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Modeling Soot Formation In Diesel Engines
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Book Synopsis Modeling Soot Formation in Diesel Engines by : Alumah Arad
Download or read book Modeling Soot Formation in Diesel Engines written by Alumah Arad and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study focuses on using biodiesel fuel as a means for decreasing diesel engine particulateemissions. Biodiesel is a general name for mixtures of long chain esters, generally methyl or ethylesters, used as alternative fuels in diesel engines. Biodiesel is produced by transesterification, usuallyof vegetable oils, with short chain aliphatic alcohols. Most researchers agree that diesel engineparticulate matter emissions decrease with the addition of biodiesel to diesel fuel.In this study, a new phenomenological model of soot formation and oxidation was developed fordiesel-biodiesel blend combustion."-- From the abstract.
Book Synopsis Modeling Soot Formation in Diesel Engines Using Conditional Moment Closure by : Michele Bolla
Download or read book Modeling Soot Formation in Diesel Engines Using Conditional Moment Closure written by Michele Bolla and published by . This book was released on 2013 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soot Formation in Combustion by : Henning Bockhorn
Download or read book Soot Formation in Combustion written by Henning Bockhorn and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soot Formation in Combustion represents an up-to-date overview. The contributions trace back to the 1991 Heidelberg symposium entitled "Mechanism and Models of Soot Formation" and have all been reedited by Prof. Bockhorn in close contact with the original authors. The book gives an easy introduction to the field for newcomers, and provides detailed treatments for the specialists. The following list of contents illustrates the topics under review:
Book Synopsis Three Dimensional Modeling of Combustion and Soot Formation in an Indirect Injection Diesel Engine by : M. Zellat
Download or read book Three Dimensional Modeling of Combustion and Soot Formation in an Indirect Injection Diesel Engine written by M. Zellat and published by . This book was released on 1990 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulation of Soot Formation and Oxidation in Diesel Engines by : M. Gorokhovski
Download or read book Numerical Simulation of Soot Formation and Oxidation in Diesel Engines written by M. Gorokhovski and published by . This book was released on 1993 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engine Modeling and Simulation by : Avinash Kumar Agarwal
Download or read book Engine Modeling and Simulation written by Avinash Kumar Agarwal and published by Springer Nature. This book was released on 2021-12-16 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the simulation and modeling of internal combustion engines. The contents include various aspects of diesel and gasoline engine modeling and simulation such as spray, combustion, ignition, in-cylinder phenomena, emissions, exhaust heat recovery. It also explored engine models and analysis of cylinder bore piston stresses and temperature effects. This book includes recent literature and focuses on current modeling and simulation trends for internal combustion engines. Readers will gain knowledge about engine process simulation and modeling, helpful for the development of efficient and emission-free engines. A few chapters highlight the review of state-of-the-art models for spray, combustion, and emissions, focusing on the theory, models, and their applications from an engine point of view. This volume would be of interest to professionals, post-graduate students involved in alternative fuels, IC engines, engine modeling and simulation, and environmental research.
Author :P. A. Lakshminarayanan Publisher :Springer Science & Business Media ISBN 13 :904813885X Total Pages :313 pages Book Rating :4.0/5 (481 download)
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.
Book Synopsis Measurement and Modelling of Diesel Engine Combustion with Particular Reference to Soot Formation by : Xiang-Dong Chen
Download or read book Measurement and Modelling of Diesel Engine Combustion with Particular Reference to Soot Formation written by Xiang-Dong Chen and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particulate Carbon by : Donald Siegla
Download or read book Particulate Carbon written by Donald Siegla and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the symposium, "Particulate Carbon: Formation During Combustion", held at the General Motors Research Laboratories on October 15 and 16, 1980, was to discuss fundamental aspects of soot formation and oxidation in combustion systems and to stimulate new research by extensive interactions among the participants. This book contains lhe papers and discussions of that symposium, the 26th in an annual series covering many different disciplines which are timely and of interest to both General Motors and the technical community at large. The subject of this symposium has considerable relevance for man in his effort to control and preserve his environment. Emission of particulate carbon into the atmos phere from combustion sources is of concern to scientists and laymen alike. The hope of reducing this emission clearly requires an understanding of its formation during the combustion process, itself an area of considerable long-term research interest. It is our hope that this symposium has served to summarize what is known so that what remains to be learned can be pursued with greater vigor.
Book Synopsis A Theoretical and Experimental Study of Emissions Modeling for Diesel Engines with Comparisons to In-cylinder Imaging by : Gregory James Hampson
Download or read book A Theoretical and Experimental Study of Emissions Modeling for Diesel Engines with Comparisons to In-cylinder Imaging written by Gregory James Hampson and published by . This book was released on 1997 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Typescript.
Book Synopsis Soot Formation in Combustion by : Henning Bockhorn
Download or read book Soot Formation in Combustion written by Henning Bockhorn and published by . This book was released on 1995-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Oxygenate Molecular Structure on Soot Production in Direct-injection Diesel Engines by : William J. Pitz
Download or read book The Effect of Oxygenate Molecular Structure on Soot Production in Direct-injection Diesel Engines written by William J. Pitz and published by . This book was released on 2003 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A combined experimental and kinetic modeling study of soot formation in diesel engine combustion has been used to study the addition of oxygenated species to diesel fuel to reduce soot emissions. This work indicates that the primary role of oxygen atoms in the fuel mixture is to reduce the levels of carbon atoms available for soot formation by fixing them in the form of CO or COz. When the structure of the oxygenate leads to prompt and direct formation of CO2, the oxygenate is less effective in reducing soot production than in cases when all fuel-bound 0 atoms produce only CO. The kinetic and molecular structure principles leading to this conclusion are described.
Book Synopsis Experimental and Computational Study of Soot Formation Under Diesel Engine Conditions by : Ioannis Kitsopanidis
Download or read book Experimental and Computational Study of Soot Formation Under Diesel Engine Conditions written by Ioannis Kitsopanidis and published by . This book was released on 2004 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) Oxygenates totally suppress soot formation at or above 30% oxygen in fuel by mass. Since soot formation is kinetically limited at lower temperatures and soot precursors are not thermodynamically stable at higher temperatures, soot yield exhibits a bell-shape dependence on temperature with a maximum at approximately 1800-2000K. Thus different surface growth mechanisms prevail across the temperature range; the relative contribution of C2H2 over PAH to soot growth increases with temperature. Even though nucleation is mostly governed by PAH coalescence, it was found that the C2H2 route is not negligible under certain conditions. The kinetics of fuel-rich combustion was found to be sensitive to the fuel+HOO reaction. Suggestions are made for better correlation between model and experiments regarding ignition delay and rate of heat release. While performing this study, insight was gained into RCM operation. Assuming uniform and homogeneous environment at the end of compression, was sufficient to model ignition delays under most conditions (2-10 ms), but not rate of heat release and maximum pressure. CFD analysis predicted non-negligible temperature stratification at the end of compression ( -80% of mass within 50K). A multizone model, taking into account zones of constant mass and allowing heat transfer and flow into the crevice, was developed and improved the agreement significantly.
Book Synopsis Effects of Diesel Fuel Combustion-modifier Additives on In-cylinder Soot Formation in a Heavy-duty Dl Diesel Engine by : Mark P. Musculus
Download or read book Effects of Diesel Fuel Combustion-modifier Additives on In-cylinder Soot Formation in a Heavy-duty Dl Diesel Engine written by Mark P. Musculus and published by . This book was released on 2005 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a phenomenological model of diesel combustion and pollutant-formation processes, a number of fuel additives that could potentially reduce in-cylinder soot formation by altering combustion chemistry have been identified. These fuel additives, or ''combustion modifiers'', included ethanol and ethylene glycol dimethyl ether, polyethylene glycol dinitrate (a cetane improver), succinimide (a dispersant), as well as nitromethane and another nitro-compound mixture. To better understand the chemical and physical mechanisms by which these combustion modifiers may affect soot formation in diesel engines, in-cylinder soot and diffusion flame lift-off were measured, using an optically-accessible, heavy-duty, direct-injection diesel engine. A line-of-sight laser extinction diagnostic was employed to measure the relative soot concentration within the diesel jets (''jetsoot'') as well as the rates of deposition of soot on the piston bowl-rim (''wall-soot''). An OH chemiluminescence imaging technique was utilized to measure the lift-off lengths of the diesel diffusion flames so that fresh oxygen entrainment rates could be compared among the fuels. Measurements were obtained at two operating conditions, using blends of a base commercial diesel fuel with various combinations of the fuel additives. The ethanol additive, at 10% by mass, reduced jet-soot by up to 15%, and reduced wall-soot by 30-40%. The other fuel additives also affected in-cylinder soot, but unlike the ethanol blends, changes in in-cylinder soot could be attributed solely to differences in the ignition delay. No statistically-significant differences in the diesel flame lift-off lengths were observed among any of the fuel additive formulations at the operating conditions examined in this study. Accordingly, the observed differences in in-cylinder soot among the fuel formulations cannot be attributed to differences in fresh oxygen entrainment upstream of the soot-formation zones after ignition.
Book Synopsis Soot Formation in GDI/GTDI Engines by :
Download or read book Soot Formation in GDI/GTDI Engines written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A semi-detailed soot model was successfully implemented in the KIVA3v2-ERC code, which features a discrete multi-component (DMC) fuel vaporization model. A spark ignition model and the G-equation turbulent flame propagation model were also implemented for modeling direct-injection spark-ignition (DISI) engines. Chemistry parallelization for the soot model was also successfully realized in this work. Chemistry parallelization and a newly developed chemistry solver (SpeedCHEM) further reduced the computational time and enabled the successful application of the final code (KIVA-DMC-detsoot-G-SC) to DISI engines with the consideration of multi-component surrogates for real gasoline fuels and 3-D full cylinder engine grids. The semi-detailed soot model considered: soot inception from a four-ring aromatic (A4), soot surface growth through acetylene (C2H2) and aromatics from single-ring to four-ring species (A1, A2, A3, A4), soot coagulation, and soot oxidation through O2 and OH. A reduced polycyclic aromatic hydrocarbon (PAH) chemistry mechanism was coupled with n-heptane, iso-octane and toluene chemistry mechanisms. The combination of the chemistry mechanisms and the soot model was then validated based on experiments in terms of ignition delay, fundamental premixed flames, SANDIA constant volume chamber spray combustion. The pyrolysis process is also a significant process for soot formation at the conditions of DISI engines. Important species for soot formation from toluene pyrolysis processes were also validated based on experiments, and then coupled with the current n-heptane/iso-octane/toluene/PAH chemistry mechanisms for application to DISI engines. The vaporization of wall films plays a significant role in soot formation and a grid-independent wall film vaporization model was formulated for predicting soot emissions near wall films Predicted in-cylinder pressure and particle size distributions (PSDs) were compared to available premixed engine experimental studies. Quantitative agreements of in-cylinder particle distributions are also obtained. The improved models were then applied to studies of soot emissions from early- and late-injection strategies in a four-valve single-cylinder gasoline DISI engine, and the trends were consistent with literature or experimental data.
Book Synopsis Combustion and In-cylinder Soot Formation Characteristics of a Neat GTL-fueled DI Diesel Engine by : Salih Manasra
Download or read book Combustion and In-cylinder Soot Formation Characteristics of a Neat GTL-fueled DI Diesel Engine written by Salih Manasra and published by . This book was released on 2012-01-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is interest in a substitution of conventional diesel fuel by alternative hydrocarbons. For example natural gas can be converted into liquid hydrocarbons using the Fischer-Tropsch process. Resulting Gas-To-Liquid (GTL) fuels may have considerable advantages with respect to their combustion. GTL fuels are appropriate for conventional diesel engines provided their operation is modified. In this context the injection strategy including injection timing and pressure is most important for the combustion process and resulting pollutants. In his experiments, the author has studied injection and combustion of GTL fuels. His investigations were focused on observing, characterizing and comparing soot formation in GTL fueled diesel engines.
Book Synopsis Optimization Methods for the Mixture Formation and Combustion Process in Diesel Engines by : Jost Weber
Download or read book Optimization Methods for the Mixture Formation and Combustion Process in Diesel Engines written by Jost Weber and published by Cuvillier Verlag. This book was released on 2008 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt:
