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Model For Prediction Of Incylinder And Exhaust Soot Emissions From Direct Injection Diesel Engines
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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 Model for Prediction of Incylinder and Exhaust Soot Emissions from Direct Injection Diesel Engines by : P. S. Mehta
Download or read book Model for Prediction of Incylinder and Exhaust Soot Emissions from Direct Injection Diesel Engines written by P. S. Mehta and published by . This book was released on 1988 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Simulation of the Diesel Engine Combustion Process Using the Stochastic Reactor Model by : Michal Pasternak
Download or read book Simulation of the Diesel Engine Combustion Process Using the Stochastic Reactor Model written by Michal Pasternak and published by Logos Verlag Berlin. This book was released on 2016 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present work is concerned with the simulation of combustion, emission formation and fuel effects in Diesel engines. The simulation process is built around a zero-dimensional (0D) direct injection stochastic reactor model (DI-SRM), which is based on a probability density function (PDF) approach. An emphasis is put on the modelling of mixing time to improve the representation of turbulence-chemistry interactions in the 0D DI-SRM. The mixing time model describes the intensity of mixing in the gas-phase for scalars such as enthalpy and species mass fraction. On a crank angle basis, it governs the composition of the gas mixture that is described by PDF distributions for the scalars. The derivation of the mixing time is based on an extended heat release analysis that has been fully automated using a genetic algorithm. The predictive nature of simulations is achieved through the parametrisation of the mixing time model with known engine operating parameters such as speed, load and fuel injection strategy. It is shown that crank angle dependency of the mixing time improves the modelling of local inhomogeneity in the gas-phase for species mass fraction and temperature. In combination with an exact treatment of the non-linearity of reaction kinetics, it enables an accurate prediction of the rate of heat release, in-cylinder pressure and exhaust emissions, such as nitrogen oxides, unburned hydrocarbons and soot, from differently composed fuels. The method developed is particularly tailored for computationally efficient applications that focus on the details of reaction kinetics and the locality of combustion and emission formation in Diesel engines.
Book Synopsis Soot and NO(x) Emissions and Combustion Characteristics of Low Heat Rejection Direct Injection Diesel Engines by :
Download or read book Soot and NO(x) Emissions and Combustion Characteristics of Low Heat Rejection Direct Injection Diesel Engines written by and published by . This book was released on 1994 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance and emissions data were gathered on a normally aspirated single cylinder DI engine with various combinations of ceramic coatings installed. Thin ceramic thermal barrier coatings were applied to the piston crown and bowl, the head and valves, and the cylinder liner. The coated piston and head were run singly and in combination with the cylinder liner to investigate the effects of these different coated surfaces on emissions and performance. Coating the piston crown alone results in generally lower cylinder pressure, lower brake specific fuel consumption and lower NO(x) emission compared to the baseline engine. Soot emission is typically increased below 2000 RPM and decreased above 2000 RPM. Coating the head alone reduces cylinder pressure, but generally increases specific fuel consumption and NO(x) and soot emission. The KIVA-II code was used to model the Hydra engine with the thermal coatings. The computer modeling has led to an understanding of the effect of coating the piston on NO production. The hotter piston crown warms the intake air, shortening ignition delay and decreasing the ratio of premixed to diffusion combustion, ultimately resulting III lower peak cylinder temperature and reduced NO. The KIVA-II results agree reasonably well with the experimental data for cylinder pressure and NO and soot emission. Diesel combustion, Low heat rejection engines, NO(x) Emission, Soot emission, Thermal barrier coatings.
Book Synopsis A Stochastic Mixing Model for Prediction Emissions in a Direct Injection Diesel Engine by : Alan Jeffrey Brown
Download or read book A Stochastic Mixing Model for Prediction Emissions in a Direct Injection Diesel Engine written by Alan Jeffrey Brown and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling Combustion and Soot Emissions in a Small Bore Direct Injection Diesel Engine by : Carl-Anders Hergart
Download or read book Modeling Combustion and Soot Emissions in a Small Bore Direct Injection Diesel Engine written by Carl-Anders Hergart and published by . This book was released on 2001 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis STOCHASTIC COMBUSTION MODELING OF DIRECT INJECTION DIESEL ENGINES. by : Yun Xiao
Download or read book STOCHASTIC COMBUSTION MODELING OF DIRECT INJECTION DIESEL ENGINES. written by Yun Xiao and published by . This book was released on 1991 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new coalescence/dispersion model for stochastic turbulent mixings is proposed. The new model provides a more realistic description of the initial phase of mixing which strongly affects burn rate predictions.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722842208 Total Pages :66 pages Book Rating :4.8/5 (422 download)
Book Synopsis Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions-2 by : National Aeronautics and Space Administration (NASA)
Download or read book Three-Dimensional Modeling of Diesel Engine Intake Flow, Combustion and Emissions-2 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three-dimensional computer code, KIVA, is being modified to include state-of-the-art submodels for diesel engine flow and combustion. Improved and/or new submodels which have already been implemented and previously reported are: wall heat transfer with unsteadiness and compressibility, laminar-turbulent characteristic time combustion with unburned HC and Zeldo'vich NO(x), and spray/wall impingement with rebounding and sliding drops. Progress on the implementation of improved spray drop drag and drop breakup models, the formulation and testing of a multistep kinetics ignition model, and preliminary soot modeling results are described. In addition, the use of a block structured version of KIVA to model the intake flow process is described. A grid generation scheme was developed for modeling realistic (complex) engine geometries, and computations were made of intake flow in the ports and combustion chamber of a two-intake-value engine. The research also involves the use of the code to assess the effects of subprocesses on diesel engine performance. The accuracy of the predictions is being tested by comparisons with engine experiments. To date, comparisons were made with measured engine cylinder pressure, temperature and heat flux data, and the model results are in good agreement with the experiments. Work is in progress that will allow validation of in-cylinder flow and soot formation predictions. An engine test facility is described that is being used to provide the needed validation data. Test results were obtained showing the effect of injection rate and split injections on engine performance and emissions. Reitz, R. D. and Rutland, C. J. Unspecified Center...
Book Synopsis Modeling the Effects of Fuel Injection on Heavy-duty Diesel Engine Performance and Emissions by : David D.. Wickman
Download or read book Modeling the Effects of Fuel Injection on Heavy-duty Diesel Engine Performance and Emissions written by David D.. Wickman and published by . This book was released on 1999 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index to Wills of Charleston County, South Carolina by : Charleston, S.C. Free Library
Download or read book Index to Wills of Charleston County, South Carolina written by Charleston, S.C. Free Library and published by . This book was released on 1950 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DI Diesel Performance and Emissions Models by :
Download or read book DI Diesel Performance and Emissions Models written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis A Multi-zone Model for Prediction of DI Diesel Engine Combustion and Soot Emission by : Bi Xiaoping
Download or read book A Multi-zone Model for Prediction of DI Diesel Engine Combustion and Soot Emission written by Bi Xiaoping and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Emissions and Air Quality by : Christian Cozzarini
Download or read book Emissions and Air Quality written by Christian Cozzarini and published by SAE International. This book was released on 1999-06-09 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book evaluates the current worldwide state of knowledge about the interrelationship between emissions and air quality. This study describes the contribution of passenger car and commercial vehicle traffic to local and global emission situations, and the consequences for the environment.
Book Synopsis A Quasi-dimensional Charge Motion and Turbulence Model for Combustion and Emissions Prediction in Diesel Engines with a fully Variable Valve Train by : Qirui Yang
Download or read book A Quasi-dimensional Charge Motion and Turbulence Model for Combustion and Emissions Prediction in Diesel Engines with a fully Variable Valve Train written by Qirui Yang and published by Springer Nature. This book was released on 2021-10-01 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Qirui Yang develops a model chain for the simulation of combustion and emissions of diesel engine with fully variable valve train (VVT) based on extensive 3D-CFD simulations, and experimental measurements on the engine test bench. The focus of the work is the development of a quasi-dimensional (QDM) flow model, which sets up a series of sub-models to describe phenomenologically the swirl, squish and axial charge motions as well as the shear-related turbulence production and dissipation. The QDM flow model is coupled with a QDM combustion model and a nitrogen oxides (NOx) / soot emission model. With the established model chain, VVT operating strategies of diesel engine can be developed and optimized as part of the simulation for specific engine performance parameters and the lowest NOx and soot emissions.
Book Synopsis Modeling Multiple Injection, EGR, and Nozzle Hole Effects on D.I. Diesel Engine Emissions by : Michael Chan
Download or read book Modeling Multiple Injection, EGR, and Nozzle Hole Effects on D.I. Diesel Engine Emissions written by Michael Chan and published by . This book was released on 1997 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diesel Engine Modeling by : Society of Automotive Engineers
Download or read book Diesel Engine Modeling written by Society of Automotive Engineers and published by SAE International. This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
