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An Experimental And Numerical Investigation Into Reacting Vortex Structures Associated With Unstable Combustion
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Book Synopsis An Experimental and Numerical Investigation Into Reacting Vortex Structures Associated with Unstable Combustion by : Donald William Kendrick
Download or read book An Experimental and Numerical Investigation Into Reacting Vortex Structures Associated with Unstable Combustion written by Donald William Kendrick and published by . This book was released on 1995 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Kendrick, Donald William Publisher :Ann Arbor, Mich. : University Microfilms International ISBN 13 : Total Pages :568 pages Book Rating :4.:/5 (437 download)
Book Synopsis An Experimental and Numerical Investigation Into Reacting Vortex Structures Associated with Unstable Combustion [microform] by : Kendrick, Donald William
Download or read book An Experimental and Numerical Investigation Into Reacting Vortex Structures Associated with Unstable Combustion [microform] written by Kendrick, Donald William and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1995 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of the Reacting Vortex Structures Associated with Pulse Combustion by : Thomas William Zsak
Download or read book An Investigation of the Reacting Vortex Structures Associated with Pulse Combustion written by Thomas William Zsak and published by . This book was released on 1993 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermoacoustic Instability by : R. I. Sujith
Download or read book Thermoacoustic Instability written by R. I. Sujith and published by Springer Nature. This book was released on 2021-12-14 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book systematically presents the consolidated findings of the phenomenon of self-organization observed during the onset of thermoacoustic instability using approaches from dynamical systems and complex systems theory. Over the last decade, several complex dynamical states beyond limit cycle oscillations such as quasiperiodicity, frequency-locking, period-n, chaos, strange non-chaos, and intermittency have been discovered in thermoacoustic systems operated in laminar and turbulent flow regimes. During the onset of thermoacoustic instability in turbulent systems, an ordered acoustic field and large coherent vortices emerge from the background of turbulent combustion. This emergence of order from disorder in both temporal and spatiotemporal dynamics is explored in the contexts of synchronization, pattern formation, collective interaction, multifractality, and complex networks. For the past six decades, the spontaneous emergence of large amplitude, self-sustained, tonal oscillations in confined combustion systems, characterized as thermoacoustic instability, has remained one of the most challenging areas of research. The presence of such instabilities continues to hinder the development and deployment of high-performance combustion systems used in power generation and propulsion applications. Even with the advent of sophisticated measurement techniques to aid experimental investigations and vast improvements in computational power necessary to capture flow physics in high fidelity simulations, conventional reductionist approaches have not succeeded in explaining the plethora of dynamical behaviors and the associated complexities that arise in practical combustion systems. As a result, models and theories based on such approaches are limited in their application to mitigate or evade thermoacoustic instabilities, which continue to be among the biggest concerns for engine manufacturers today. This book helps to overcome these limitations by providing appropriate methodologies to deal with nonlinear thermoacoustic oscillations, and by developing control strategies that can mitigate and forewarn thermoacoustic instabilities. The book is also beneficial to scientists and engineers studying the occurrence of several other instabilities, such as flow-induced vibrations, compressor surge, aeroacoustics and aeroelastic instabilities in diverse fluid-mechanical environments, to graduate students who intend to apply dynamical systems and complex systems approach to their areas of research, and to physicists who look for experimental applications of their theoretical findings on nonlinear and complex systems.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unsteady Combustion written by F. Culick and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains selected papers prepared for the NATO Advanced Study Institute on "Unsteady Combustion", which was held in Praia da Granja, Portugal, 6-17 September 1993. Approximately 100 delegates from 14 countries attended. The Institute was the most recent in a series beginning with "Instrumentation for Combustion and Flow in Engines", held in Vimeiro, Portugal 1987 and followed by "Combusting Flow Diagnostics" conducted in Montechoro, Portugal in 1990. Together, these three Institutes have covered a wide range of experimental and theoretical topics arising in the research and development of combustion systems with particular emphasis on gas-turbine combustors and internal combustion engines. The emphasis has evolved roughly from instrumentation and experimental techniques to the mixture of experiment, theory and computational work covered in the present volume. As the title of this book implies, the chief aim of this Institute was to provide a broad sampling of problems arising with time-dependent behaviour in combustors. In fact, of course, that intention encompasses practically all possibilities, for "steady" combustion hardly exists if one looks sufficiently closely at the processes in a combustion chamber. The point really is that, apart from the excellent paper by Bahr (Chapter 10) discussing the technology of combustors for aircraft gas turbines, little attention is directed to matters of steady performance. The volume is divided into three parts devoted to the subjects of combustion-induced oscillations; combustion in internal combustion engines; and experimental techniques and modelling.
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 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of Vortex Shedding by : Abubaker Awidat Salem
Download or read book Experimental and Numerical Investigation of Vortex Shedding written by Abubaker Awidat Salem and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of the Influence of Multiple-Burner Arrangements on Combustion Instabilities in Turbulent Swirl-Stabilized Flames by : Christian Kraus
Download or read book Experimental and Numerical Investigation of the Influence of Multiple-Burner Arrangements on Combustion Instabilities in Turbulent Swirl-Stabilized Flames written by Christian Kraus and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experiments and Numerical Simulations of Turbulent Combustion of Diluted Sprays by : Bart Merci
Download or read book Experiments and Numerical Simulations of Turbulent Combustion of Diluted Sprays written by Bart Merci and published by Springer Science & Business Media. This book was released on 2014-03-27 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reflects the results of the 2nd and 3rd International Workshops on Turbulent Spray Combustion. The focus is on progress in experiments and numerical simulations for two-phase flows, with emphasis on spray combustion. Knowledge of the dominant phenomena and their interactions allows development of predictive models and their use in combustor and gas turbine design. Experts and young researchers present the state-of-the-art results, report on the latest developments and exchange ideas in the areas of experiments, modelling and simulation of reactive multiphase flows. The first chapter reflects on flame structure, auto-ignition and atomization with reference to well-characterized burners, to be implemented by modellers with relative ease. The second chapter presents an overview of first simulation results on target test cases, developed at the occasion of the 1st International Workshop on Turbulent Spray Combustion. In the third chapter, evaporation rate modelling aspects are covered, while the fourth chapter deals with evaporation effects in the context of flamelet models. In chapter five, LES simulation results are discussed for variable fuel and mass loading. The final chapter discusses PDF modelling of turbulent spray combustion. In short, the contributions in this book are highly valuable for the research community in this field, providing in-depth insight into some of the many aspects of dilute turbulent spray combustion.
Book Synopsis Experimental and Numerical Investigation of Vortex Flow Over a 76/60-deg Double-delta Wing by : J. E. J. Maseland
Download or read book Experimental and Numerical Investigation of Vortex Flow Over a 76/60-deg Double-delta Wing written by J. E. J. Maseland and published by . This book was released on 1992 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Les of the Pulsating, Non-Reacting Flow in Combustion Chambers by : Balazs Pritz
Download or read book Les of the Pulsating, Non-Reacting Flow in Combustion Chambers written by Balazs Pritz and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2010-03 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lean premixed combustion allows for reducing the production of thermal NOx, therefore it is largely used in industrial combustion. Lean premixed combustors are, however, prone to combustion instabilities. An analytical model was developed by Buchner [14] in order to predict the stability limits of combustion systems. A significant input of this model is the damping ratio, which should be determined from experiment or numerical simulation. In the present work a numerical investigation of the pulsating, non-reacting flow in a model combustion chamber and a coupled system of burner plenum and combustion chamber is presented. The results of the Large Eddy Simulations (LES) are compared with the analytical model and experimental data. The prediction of the damping ratio by LES is very good. It depends, however, on special boundary conditions. By means of the simulations the basic assumptions made by the analytical model could be confirmed. The pulsating flow in the region of the exhaust gas pipe was analyzed and compared with the literature. The major damping mechanisms were identified in the system and a source of combustion instabilities could be localized.
Book Synopsis Numerical Simulation of Turbulent Flames Using Vortex Methods by : Ahmed F. Ghoniem
Download or read book Numerical Simulation of Turbulent Flames Using Vortex Methods written by Ahmed F. Ghoniem and published by . This book was released on 1985 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this research is to develop vortex methods for numerical simulation of multi-dimensional, time-dependent turbulent chemically-reacting flows with high temporal and spatial accuracy. Of particular interest is turbulent shear flows associated with the propagation of turbulent flames in combustion systems. Vortex methods are developed and incorporated in a numerical simulations of turbulent reacting flow, and applied to study the propagation and stability of turbulent flames in different geometrical configurations. At high Damkohler number, a dynamic thin flame model is used, while for slower reactions, the vortex scheme is extended to solve the energy and species equations with finite rate chemical reaction in a Lagrangian particle form. Results have been obtained for a confined mixing layer, a recirculating flow over a rearward facing step, and a confined shallow cavity. Detailed analyses have been performed to validate the numerical schemes and to study the structure and stability of these flows. The scheme has been extended to three dimension flow and an investigation of the transition to turbulence in an axisymmetric shear layer has been initiated. Currently, the combustion algorithms. Are being linked to the vortex simulation to predict the interaction between the turbulent field and the burning process. Keywords: Turbulent combustion.
Book Synopsis Numerical Simulation of Turbulent Combustion Using Vortex Methods by : Ahmed F. Ghoniem
Download or read book Numerical Simulation of Turbulent Combustion Using Vortex Methods written by Ahmed F. Ghoniem and published by . This book was released on 1988 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the course of this year, we have concentrated on the validation of the transport element method in two dimensions and its extension to: three dimensional flow, to reacting flow with finite Arrhenius rates, and to variable-density flow including the effect of gravity. Comparisons with experimental data on a reacting shear layer with low heat release show that the numerical results agree very closely with the measurements of the velocity statistics, the passive scalar statistics, the product formation rate and the product thickness. Numerical studies are used to establish the dependence of the product formation rate on the Reynolds number, the Lewis number and the Damkohler number. Studies of a variable-density flow focused on the effects of density gradients on the structure of turbulence in both the momentum driven and gravity-driven reacting flow. In particular, how does heat release change the rates of growth and mixing within the layer via the impact of the expansion field and the baroclinic vorticity generation due to the density gradients. For this purpose, examples of a horizontal premixed reacting shear layer and a vertical jet diffusion flame are analyzed. Numerical simulation, Turbulent combustion, Vortex methods. (mjm).
Book Synopsis Combustings Flow Diagnostics by : D.F.G. Durão
Download or read book Combustings Flow Diagnostics written by D.F.G. Durão and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book consists of papers prepared for and presented at a NATO sponsored Advanced Study Institute which was held in Montechoro, Portugal during the period 16-27 April, 1990. This Institute was attended by approximately ninety delegates from fifteen countries and followed from a related Institute held in Vimeiro, Portugal in 1987 (see the book entitled "Instrumentation for Combustion and Flow in Engines", edited by D. F. G. Dur~o, J. H. Whitelaw and P. O. Witzel. The purposes of the first Institute related closely to instrumentation for use in gas-turbine combustors and the cylinders of internal-combustion engines. These topics were also addressed in the second Institute, though in a manner which was wider ranging and chosen to demonstrate and explain the development and application of measurement methods to combusting flows in general. The papers contained in this boo~ were selected to provide the reader with a comprehensive and up-to-date view of the variety of experimental techniques available to measure in combusting flows. Included are discussions of their range and applicability, potential accuracy and ease of use. Thus, the first paper provides a brief overview and the second an indication of those aspects of combustion which should influence the choice of flow property to be measured and the technique to be used.
Book Synopsis An Experimental and Numerical Investigation of Asymmetrically-fueled Whirl Flames by : Hampton Clay Gabler
Download or read book An Experimental and Numerical Investigation of Asymmetrically-fueled Whirl Flames written by Hampton Clay Gabler and published by . This book was released on 1998 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical/experimental Investigation Into Multiple Vortex Structures Formed Over Wings with Flat End-caps by : Elgin A. Anderson
Download or read book Numerical/experimental Investigation Into Multiple Vortex Structures Formed Over Wings with Flat End-caps written by Elgin A. Anderson and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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