Modelisation Reduite De La Combustion Homogene Diesel

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Modelling Diesel Combustion

Author : P. A. Lakshminarayanan
Publisher : Springer Science & Business Media
ISBN 13 : 904813885X
Total Pages : 313 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Modelling Diesel Combustion by : P. A. Lakshminarayanan

Download or read book Modelling Diesel Combustion written by P. A. Lakshminarayanan and published by Springer Science & Business Media. This book was released on 2010-03-03 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phenomenology of Diesel Combustion and Modeling Diesel is the most efficient combustion engine today and it plays an important role in transport of goods and passengers on land and on high seas. The emissions must be controlled as stipulated by the society without sacrificing the legendary fuel economy of the diesel engines. These important drivers caused innovations in diesel engineering like re-entrant combustion chambers in the piston, lower swirl support and high pressure injection, in turn reducing the ignition delay and hence the nitric oxides. The limits on emissions are being continually reduced. The- fore, the required accuracy of the models to predict the emissions and efficiency of the engines is high. The phenomenological combustion models based on physical and chemical description of the processes in the engine are practical to describe diesel engine combustion and to carry out parametric studies. This is because the injection process, which can be relatively well predicted, has the dominant effect on mixture formation and subsequent course of combustion. The need for improving these models by incorporating new developments in engine designs is explained in Chapter 2. With “model based control programs” used in the Electronic Control Units of the engines, phenomenological models are assuming more importance now because the detailed CFD based models are too slow to be handled by the Electronic Control Units. Experimental work is necessary to develop the basic understanding of the pr- esses.

Modélisation réduite de la combustion homogène Diesel

Author : Jean-Baptiste Millet
Publisher :
ISBN 13 :
Total Pages : 244 pages
Book Rating : 4.:/5 (493 download)

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Book Synopsis Modélisation réduite de la combustion homogène Diesel by : Jean-Baptiste Millet

Download or read book Modélisation réduite de la combustion homogène Diesel written by Jean-Baptiste Millet and published by . This book was released on 2006 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: La modélisation sur une plage de paramètres initiaux la plus exhaustive de la combustion HCCI à l’aide de modèles offrant des temps de calculs réduits est nécessaire afin de limiter le nombre d’essais expérimentaux coûteux en temps et très onéreux. L’objectif de cette étude est de fournir un modèle physiquement simple de la combustion HCCI dans l’optique de l’optimisation et du contrôle moteur. Ce travail propose un modèle basé sur les observations physiques de la combustion et affranchi de mécanisme chimique. Le modèle proposé reproduit l’évolution de la fraction massique de carburant consommée et de la température. Il est piloté par un taux de réaction global Ω(T) qui décrit la consommation du carburant et l’évolution du dégagement d’énergie. La fonction Ω(T) se décompose en deux fonctions décrivant respectivement la dynamique plus lente caractéristique de la flamme froide et celle plus rapide de l’inflammation principale, ainsi que la transition entre ces deux phases. Ces fonctions ont été calibrées à l’aide du mécanisme de cinétique chimique réduit développé précédemment. Une relation pour le délai d’inflammation en fonction des conditions initiales du point de fonctionnement a été proposée. De même, des relations entre le taux de dégagement d’énergie de la flamme froide et de l’inflammation principale ont été établies, prenant en compte le phasing entre ces deux phases d’oxydation. Les résultats montrent que ce type de modèle peut décrire précisément les délais d’inflammation liés à la combustion HCCI (flamme froide et combustion principale), ainsi que les taux de dégagement d’énergie des deux phases, avec des temps de calcul très réduit. Le modèle proposé a été comparé à un modèle comprenant un mécanisme de cinétique chimique réduit et des essais expérimentaux provenant d’un moteur Renault. Dans les deux cas, les comparaisons ont montré que les résultats donnés par le modèle étaient tout à fait pertinents.

Modelling "homogeneous" Diesel Combustion and Assessing Viability in an Engine

Author : David Jack Patterson
Publisher :
ISBN 13 :
Total Pages : 295 pages
Book Rating : 4.:/5 (183 download)

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Book Synopsis Modelling "homogeneous" Diesel Combustion and Assessing Viability in an Engine by : David Jack Patterson

Download or read book Modelling "homogeneous" Diesel Combustion and Assessing Viability in an Engine written by David Jack Patterson and published by . This book was released on 1988 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Development of a Partially Premixed Combustion Model for a Diesel Engine Using Multiple Injection Strategies

Author : Rene Thygesen
Publisher : Logos Verlag Berlin GmbH
ISBN 13 : 3832530932
Total Pages : 157 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Development of a Partially Premixed Combustion Model for a Diesel Engine Using Multiple Injection Strategies by : Rene Thygesen

Download or read book Development of a Partially Premixed Combustion Model for a Diesel Engine Using Multiple Injection Strategies written by Rene Thygesen and published by Logos Verlag Berlin GmbH. This book was released on 2012 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to fulfil future emissions legislations, new combustion systems are to be investigated. One way of improving exhaust emissions is the application of multiple injection strategies and conventional or partially premixed combustion conditions to a Diesel engine. The application of numerical techniques as CFD supports and improves the quality of engine developments. Unfortunately, current spray and combustion models are not accurate enough to simulate multiple injection systems, being in this way a topic of research. The goal of this study was the development of a novel simulation method for the investigation of Diesel engines operated with multiple injection strategies and different combustion modes. The first part of this work focused in improving the spray modelling. The inform ation of 3D CFD simulations of the injector nozzle was introduced in the spray simulation as boundary conditions developing coupling subroutines for this issue. The atomisation modelling was also improved using validated presumed droplet size distributions. Moreover, to avoid the simulation of the injector nozzle for every investigated operating point, a novel interpolating tool was developed in order to create spray boundary conditions based on few 3D CFD simulations of the nozzle under certain initial and boundary conditions. The second part of this thesis dealt with the combustion modelling of Diesel engines. For this issue, a laminar flamelet approach called Representative Interactive Flamelet model (RIF) was selected and implemented. Afterwards, an extended combustion model based on RIF was developed in order to take into account multiple injection strategies. Finally, this new model was validated with a wide range of operating points: applying multiple injection strategies under conventional and partially premixed combustion conditions.

Modélisation 0D/1D de la combustion diesel

Author : Nicolas Bordet
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (819 download)

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Book Synopsis Modélisation 0D/1D de la combustion diesel by : Nicolas Bordet

Download or read book Modélisation 0D/1D de la combustion diesel written by Nicolas Bordet and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse porte sur la modélisation 0D/1D de la combustion Diesel dans les moteurs récents. L'objectif est d'augmenter la précision des modèles tout en limitant les temps de calcul associés afin d'utiliser la simulation comme un outil dédié à la mise au point. Dans une première partie, le développement d'un modèle 0D orienté simulation système est présenté. La prise en compte de l'ensemble des phénomènes physico-chimiques se déroulant dans la chambre de combustion confère au modèle un niveau de prédictivité conséquent. Un nouveau modèle de combustion de prémélange est proposé, permettant une modélisation détaillée des combustions fortement diluées et des combustions relatives aux injections précoces. Une approche innovante permettant de quantifier les interactions entre les jets pour la multi injection est également proposée. Après calibration sur un nombre restreint d'essais moteur, les résultats du modèle global sont comparés à des mesures expérimentales pour toute la plage de fonctionnement du moteur. La seconde partie de ce travail porte sur la modélisation 1D de la combustion Diesel. Un modèle de jet Diesel est d'abord développé et validé sur des mesures expérimentales. Ce modèle est ensuite étendu à des conditions réactionnelles à l'aide d'un couplage avec un modèle de combustion. Ce dernier s'appuie sur une tabulation des mécanismes de cinétique chimique, ainsi que sur une approche Eddy Break-Up permettant de modéliser le taux de réaction lié au micro mélange. Ce modèle est ensuite intégré à un modèle de chambre de combustion et une première validation du modèle sur des essais moteur réels est entreprise.

Determination of a Cavitation Model to Consider Its Impact on the Atomization in Diesel Engine Injection

Author : Yann Meslem
Publisher :
ISBN 13 :
Total Pages : 199 pages
Book Rating : 4.:/5 (87 download)

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Book Synopsis Determination of a Cavitation Model to Consider Its Impact on the Atomization in Diesel Engine Injection by : Yann Meslem

Download or read book Determination of a Cavitation Model to Consider Its Impact on the Atomization in Diesel Engine Injection written by Yann Meslem and published by . This book was released on 2013 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: La simulation de la combustion est aujourd'hui une étape indispensable dans les processus de conception et de mise au point des moteurs à combustion interne mais requiert de connaître les caractéristiques macroscopiques du spray (angle, longueur de pénétration, répartition des tailles de goutte), notamment dans le cadre des moteurs Diesel à injection directe. De précédentes études ont montré que le phénomène de cavitation, très présent dans l'injection Diesel haute pression, modifie les caractéristiques macroscopiques du spray. Le travail effectué durant cette thèse s'articule autour de la modélisation de la cavitation et de son impact sur l'atomisation dans le cadre de l'injection Diesel. Le modèle ELSA fournit à la fois une expression Lagrangienne de la zone diluée du spray et une expression Eulérienne de la zone dense du spray. Ainsi, il apporte les données relatives au spray d'une part, nécessaires aux calculs de combustion, et permet l'observation des interactions entre l'écoulement interne de l'injecteur et le développement du spray d'autre part. C'est pourquoi ce modèle a été choisi pour cette étude et développé de manière à prendre en compte le phénomène de cavitation. La majorité des modèles de cavitation est basée sur une version plus ou moins simplifiée de l'équation de Rayleigh-Plesset, qui régit la dynamique des bulles sphériques. Le modèle ici développé est basé sur cette équation dans une version complète et simplifiée. L'impact des phénomènes pris en compte dans cette équation a été préalablement étudié sur un cas réaliste d'injection Diesel haute pression. Finalement, la combinaison d'un modèle de cavitation, adapté aux configurations d'injection Diesel, et de l'approche ELSA pour représenter les zones denses diphasiques, permet d'obtenir une modélisation innovante de l'injection et de la cavitation. Les approches proposées sont testées sur une configuration académique dont l'écoulement interne ainsi que le spray ont été caractérisés.

Contribution à la modélisation de la combustion homogène (HCCI) des moteurs Diesel par réduction des mécanismes réactionnels et interaction chimie-turbulence

Download Contribution à la modélisation de la combustion homogène (HCCI) des moteurs Diesel par réduction des mécanismes réactionnels et interaction chimie-turbulence PDF Online Free

Author : Ludovic Noe͏̈l
Publisher :
ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.:/5 (492 download)

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Book Synopsis Contribution à la modélisation de la combustion homogène (HCCI) des moteurs Diesel par réduction des mécanismes réactionnels et interaction chimie-turbulence by : Ludovic Noe͏̈l

Download or read book Contribution à la modélisation de la combustion homogène (HCCI) des moteurs Diesel par réduction des mécanismes réactionnels et interaction chimie-turbulence written by Ludovic Noe͏̈l and published by . This book was released on 2005 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modelling of Combustion in Diesel Engines

Author : Cengizhan Cengiz
Publisher :
ISBN 13 :
Total Pages : 65 pages
Book Rating : 4.:/5 (85 download)

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Book Synopsis Modelling of Combustion in Diesel Engines by : Cengizhan Cengiz

Download or read book Modelling of Combustion in Diesel Engines written by Cengizhan Cengiz and published by . This book was released on 2009 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Study of Mixing and Combustion Modeling for Diesel Engine Using LES

Author : Ting Liang
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (697 download)

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Book Synopsis Study of Mixing and Combustion Modeling for Diesel Engine Using LES by : Ting Liang

Download or read book Study of Mixing and Combustion Modeling for Diesel Engine Using LES written by Ting Liang and published by . This book was released on 2010 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

CFD Modeling of Emissions Formation and Reduction in Heavy Duty Diesel Engines

Author : Alper Tolga Çalık
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (85 download)

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Book Synopsis CFD Modeling of Emissions Formation and Reduction in Heavy Duty Diesel Engines by : Alper Tolga Çalık

Download or read book CFD Modeling of Emissions Formation and Reduction in Heavy Duty Diesel Engines written by Alper Tolga Çalık and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely eliminated with the in- cylinder combustion techniques until now, hence, after-treatment is still necessary to meet the present emission legislations. Also with the development of the new engines which have different combustion regimes such as Homogeneous Charge Compression Ignition (HCCI), Modulated Kinetics (MK), Premixed Charge Compression Ignition (PCCI), Low Temperature Combustion (LTC), other emissions such as HC and CO became significant for compression ignition (CI) engines. This study investigates mainly formation/reduction of NOx and soot emissions in diesel engine coinbustion, especially in Heavy Duty Diesel (HDD) engines with the help of CFD engine modeling of the engine. The KIVA-3VR2 and CHEMKIN packages were used for the modeling purposes. CHALMERS diesel oil surrogate (DOS) model represented by a blend of aliphatic (n-heptane, 70%) and aromatic (toluene, 30%) components, turbulence/chemistry interaction approach, Partially Stirred Reactor (PaSR) model, applied with the detailed chemical mechanism and modified spray models were implemented into the KIVA-3VR2 for the modeling tasks. Diesel surrogate oil and detailed chemical mechanism were validated with shock-tube experiments on ignition delays for different pressures, temperatures and air/fuel ratios. Then modeling results for Volvo D12C engine for two compression ratios (18.0 and 14.0) and two different combustion regimes, MK and LTC, were compared with the experimental data. The reaction mechanism is modified in order to improve its NOx-soot emissions behavior which was not accurate enough. Different fuel injection times, loads, and both EGR-free and EGR cases were studied to extend the modeling capabilities. For all cases presented modeling approach is used to predict in-cylinder pressure, temperature, Rate of Heat Release (RoHR), combustion efficiency, NOx and soot emissions. Although tendency ofthe predicted emissions is in a good agreement with the experiments, a quantitative improvement of emission predictions is still required. Accurate modeling based on the detailed chemistry approach requires a proper balance between NOx formation, soot and CO oxidations in the chemical mechanism which is not easy to achieve. Also a new scientific tool, parametric ( )T dynamic map analysis, to evaluate engine combustion and emission formation based on the detailed chemical model of the diesel oil surrogate fuel. Emission formation and combustion efficiency can be predicted with the usage of this new type of analysis. The consistency of the map technique is mature enough to use it as a common tool, to analyze the engine combustion and emission formation processes.

Three Dimensional Modelling of Combustion in a Prechamber Diesel Engine

Author : P. Pinchon
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (496 download)

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Book Synopsis Three Dimensional Modelling of Combustion in a Prechamber Diesel Engine by : P. Pinchon

Download or read book Three Dimensional Modelling of Combustion in a Prechamber Diesel Engine written by P. Pinchon and published by . This book was released on 1989 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Large Eddy Simulation of Non Premixed Turbulent Flames

Author : Andreas Kempf
Publisher :
ISBN 13 : 9783183513062
Total Pages : 115 pages
Book Rating : 4.5/5 (13 download)

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Book Synopsis Large Eddy Simulation of Non Premixed Turbulent Flames by : Andreas Kempf

Download or read book Large Eddy Simulation of Non Premixed Turbulent Flames written by Andreas Kempf and published by . This book was released on 2004 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Flows and Chemical Reactions in Heterogeneous Mixtures

Author : Roger Prud'homme
Publisher : John Wiley & Sons
ISBN 13 : 1848217854
Total Pages : 204 pages
Book Rating : 4.8/5 (482 download)

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Book Synopsis Flows and Chemical Reactions in Heterogeneous Mixtures by : Roger Prud'homme

Download or read book Flows and Chemical Reactions in Heterogeneous Mixtures written by Roger Prud'homme and published by John Wiley & Sons. This book was released on 2014-12-03 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book - a sequel of previous publications 'Flows and Chemical Reactions' and 'Chemical Reactions in Flows and Homogeneous Mixtures' - is devoted to flows with chemical reactions in heterogeneous environments. Heterogeneous media in this volume include interfaces and lines. They may be the site of radiation. Each type of flow is the subject of a chapter in this volume. We consider first, in Chapter 1, the question of the generation of environments biphasic individuals: dusty gas, mist, bubble flow. Chapter 2 is devoted to the study at the mesoscopic scale: particle-fluid exchange of momentum and heat with determination of the respective exchange coefficients. In Chapter 3, we establish simplified equations of macroscopic balance for mass, for the momentum and energy, in the case of particles of one size (monodisperse suspension). Radiative phenomena are presented in Chapter 5.

ICREEC 2019

Author : Ahmed Belasri
Publisher : Springer Nature
ISBN 13 : 9811554447
Total Pages : 659 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis ICREEC 2019 by : Ahmed Belasri

Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

Plantwide Dynamic Simulators in Chemical Processing and Control

Author : William Luyben
Publisher : CRC Press
ISBN 13 : 1482275805
Total Pages : 448 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Plantwide Dynamic Simulators in Chemical Processing and Control by : William Luyben

Download or read book Plantwide Dynamic Simulators in Chemical Processing and Control written by William Luyben and published by CRC Press. This book was released on 2002-05-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting efficient and effective methods for developing dynamic simulations of chemical processes, this reference illustrates the techniques and fundamentals to develop, design, and test plantwide regulatory control schemes with commercial dynamic simulation packages. It provides case studies analyzing a wide variety of systems-ranging from simpl

Large Eddy Simulation of Complex Engineering and Geophysical Flows

Author : Boris Galperin
Publisher : Cambridge University Press
ISBN 13 : 0521430097
Total Pages : 626 pages
Book Rating : 4.5/5 (214 download)

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Book Synopsis Large Eddy Simulation of Complex Engineering and Geophysical Flows by : Boris Galperin

Download or read book Large Eddy Simulation of Complex Engineering and Geophysical Flows written by Boris Galperin and published by Cambridge University Press. This book was released on 1993-11-26 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Originally published in 1993, this book was the first to offer a comprehensive review of large eddy simulations (LES) - the history, state of the art, and promising directions for research. Among topics covered are fundamentals of LES; LES of incompressible, compressible, and reacting flows; LES of atmospheric, oceanic, and environmental flows; and LES and massivelt parallel computing. The book grew out of an international workshop that, for the first time, brought together leading researchers in engineering and geophysics to discuss developments and applications of LES models in their respective fields. It will be of value to anyone with an interest in turbulence modelling.

Theoretical and Numerical Combustion

Author : Thierry Poinsot
Publisher : R.T. Edwards, Inc.
ISBN 13 : 9781930217102
Total Pages : 544 pages
Book Rating : 4.2/5 (171 download)

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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,