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Developpement De Lallumage Laser
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Book Synopsis Développement de L'Allumage Laser by : Cyprien Ternel
Download or read book Développement de L'Allumage Laser written by Cyprien Ternel and published by Omniscriptum. This book was released on 2011-09 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avec les nouvelles stratégies de combustion, la bougie atteint les limites de son potentiel. Nous avons travaillé sur un nouveau type d'allumage: l'allumage laser. Nous avons caractérisé la nature du plasma laser. La valeur seuil d'irradiance qui déclenche le claquage est de 50 GW/cm2. Nos essais d'allumage ont soulevé le problème de raté de combustion pour les milieux fortement dilués. La présence seule du plasma n'entraîne pas un allumage réussi. Le but est aussi d'apporter une source suffisamment volumineuse, supérieure au volume critique d'allumage, qui a été déterminé de façon théorique. Deux lasers ont été testés sur moteur: un laser de puissance et un laser compact afin d'étudier la faisabilité de l'implantation d'un tel système. L'analyse de combustion montre que le plasma entraîne une initiation plus stable. Aucun effet mémoire de la qualité de l'allumage sur la propagation de la flamme n'a été mis en évidence. Des essais en fonctionnement stratifié ont aussi été effectués.
Book Synopsis Contribution au développement de l'allumage par laser pour les moteurs à combustion interne by : Cyprien Ternel
Download or read book Contribution au développement de l'allumage par laser pour les moteurs à combustion interne written by Cyprien Ternel and published by . This book was released on 2006 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avec les nouvelles stratégies de combustion, la bougie atteint les limites de son potentiel. Nous avons travaillé sur un nouveau type d'allumage : l'allumage laser. Nous avons caractérisé la nature du plasma laser. La valeur seuil d'irradiance qui déclenche le claquage est d'environ 50GW/cm2. Nos essais d'allumage ont soulevé le problème de raté de combustion pour les milieux fortement dilués. La présence seule du plasma n'entraîne pas un allumage réussi. Le but est aussi d'apporter une source suffisamment volumineuse, supérieure au volume critique d'allumage, qui a été déterminé de façon théorique. Deux lasers ont été testés sur moteur : un laser de puissance et un laser compact afin d'étudier la faisabilité de l'implantation d'un tel système. L'analyse de combustion montre que le plasma entraîne une initiation plus stable. Aucun effet mémoire de la qualité de l'allumage sur la propagation de la flamme n'a été mis en évidence. Des essais en fonctionnement stratifié ont aussi été effectués.
Book Synopsis Etude à l'allumage par laser de mélanges en phases liquides dispersées et gazeuses by : Hazem El-Rabii
Download or read book Etude à l'allumage par laser de mélanges en phases liquides dispersées et gazeuses written by Hazem El-Rabii and published by . This book was released on 2004 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude de l'allumage d'un mélange gazeux combustible/comburant est d'un intérêt fondamental et d'une importance cruciale dans les moteurs à combustion interne et dans les turbines à gaz. Une nouvelle méthode d'allumage, récemment utilisée, consiste à créer une étincelle par focalisation d'un faisceau laser. 'Objectif du présent travail est d'effectuer une étude paramétrique de ce mode d'allumage pour des mélanges en phases liquides dispersées et gazeuses, ainsi que d'apporter une contribution à la compréhension des phénomènes physiques liés au claquage optique, aussi bien dans l'air que dans les mélanges inflammables. Les plasmas rencontrés sont caractérisés, en termes de concentrations et de températures électroniques, avant d'aborder l'étude paramétrique du claquage dans l'air et de l'allumage des mélanges gazeux et diphasiques inflammables. L'importance de la dynamique induite par l'étincelle laser sur l'évolution de la structure et de la forme du noyau d'allumage est considérée. Le rôle des aberrations, et en particulier de l'aberration sphérique, est soigneusement étudié du point de vue théorique. Des conclusions importantes sur l'interprétation des résultats expérimentaux sont dégagées. La détermination des seuils de claquage, ainsi que l'identification des processus déterminants, sont analysés à la lumière d'un modèle basé sur la détermination de l'évolution de la concentration d'électrons libres dans le volume focal. Finalement, la faisabilité de l'allumage laser à la sortie d'un injecteur prévaporisé, prémélangé en régime pauvre est démontrée.
Book Synopsis Stabilization and Dynamic of Premixed Swirling Flames by : Paul Palies
Download or read book Stabilization and Dynamic of Premixed Swirling Flames written by Paul Palies and published by Academic Press. This book was released on 2020-07-03 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stabilization and Dynamic of Premixed Swirling Flames: Prevaporized, Stratified, Partially, and Fully Premixed Regimes focuses on swirling flames in various premixed modes (stratified, partially, fully, prevaporized) for the combustor, and development and design of current and future swirl-stabilized combustion systems. This includes predicting capabilities, modeling of turbulent combustion, liquid fuel modeling, and a complete overview of stabilization of these flames in aeroengines. The book also discusses the effects of the operating envelope on upstream fresh gases and the subsequent impact of flame speed, combustion, and mixing, the theoretical framework for flame stabilization, and fully lean premixed injector design. Specific attention is paid to ground gas turbine applications, and a comprehensive review of stabilization mechanisms for premixed, partially-premixed, and stratified premixed flames. The last chapter covers the design of a fully premixed injector for future jet engine applications. Features a complete view of the challenges at the intersection of swirling flame combustors, their requirements, and the physics of fluids at work Addresses the challenges of turbulent combustion modeling with numerical simulations Includes the presentation of the very latest numerical results and analyses of flashback, lean blowout, and combustion instabilities Covers the design of a fully premixed injector for future jet engine applications
Book Synopsis Migration of Hydrocarbons in Sedimentary Basins by : Brigitte Doligez
Download or read book Migration of Hydrocarbons in Sedimentary Basins written by Brigitte Doligez and published by Editions TECHNIP. This book was released on 1987 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UVX 96 written by Eric Fogarassy and published by . This book was released on 1997 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Project Vesta: Fire in Dry Eucalypt Forest by : JS Gould
Download or read book Project Vesta: Fire in Dry Eucalypt Forest written by JS Gould and published by CSIRO PUBLISHING. This book was released on 2008-08-12 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Project Vesta was a comprehensive research project to investigate the behaviour and spread of high-intensity bushfires in dry eucalypt forests with different fuel ages and understorey vegetation structures. The project was designed to quantify age-related changes in fuel attributes and fire behaviour in dry eucalypt forests typical of southern Australia. The four main scientific aims of Project Vesta were: To quantify the changes in the behaviour of fire in dry eucalypt forest as fuel develops with age (i.e. time since fire); To characterise wind speed profiles in forest with different overstorey and understorey vegetation structure in relation to fire behaviour; To develop new algorithms describing the relationship between fire spread and wind speed, and fire spread and fuel characteristics including load, structure and height; and to develop a National Fire Behaviour Prediction System for dry eucalypt forests. These aims have been addressed through a program of experimental burning and associated studies at two sites in the south-west of Western Australia.
Download or read book Journal de physique written by and published by . This book was released on 2003 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atoms, Solids, and Plasmas in Super-Intense Laser Fields by : Dimitri Batani
Download or read book Atoms, Solids, and Plasmas in Super-Intense Laser Fields written by Dimitri Batani and published by Springer Science & Business Media. This book was released on 2001-09-30 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 30th Course of the International School of Quantum Electronics on Atoms, Solids and Plasmas in Super-Intense Laser Fields, held 8-14 July, in Erice, Sicily
Book Synopsis An Introduction to Turbulent Reacting Flows by : R. S. Cant
Download or read book An Introduction to Turbulent Reacting Flows written by R. S. Cant and published by Imperial College Press. This book was released on 2008 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides physical intuition and key entries to the body of literature. This book includes historical perspective of the theories.
Book Synopsis Theoretical and Numerical Combustion by : Thierry Poinsot
Download or read book Theoretical and Numerical Combustion written by Thierry Poinsot and published by R.T. Edwards, Inc.. This book was released on 2005 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introducing numerical techniques for combustion, this textbook describes both laminar and turbulent flames, addresses the problem of flame-wall interaction, and presents a series of theoretical tools used to study the coupling phenomena between combustion and acoustics. The second edition incorporates recent advances in unsteady simulation methods,
Book Synopsis Atoms and Plasmas in Super-intense Laser Fields by : Dimitri Batani
Download or read book Atoms and Plasmas in Super-intense Laser Fields written by Dimitri Batani and published by SIF Edizioni Scientifiche. This book was released on 2004 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Oil & Gas Science and Technology by :
Download or read book Oil & Gas Science and Technology written by and published by . This book was released on 2003 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Diagnostics for Magnetic and Inertial Fusion by : Peter E. Stott
Download or read book Advanced Diagnostics for Magnetic and Inertial Fusion written by Peter E. Stott and published by Springer Science & Business Media. This book was released on 2011-06-28 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the International Conference on Advanced Diagnostics for Magnetic and Inertial Fusion, held September 3-7, 2001 at Villa Monastero, Varenna, Italy. This volume focuses on future diagnostic requirements for fusion energy research emphasizing advanced diagnostics, new techniques and areas where further progress is required.
Book Synopsis Mathematical Modelling of Gas-Phase Complex Reaction Systems: Pyrolysis and Combustion by :
Download or read book Mathematical Modelling of Gas-Phase Complex Reaction Systems: Pyrolysis and Combustion written by and published by Elsevier. This book was released on 2019-06-21 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical Modelling of Gas-Phase Complex Reaction Systems: Pyrolysis and Combustion, Volume 45, gives an overview of the different steps involved in the development and application of detailed kinetic mechanisms, mainly relating to pyrolysis and combustion processes. The book is divided into two parts that cover the chemistry and kinetic models and then the numerical and statistical methods. It offers a comprehensive coverage of the theory and tools needed, along with the steps necessary for practical and industrial applications. Details thermochemical properties and "ab initio" calculations of elementary reaction rates Details kinetic mechanisms of pyrolysis and combustion processes Explains experimental data for improving reaction models and for kinetic mechanisms assessment Describes surrogate fuels and molecular reconstruction of hydrocarbon liquid mixtures Describes pollutant formation in combustion systems Solves and validates the kinetic mechanisms using numerical and statistical methods Outlines optimal design of industrial burners and optimization and dynamic control of pyrolysis furnaces Outlines large eddy simulation of turbulent reacting flows
Author :International Atomic Energy Agency Publisher :International Atomic Energy Agency ISBN 13 :9789201063205 Total Pages :72 pages Book Rating :4.0/5 (632 download)
Book Synopsis In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 by : International Atomic Energy Agency
Download or read book In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Download or read book Emergency Preparedness Digest written by and published by . This book was released on 1990 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
