A Theoretical and Experimental Study of Emissions Modeling for Diesel Engines with Comparisons to In-cylinder Imaging PDF Download
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Author: Gregory James Hampson
Publisher:
ISBN:
Category :
Languages : en
Pages : 618
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Book Description
Typescript.
Author: Gregory James Hampson
Publisher:
ISBN:
Category :
Languages : en
Pages : 618
Get Book Here
Book Description
Typescript.
Author: Gregory James Hampson
Publisher:
ISBN:
Category :
Languages : en
Pages : 674
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Book Description
Author: P. A. Lakshminarayanan
Publisher: Springer Nature
ISBN: 981166742X
Category : Technology & Engineering
Languages : en
Pages : 419
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Book Description
This book comprehensively discusses diesel combustion phenomena like ignition delay, fuel-air mixing, rate of heat release, and emissions of smoke, particulate and nitric oxide. It enables quantitative evaluation of these important phenomena and parameters. Most importantly, it attempts to model them with constants that are independent of engine types and hence they could be applied by the engineers and researchers for a general engine. This book emphasizes the importance of the spray at the wall in precisely describing the heat release and emissions for most of the engines on and off-road. It gives models for heat release and emissions. Every model is thoroughly validated by detailed experiments using a broad range of engines. The book describes an elegant quasi-one-dimensional model for heat release in diesel engines with single as well as multiple injections. The book describes how the two aspects, namely, fuel injection rate and the diameter of the combustion bowl in the piston, have enabled meeting advanced emission, noise, and performance standards. The book also discusses the topics of computational fluid dynamics encompassing RANS and LES models of turbulence. Given the contents, this book will be useful for students, researchers and professionals working in the area of vehicle engineering and engine technology. This book will also be a good professional book for practising engineers in the field of combustion engines and automotive engineering.
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781731186041
Category : Science
Languages : en
Pages : 74
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Book Description
A three-dimensional computer code (KIVA) is being modified to include state-of-the-art submodels for diesel engine flow and combustion: spray atomization, drop breakup/coalescence, multi-component fuel vaporization, spray/wall interaction, ignition and combustion, wall heat transfer, unburned HC and NOx formation, soot and radiation, and the intake flow process. Improved and/or new submodels which were completed are: wall heat transfer with unsteadiness and compressibility, laminar-turbulent characteristic time combustion with unburned HC and Zeldo'vich NOx, and spray/wall impingement with rebounding and sliding drops. Results to date show that adding the effects of unsteadiness and compressibility improves the accuracy of heat transfer predictions; spray drop rebound can occur from walls at low impingement velocities (e.g., in cold-starting); larger spray drops are formed at the nozzle due to the influence of vaporization on the atomization process; a laminar-and-turbulent characteristic time combustion model has the flexibility to match measured engine combustion data over a wide range of operating conditions; and finally, the characteristic time combustion model can also be extended to allow predictions of ignition. The accuracy of the predictions is being assessed by comparisons with available measurements. Additional supporting experiments are also described briefly. To date, comparisons with measured engine cylinder pressure and heat flux data were made for homogeneous charge, spark-ignited and compression-ignited engines. The model results are in good agreement with the experiments. Reitz, R. D. and Rutland, C. J. Unspecified Center...
Author: Song-Charng Kong
Publisher:
ISBN:
Category :
Languages : en
Pages : 350
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Book Description
Author: Dr.-Ing. David Blanco-Rodriguez
Publisher: Springer
ISBN: 3319067370
Category : Technology & Engineering
Languages : en
Pages : 197
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Book Description
The book presents a complete new methodology for the on-board measurements and modeling of gas concentrations in turbocharged diesel engines. It provides the readers with a comprehensive review of the state-of-art in NOx and lambda estimation and describes new important achievements accomplished by the author. These include: the online characterization of lambda and NOx sensors; the development of control-oriented models of lambda and NOx emissions; the design of computationally efficient updating algorithms; and, finally, the application and evaluation of the methods on-board. Because of its technically oriented approach and innovative findings on both control-oriented algorithms and virtual sensing and observation, this book offers a practice-oriented guide for students, researchers and professionals working in the field of control and information engineering.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Development of models for direct injection diesel performance and emissions Of NOx and soot are the goals of this research. The simplest models investigated are flame temperature correlations. These correlations are semi-empirical tools that provide insight into the effects of dilution on NOx, particulate, and HC emissions and can be used by the design or calibration engineer to reduce the number of engine tests required. A characteristic time model for NOx emissions bas been used to study the mixing processes in diesel engines and extended to study multiple injections, water/steam dilution, and the results of NO injection tests. This NOx model was also modified to calculate the NO formed in the cylinder as a function of time and was shown to correlate engine-out NOx emissions for four diesel engines. Development of a cycle simulation code is also underway. Primary emphasis bas been placed on the study of the ignition and combustion submodels for this code.
Author: Cathy Youngmi Choi
Publisher:
ISBN:
Category :
Languages : en
Pages : 610
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Book Description
Author: Emrah Cihan Çebi
Publisher:
ISBN: 9783844017410
Category :
Languages : en
Pages : 157
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Book Description
Author: William L. Hardy
Publisher:
ISBN:
Category :
Languages : en
Pages : 494
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Book Description
