Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions write by National Aeronautics and Space Adm Nasa. This book was released on 2018-11-12. Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions available in PDF, EPUB and Kindle. 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...
Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions
Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions write by National Aeronautics and Space Administration (NASA). This book was released on 2018-07-17. Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions available in PDF, EPUB and Kindle. 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...
Three-dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions
Three-dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Three-dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions write by R. D. Reitz. This book was released on 1992. Three-dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions available in PDF, EPUB and Kindle.
Three Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions
Three Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Three Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions write by R. D. Reitz. This book was released on 1991. Three Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions available in PDF, EPUB and Kindle.
Modelling Diesel Combustion
Modelling Diesel Combustion - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Modelling Diesel Combustion write by P. A. Lakshminarayanan. This book was released on 2010-03-03. Modelling Diesel Combustion available in PDF, EPUB and Kindle. 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.
