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The Influence Of In Cylinder Flows On The Flame Kernel Growth In Natural Gas Fuelled Spark Ignition Engines
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Book Synopsis The Influence of In-cylinder Flows on the Flame Kernel Growth in Natural Gas Fuelled Spark Ignition Engines by : Richard J. Ancimer
Download or read book The Influence of In-cylinder Flows on the Flame Kernel Growth in Natural Gas Fuelled Spark Ignition Engines written by Richard J. Ancimer and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this work was to determine the influence of in-cylinder flows on the natural gas combustion process in configurations representative of light duty vehicle spark ignition engines. Specifically, the influence of the flow field on the flame kernel development period was of interest. The interactions between the flow field and the combustion process were quantified by correlating characteristic in-cylinder fluid flow and mass burn rate parameters. The fluid motion, flame kernel development and the overall combustion duration were characterised using: (i) a two-component laser Doppler velocimeter for the in-cylinder fluid flow, (ii) a fibre-optic instrumented spark plug for the flame kernel growth rate, and (iii) a piezo-electric pressure transducer for the in-cylinder pressure from which the overall mass burn rate data is obtained. The measurements were made on an individual cycle basis. Results from a single cylinder V6 optical engine are reported. Physical interpretations of: (i) the flow field evolution and (ii) the interactions between the flow field and the natural gas combustion process are presented. The main contributions of this work are through: (i) the application of novel data processing techniques, and (ii) the exploration of the fibre-optic instrumented spark plug as a measurement technique in high swirl engines. For example, the discrete wavelet transform is used to show: (i) the energy cascade process in the non-stationary engine flow field over crank angle phase and frequency; and (ii) how the flow field evolution influences the early stages of the natural gas combustion process. The fibre-optic instrumented spark plug is shown to measure a mass-weighted velocity. Data from the fibre-optic instrumented spark plug data are shown to be biased by the large convection velocities in high swirl engines. This work provides the foundation upon which further investigations into the influence of different in-cylinder flows on the natural gas combustion process in spark ignition engines can be based.
Book Synopsis The Influence of In-cylinder Flows on the Flame Kernel Growth in Natural Gas Fuelled Spark Ignition Engines by :
Download or read book The Influence of In-cylinder Flows on the Flame Kernel Growth in Natural Gas Fuelled Spark Ignition Engines written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Richard J. Ancimer Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612537927 Total Pages :410 pages Book Rating :4.5/5 (379 download)
Book Synopsis The Influence of In-cylinder Flows on the Flame Kernel Growth in Natural Gas Fuelled Spark Ignition Engines [microform] by : Richard J. Ancimer
Download or read book The Influence of In-cylinder Flows on the Flame Kernel Growth in Natural Gas Fuelled Spark Ignition Engines [microform] written by Richard J. Ancimer and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2000 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis THE INTERACTION OF IGNITION AND IN-CYLINDER FLOW ON FLAME KERNEL DEVELOPMENT AND ITS IMPACTS ON COMBUSTION IN AN OPTICALLY ACCESSIBLE DIRECT INJECTION ENGINE by :
Download or read book THE INTERACTION OF IGNITION AND IN-CYLINDER FLOW ON FLAME KERNEL DEVELOPMENT AND ITS IMPACTS ON COMBUSTION IN AN OPTICALLY ACCESSIBLE DIRECT INJECTION ENGINE written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : A significant challenge facing spark-ignited (SI) engines to achieve higher efficiency via highly diluted combustion is the quickly increased combustion instability as the dilution level increases. The flow motion variation has been identified as a dominant factor that introduces combustion variability at highly diluted conditions. However, the detailed mechanism of how the variation in flow motion impacts the flame kernel development and introduces combustion instability is only partially understood. This research investigated the impacts of the in-cylinder flow on variability of the ignition and early flame kernel development in a single cylinder direct-injection spark-ignition (DI-SI) optically accessible engine and accessory test benches. Firstly, different types of spark plug electrode designs were studied on a spark plug flow fixture bench. The results showed that the impacts of incoming flow on the ignition output vary as the incoming flow direction is changed. The ignition energy drops and discharge duration prolongs as the incoming flow is blocked by any part of the electrodes. Secondly, the flow motion near the spark plug region was investigated in an optical engine through high-speed imaging of the spark discharge arc stretching and flow field measurement via particle imaging velocimetry. It was observed that at motored conditions there is a consistent trend that the flow can change direction from the bulk motion as the piston approaches the top dead center (TDC). The transition of flow direction near the spark plug is a source of variability in initial flame kernel convection and propagation. It was found that by increasing the tumble motion, the transition window can be retarded later in the cycle. Lastly, the impacts of the unstable incylinder flow motion on the flame kernel initiation and development was studied at both diluted and stoichiometric conditions. The 2D and 1D probability distribution functions of the flame kernel indicated that the reversed flow direction near the spark plug at ignition timing results in smaller and less stretched flame kernels, which are a source of combustion variability. As the tumble level is increased, the window where the transition of flow direction occurs near the spark plug also changes. This research indicates that, at the studied loads and speeds, higher tumble level helps maintain a consistent flow motion near the spark plug at the ignition timing, which results in faster growing flame kernels.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2001 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow and Combustion in Reciprocating Engines by : C. Arcoumanis
Download or read book Flow and Combustion in Reciprocating Engines written by C. Arcoumanis and published by Springer Science & Business Media. This book was released on 2009-06-29 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimization of combustion processes in automotive engines is a key factor in reducing fuel consumption. This book, written by eminent university and industry researchers, investigates and describes flow and combustion processes in diesel and gasoline engines.
Book Synopsis Modelling Spark Ignition Combustion by : P. A. Lakshminarayanan
Download or read book Modelling Spark Ignition Combustion written by P. A. Lakshminarayanan and published by Springer Nature. This book was released on with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Racing and High-Performance Engines 1998-2003 by : Daniel J Holt
Download or read book Design of Racing and High-Performance Engines 1998-2003 written by Daniel J Holt and published by SAE International. This book was released on 2003-08-05 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 53 technical papers in this book show the improvements and design techniques that researchers have applied to performance and racing engines. They provide an insight into what the engineers consider to be the top improvements needed to advance engine technology; and cover subjects such as: 1) Direct injection; 2) Valve spring advancements; 3) Turbocharging; 4) Variable valve control; 5) Combustion evaluation; and 5) New racing engines.
Book Synopsis FLUID MOTION: EFFECT ON CYCLE-TO-CYCLE COMBUSTION VARIATION, FLAME DEVELOPMENT, AND SPARK DELIVERY IN SPARK-IGNITION ENGINES. by : PHILIP SHAFER KELLER
Download or read book FLUID MOTION: EFFECT ON CYCLE-TO-CYCLE COMBUSTION VARIATION, FLAME DEVELOPMENT, AND SPARK DELIVERY IN SPARK-IGNITION ENGINES. written by PHILIP SHAFER KELLER and published by . This book was released on 1991 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: in the determination of the cycle-resolved mean velocity, the greater the correlation.
Book Synopsis Effect of Turbulence on Flame Initiation and Combustion Cyclic Variation in Spark Ignition Engines by : Mazen Hammoud
Download or read book Effect of Turbulence on Flame Initiation and Combustion Cyclic Variation in Spark Ignition Engines written by Mazen Hammoud and published by . This book was released on 1996 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress in Combustion Diagnostics, Science and Technology by : Paul Medwell
Download or read book Progress in Combustion Diagnostics, Science and Technology written by Paul Medwell and published by MDPI. This book was released on 2020-03-25 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role that combustion plays in the world’s energy systems will continue to evolve with the changes in technological demands. For example, the challenges that we face today are more focused on the conservation of energy and addressing environmental concerns, which together necessitate cleaner and more efficient combustion processes using a range of fuel sources. This book includes contributions to highlight the recent progress in theory and experiments, development, and demonstration of technologies and systems involving combustion processes, for the production, storage, use, and conservation of energy.
Book Synopsis Natural Gas Engines by : Kalyan Kumar Srinivasan
Download or read book Natural Gas Engines written by Kalyan Kumar Srinivasan and published by Springer. This book was released on 2018-11-03 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the various advanced reciprocating combustion engine technologies that utilize natural gas and alternative fuels for transportation and power generation applications. It is divided into three major sections consisting of both fundamental and applied technologies to identify (but not limited to) clean, high-efficiency opportunities with natural gas fueling that have been developed through experimental protocols, numerical and high-performance computational simulations, and zero-dimensional, multizone combustion simulations. Particular emphasis is placed on statutes to monitor fine particulate emissions from tailpipe of engines operating on natural gas and alternative fuels.
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 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Spark Ignited Turbulent Flame Kernel Growth. Annual Report, January--December, 1992 by :
Download or read book Spark Ignited Turbulent Flame Kernel Growth. Annual Report, January--December, 1992 written by and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyclic combustion variations in spark-ignition engines limit the use of dilute charge strategies for achieving low NO(subscript x) emissions and improved fuel economy. Results from an experimental study of the effect of incomplete fuel-air mixing (ifam) on spark-ignited flame kernel growth in turbulent propane-air mixtures are presented. The experiments were conducted in a turbulent flow system that allows for independent variation of flow parameters, ignition system parameters, and the degree of fuel-air mixing. Measurements were made at 1 atm and 300 K conditions. Five cases were studied; a premixed and four incompletely mixed cases with 6%, 13%, 24% and 33% RMS (root-mean-square) fluctuations in the fuel/air equivalence ratio. High speed laser shadowgraphy at 4,000 frames-per-second was used to record flame kernel growth following spark ignition, from which the equivalent flame kernel radius as a function of time was determined. The effect of ifam was evaluated in terms of the flame kernel growth rate, cyclic variations in the flame kernel growth, and the rate of misfire. The results show that fluctuations in local mixture strength due to ifam cause the flame kernel surface to become wrinkled and distorted; and that the amount of wrinkling increases as the degree of ifam. Ifam was also found to result in a significant increase in cyclic variations in the flame kernel growth. The average flame kernel growth rates for the premixed and the incompletely mixed cases were found to be within the experimental uncertainty except for the 33%-RMS-fluctuation case where the growth rate is significantly lower. The premixed and 6%-RMS-fluctuation cases had a 0% misfire rate. The misfire rates were 1% and 2% for the 13%-RMS-fluctuation and 24%-RMS-fluctuation cases, respectively; however, it drastically increased to 23% in the 33%-RMS-fluctuation case.
Book Synopsis Two-Stroke Cycle Engine by : JohnB. Heywood
Download or read book Two-Stroke Cycle Engine written by JohnB. Heywood and published by Routledge. This book was released on 2017-11-01 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the two-stroke cycle internal combustion engine, used in compact, lightweight form in everything from motorcycles to chainsaws to outboard motors, and in large sizes for marine propulsion and power generation. It first provides an overview of the principles, characteristics, applications, and history of the two-stroke cycle engine, followed by descriptions and evaluations of various types of models that have been developed to predict aspects of two-stroke engine operation.
Book Synopsis Proceedings of the 4th International Congress of Automotive and Transport Engineering (AMMA 2018) by : Nicolae Burnete
Download or read book Proceedings of the 4th International Congress of Automotive and Transport Engineering (AMMA 2018) written by Nicolae Burnete and published by Springer. This book was released on 2018-09-29 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes selected and reviewed papers from the 4th International Congress of Automotive and Transport Engineering, held in Cluj, Romania, in September 2018. Authors are experts from research, industry and universities coming from 14 countries worldwide. The papers are covering the latest developments in automotive vehicles and environment, advanced transport systems and road traffic, heavy and special vehicles, new materials, manufacturing technologies and logistics, accident research and analysis and innovative solutions for automotive vehicles. The conference is organized by SIAR (Society of Automotive Engineers from Romania) in cooperation with FISITA.
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