Download and read online Mixture Formation in Internal Combustion Engines in PDF and EPUB A systematic control of mixture formation with modern high-pressure injection systems enables us to achieve considerable improvements of the combustion pr- ess in terms of reduced fuel consumption and engine-out raw emissions. However, because of the growing number of free parameters due to more flexible injection systems, variable valve trains, the application of different combustion concepts within different regions of the engine map, etc., the prediction of spray and m- ture formation becomes increasingly complex. For this reason, the optimization of the in-cylinder processes using 3D computational fluid dynamics (CFD) becomes increasingly important. In these CFD codes, the detailed modeling of spray and mixture formation is a prerequisite for the correct calculation of the subsequent processes like ignition, combustion and formation of emissions. Although such simulation tools can be viewed as standard tools today, the predictive quality of the sub-models is c- stantly enhanced by a more accurate and detailed modeling of the relevant pr- esses, and by the inclusion of new important mechanisms and effects that come along with the development of new injection systems and have not been cons- ered so far. In this book the most widely used mathematical models for the simulation of spray and mixture formation in 3D CFD calculations are described and discussed. In order to give the reader an introduction into the complex processes, the book starts with a description of the fundamental mechanisms and categories of fuel - jection, spray break-up, and mixture formation in internal combustion engines.
Download and read online Handbuch Verbrennungsmotor in PDF and EPUB Dieses Werk enthält auf über 1200 Seiten umfassende Informationen über Otto- und Dieselmotoren. In wissenschaftlich anschaulicher und gleichzeitig praxisrelevanter Form sind die Grundlagen, Komponenten, Systeme und Perspektiven dargestellt. Über 140 Autoren aus Theorie und Praxis haben dieses Wissen erarbeitet. Damit haben sowohl Theoretiker als auch Praktiker die Möglichkeit, sich in kompakter Form ausführlich über den neuesten Stand der Motorentechnik zu informieren. Neue Entwicklungen zur Hybridtechnik und alternativen Antrieben wurden aktualisiert. Das Literaturverzeichnis wurde auf über 1400 Stellen erweitert.
Download and read online Numerical and Experimental Investigation of Water Introduction Into DI Diesel Engine Combustion in PDF and EPUB
Download and read online Urea SCR Technology for deNOx After Treatment of Diesel Exhausts in PDF and EPUB Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts presents a complete overview of the selective catalytic reduction of NOx by ammonia/urea. The book starts with an illustration of the technology in the framework of the current context (legislation, market, system configurations), covers the fundamental aspects of the SCR process (catalysts, chemistry, mechanism, kinetics) and analyzes its application to useful topics such as modeling of full scale monolith catalysts, control aspects, ammonia injections systems and integration with other devices for combined removal of pollutants.
Download and read online Untersuchung der Potentiale der numerischen Str mungsberechnung zur Prognose der Partikelemissionen in Ottomotoren mit Direkteinspritzung in PDF and EPUB Fabian Köpple stellt einen durchgängigen Ansatz zur 3D-Berechnung der innermotorischen Vorgänge in Ottomotoren mit Direkteinspritzung vor. Dabei konnte er zeigen, dass unter Verwendung des erarbeiteten Modellierungskonzeptes die Auswirkungen verschiedener, die Gemischbildung und Verbrennung beeinflussender Parameter auf die Rußemissionen bewertet werden können. Da die verzögerte Verdunstung des an der Wand abgelagerten Kraftstoffs eine wesentliche Quelle der Rußemissionen ist, war die besondere Berücksichtigung der Modellierung der Spray-Wand-Interaktion ein wichtiger Aspekt dieser Dissertation. Insbesondere die Oberflächentemperatur des Kolbens hat dabei einen wichtigen Einfluss auf die Spray-Wand-Interaktion, weshalb der Autor Oberflächentemperaturmessungen auf dem Kolben eines Einzylinderaggregats durchführte. Insgesamt konnte durch den hier vorgestellten Ansatz die Prognose der Partikelemissionen mittels der numerischen Simulation deutlich verbessert werden.
Download and read online Simulation of a Hydrogen Internal Combustion Engine with Cryogenic Mixture Formation in PDF and EPUB
Download and read online Modeling Engine Spray and Combustion Processes in PDF and EPUB The utilization of mathematical models to numerically describe the performance of internal combustion engines is of great significance in the development of new and improved engines. Today, such simulation models can already be viewed as standard tools, and their importance is likely to increase further as available com puter power is expected to increase and the predictive quality of the models is constantly enhanced. This book describes and discusses the most widely used mathematical models for in-cylinder spray and combustion processes, which are the most important subprocesses affecting engine fuel consumption and pollutant emissions. The relevant thermodynamic, fluid dynamic and chemical principles are summarized, and then the application of these principles to the in-cylinder processes is ex plained. Different modeling approaches for the each subprocesses are compared and discussed with respect to the governing model assumptions and simplifica tions. Conclusions are drawn as to which model approach is appropriate for a specific type of problem in the development process of an engine. Hence, this book may serve both as a graduate level textbook for combustion engineering stu dents and as a reference for professionals employed in the field of combustion en gine modeling. The research necessary for this book was carried out during my employment as a postdoctoral scientist at the Institute of Technical Combustion (ITV) at the Uni versity of Hannover, Germany and at the Engine Research Center (ERC) at the University of Wisconsin-Madison, USA.
Download and read online Modellierung der Multikomponenten Verdampfung im homogenisierten dieselmotorischen Brennverfahren in PDF and EPUB
Download and read online Handbook of Air Pollution from Internal Combustion Engines in PDF and EPUB This handbook is an important and valuable source for engineers and researchers in the area of internal combustion engines pollution control. It provides an excellent updated review of available knowledge in this field and furnishes essential and useful information on air pollution constituents, mechanisms of formation, control technologies, effects of engine design, effects of operation conditions, and effects of fuel formulation and additives. The text is rich in explanatory diagrams, figures and tables, and includes a considerable number of references. An important resource for engineers and researchers in the area of internal combustion engines and pollution control Presents and excellent updated review of the available knowledge in this area Written by 23 experts Provides over 700 references and more than 500 explanatory diagrams, figures and tables
Download and read online Analytic Combustion in PDF and EPUB Combustion involves change in the chemical state of a substance from a fuel-state to a product-state via chemical reaction accompanied by release of heat energy. Design or performance evaluation of equipment also requires knowledge of the rate of change of state. This rate is governed by the laws of thermodynamics and by the empirical sciences of heat and mass transfer, chemical kinetics and fluid dynamics. Analytic Combustion is written for advanced undergraduates, graduate students and professionals in mechanical, aeronautical and chemical engineering. Topics were carefully selected and presented to facilitate learning with emphasis on effective mathematical formulations and solution strategies. The book features over 60 solved numerical problems and analytical derivations and nearly 145 end-of-chapter exercise problems. The presentation is gradual, starting from thermodynamics of pure and mixture substances, and chemical equilibrium, building to a uniquely strong chapter on application case studies.
Download and read online Kyoto University Bulletin in PDF and EPUB
Download and read online Thermo and Fluid dynamic Processes in Diesel Engines in PDF and EPUB This volume includes versions of papers selected from those presented at the THIESEL 2000 Conference on Thermofluidynamic Processes in Diesel Engines, held at the Universidad Politecnica de Valencia, during the period of September th th 13 to 15 , 2000. The papers are grouped into seven thematic areas: State of the Art and Prospective, Fuels for Diesel Engines, Injection System and Spray Formation, Combustion and Pollutant Formation, Modelling, Experimental Techniques, and Air Management. These areas cover most of the technologies and research strategies that may allow Light Duty and Heavy Duty Diesel engines to comply with current and forthcoming emission standards, while maintaining or improving fuel consumption. The main objectives of the conference were to bring together ideas and experience from Industry and Universities to facilitate interchange of information and to promote discussion of future research and development needs. The technical papers emphasised the use diagnostic and simulation techniques and their relationship to engineering practice and the advancement of the Diesel engine. We hope that this approach, which proved to be successful at the Conference, is reflected in this volume. We thank all those who contributed to the success of the Conference, and particularly the members of the Advisory Committee who assessed abstracts and chaired many of the technical sessions. Weare also grateful to participants who presented their work or contributed to the many discussions. Finally, the Conference benefitted from financial support from the organisations listed below and we are glad to have this opportunity to record our gratitude.
Download and read online Fluid und W rmetransport Str mungslehre in PDF and EPUB Das Buch "Strömungslehre" ist Teil des zweibändigen Werkes "Fluid- und Wärmetransport" und behandelt die Grundlagen der Fluiddynamik. Der Umfang entspricht dem Stoff einer einsemestrigen Vorlesung. Einzelne Kapitel werden durch Aufgaben ergänzt, im Anhang befindet sich eine Sammlung mit den wichtigsten Formeln der Strömungslehre. Das Buch ist damit als Lehrbuch wie auch als Nachschlagewerk für den in der Praxis stehenden Ingenieur geeignet.
Download and read online Internal Combustion Engines in PDF and EPUB This book presents an energetic approach to the performance analysis of internal combustion engines, seen as attractive applications of the principles of thermodynamics, fluid mechanics and energy transfer. Paying particular attention to the presentation of theory and practice in a balanced ratio, the book is an important aid both for students and for technicians, who want to widen their knowledge of basic principles required for design and development of internal combustion engines. New engine technologies are covered, together with recent developments in terms of: intake and exhaust flow optimization, design and development of supercharging systems, fuel metering and spray characteristic control, fluid turbulence motions, traditional and advanced combustion process analysis, formation and control of pollutant emissions and noise, heat transfer and cooling, fossil and renewable fuels, mono- and multi-dimensional models of termo-fluid-dynamic processes.
Download and read online Energy and Combustion Science in PDF and EPUB Energy and Combustion Science is a collection of papers that covers advancement in the field of energy and combustion science. The materials presented in the book are organized thematically into parts. The text first covers the issues, concerns, problems of the contemporary combustion technology. The subsequent parts of the book cover various areas in combustions science, namely, pollution, gas, oil, coal, and engines. Most of the articles in the book are concerned with the byproduct of fuel combustion. The text will be of great use to students, researchers, and practitioners of disciplines that deal with the energy and combustion technology.