mixing Layer
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Structure Of A Turbulent Reacting Mixing Layer
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Author : Richard S. Miller
language : en
Publisher:
Release Date : 1993
Structure Of A Turbulent Reacting Mixing Layer written by Richard S. Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Turbulent Mixing In Nonreactive And Reactive Flows
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Author : S. Murthy
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Turbulent Mixing In Nonreactive And Reactive Flows written by S. Murthy and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
Turbulence, mixing and the mutual interaction of turbulence and chemistry continue to remain perplexing and impregnable in the fron tiers of fluid mechanics. The past ten years have brought enormous advances in computers and computational techniques on the one hand and in measurements and data processing on the other. The impact of such capabilities has led to a revolution both in the understanding of the structure of turbulence as well as in the predictive methods for application in technology. The early ideas on turbulence being an array of complicated phenomena and having some form of reasonably strong coherent struc ture have become well substantiated in recent experimental work. We are still at the very beginning of understanding all of the aspects of such coherence and of the possibilities of incorporating such structure into the analytical models for even those cases where the thin shear layer approximation may be valid. Nevertheless a distinguished body of "eddy chasers" has come into existence. The structure of mixing layers which has been studied for some years in terms of correlations and spectral analysis is also getting better understood. Both probability concepts such as intermittency and conditional sampling as well as the concept of large scale structure and the associated strain seem to indicate possibilities of distinguishing and synthesizing 'engulfment' and molecular mixing.
Visualizations Of The Structure Of The Turbulent Mixing Layer Under Compressible Conditions
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Author : N. T. Clemens
language : en
Publisher:
Release Date : 1990
Visualizations Of The Structure Of The Turbulent Mixing Layer Under Compressible Conditions written by N. T. Clemens and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Structure Of The Turbulent Mixing Layer
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Author : Garry L. Brown
language : en
Publisher:
Release Date : 1972
Structure Of The Turbulent Mixing Layer written by Garry L. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.
Results of an experimental study of turbulent mixing between two streams of different density are summarized. The effects of density difference in flows at low Mach number are compared to those due to compressibility effects at high Mach number. The mixing layer at low Mach number is examined for large vortex structures. (Author).
Direct Simulations Of Chemically Reacting Turbulent Mixing Layers
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-06
Direct Simulations Of Chemically Reacting Turbulent Mixing Layers written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-06 with categories.
The results of direct numerical simulations of chemically reacting turbulent mixing layers are presented. This is an extension of earlier work to a more detailed study of previous three dimensional simulations of cold reacting flows plus the development, validation, and use of codes to simulate chemically reacting shear layers with heat release. Additional analysis of earlier simulations showed good agreement with self similarity theory and laboratory data. Simulations with a two dimensional code including the effects of heat release showed that the rate of chemical product formation, the thickness of the mixing layer, and the amount of mass entrained into the layer all decrease with increasing rates of heat release. Subsequent three dimensional simulations showed similar behavior, in agreement with laboratory observations. Baroclinic torques and thermal expansion in the mixing layer were found to produce changes in the flame vortex structure that act to diffuse the pairing vortices, resulting in a net reduction in vorticity. Previously unexplained anomalies observed in the mean velocity profiles of reacting jets and mixing layers were shown to result from vorticity generation by baroclinic torques. Metcalfe, Ralph W. and Mcmurtry, Patrick A. and Jou, Wen-Huei and Riley, James J. and Givi, Peyman Unspecified Center...
Direct Simulations Of Chemically Reacting Turbulent Mixing Layers
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-11-03
Direct Simulations Of Chemically Reacting Turbulent Mixing Layers written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-03 with Science categories.
The results of direct numerical simulations of chemically reacting turbulent mixing layers are presented. This is an extension of earlier work to a more detailed study of previous three dimensional simulations of cold reacting flows plus the development, validation, and use of codes to simulate chemically reacting shear layers with heat release. Additional analysis of earlier simulations showed good agreement with self similarity theory and laboratory data. Simulations with a two dimensional code including the effects of heat release showed that the rate of chemical product formation, the thickness of the mixing layer, and the amount of mass entrained into the layer all decrease with increasing rates of heat release. Subsequent three dimensional simulations showed similar behavior, in agreement with laboratory observations. Baroclinic torques and thermal expansion in the mixing layer were found to produce changes in the flame vortex structure that act to diffuse the pairing vortices, resulting in a net reduction in vorticity. Previously unexplained anomalies observed in the mean velocity profiles of reacting jets and mixing layers were shown to result from vorticity generation by baroclinic torques. Metcalfe, Ralph W. and Mcmurtry, Patrick A. and Jou, Wen-Huei and Riley, James J. and Givi, Peyman Unspecified Center...
Turbulent Mixing And Chemical Reactions
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Author : Jerzy Bałdyga
language : en
Publisher: John Wiley & Sons
Release Date : 1999-03-12
Turbulent Mixing And Chemical Reactions written by Jerzy Bałdyga and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-03-12 with Science categories.
Turbulent Mixing and Chemical Reactions Jerzy Ba???dyga, Warsaw University of Technology, Poland John R. Bourne, Visiting Professor, University of Birmingham, UK and Emeritus Professor, ETH Zurich, Switzerland The way in which reagents are mixed can greatly influence the yield and range of products formed by fast, multiple chemical reactions. Understanding this phenomenon enables chemists to carry out reactions more selectively, make better use of raw materials and simplify product workup and separation. Turbulent Mixing and Chemical Reactions presents a balanced treatment of the connection between mixing and reaction. It contains theoretical aspects, experimental methods and expected results as well as worked examples to illustrate problem solving. This book will be of interest to all scientists involved in chemical engineering, physical chemistry, and synthetic chemists in the fine chemical and pharmaceuticals industry.
Chemical Reactions In Turbulent Mixing
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Author : H. W. Liepmann
language : en
Publisher:
Release Date : 1979
Chemical Reactions In Turbulent Mixing written by H. W. Liepmann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with categories.
The combustion facility (H2-F2) is now nearing completion. As of this writing, a high speed mixing layer has been realized in the test section, using high pressure air. This certifies the flow facility down to and including the test section. Preliminary results on the effect of high heat release in a turbulent mixing zone were obtained in the NO-O3 experiment. These results are consistent with predictions based on previously measured p.d.f, 's in non-reacting mixing layers, but in conspicuous disagreements with a variety of accepted model calculations. These results demonstrate again the important influence of the large scale coherent structures on chemical reactions in turbulent flows. The Laser Induced Fluorescence technique has now been extended to allow direct space and time resolved measurements of the reaction products. The first four channels of the multi-channel laser Doppler velocimetry system are essentially completed. The first experiments using this new development are expected in the course of this summer. Digital image analysis of particle streak photography has also been explored as a direct means of two-dimensional measurements of the velocity field in a plane. Finally, a prototype system using a 100 element acoustic detector array has been completed. Initial measurements with four of these channels using 300 kHz sound have been successfully made. (Author).
Turbulence In Mixing Operations
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Author : Robert Brodkey
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Turbulence In Mixing Operations written by Robert Brodkey and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
Turbulence in Mixing Operations: Theory and Application to Mixing and Reaction presents a summary of the current status of research on turbulent motion, mixing, and kinetics. Each chapter of this book discusses turbulence in the context of mixing and reaction in scalar fields. Chapters I and III discuss the classification of turbulent reacting systems and the different possibilities in this context. Chapter II reviews the properties of passive mixing. Chapter IV looks at turbulent mixing in chemically reactive flows. Chapter V uses different techniques to make parallel numerical calculations of both mixing and reaction. Finally, Chapter VI reviews turbulence and actual industrial mixing operations. This book will be of great value for chemical and industrial engineers, especially for those interested in turbulent and industrial mixing.
Coherent Structures In Turbulent Shear Layers And Relation To Mixing Reaction And Combustion
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Author : CALIFORNIA UNIV BERKELEY COLL OF ENGINEERING.
language : en
Publisher:
Release Date : 1986
Coherent Structures In Turbulent Shear Layers And Relation To Mixing Reaction And Combustion written by CALIFORNIA UNIV BERKELEY COLL OF ENGINEERING. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
A number of numerical analyses served as experiments which led to a broad range of ideas about the dynamics of mixing layer. One theme which emerged early was the adversary role of vorticity and of deformation - two quanities which attempt to subjugate each other and whose competition is the subject matter of the development and growth to the shear flow. Another strand of the work follows a number of instabilities (two and three dimensional) which lead to recognizable non-linear motions. A third focus of the work relates vorticity and the mixing of scalars. The work started out to attempt to explain striking experimental results and ended by making a number of predictions which have not yet been experimentally established. A significant fraction, though not all of the typical motions which are dynamically plausible in a shear layer have been examined and given simple analytic representation. Finally the basis for the effective control of the shear layer has been laid.