Modeling Multi Component Fuel Evaporation Flame Propagation And Chemical Kinetics Processes For Gdi Engines
DOWNLOAD
Download Modeling Multi Component Fuel Evaporation Flame Propagation And Chemical Kinetics Processes For Gdi Engines PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Modeling Multi Component Fuel Evaporation Flame Propagation And Chemical Kinetics Processes For Gdi Engines book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Modeling Multi Component Fuel Evaporation Flame Propagation And Chemical Kinetics Processes For Gdi Engines
DOWNLOAD
Author : Shiyou Yang
language : en
Publisher:
Release Date : 2010
Modeling Multi Component Fuel Evaporation Flame Propagation And Chemical Kinetics Processes For Gdi Engines written by Shiyou Yang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Modeling Of End Gas Autoignition For Knock Prediction In Gasoline Engines
DOWNLOAD
Author : Andreas Manz
language : en
Publisher: Logos Verlag Berlin GmbH
Release Date : 2016-08-18
Modeling Of End Gas Autoignition For Knock Prediction In Gasoline Engines written by Andreas Manz and has been published by Logos Verlag Berlin GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-18 with Science categories.
Downsizing of modern gasoline engines with direct injection is a key concept for achieving future CO22 emission targets. However, high power densities and optimum efficiency are limited by an uncontrolled autoignition of the unburned air-fuel mixture, the so-called spark knock phenomena. By a combination of three-dimensional Computational Fluid Dynamics (3D-CFD) and experiments incorporating optical diagnostics, this work presents an integral approach for predicting combustion and autoignition in Spark Ignition (SI) engines. The turbulent premixed combustion and flame front propagation in 3D-CFD is modeled with the G-equation combustion model, i.e. a laminar flamelet approach, in combination with the level set method. Autoignition in the unburned gas zone is modeled with the Shell model based on reduced chemical reactions using optimized reaction rate coefficients for different octane numbers (ON) as well as engine relevant pressures, temperatures and EGR rates. The basic functionality and sensitivities of improved sub-models, e.g. laminar flame speed, are proven in simplified test cases followed by adequate engine test cases. It is shown that the G-equation combustion model performs well even on unstructured grids with polyhedral cells and coarse grid resolution. The validation of the knock model with respect to temporal and spatial knock onset is done with fiber optical spark plug measurements and statistical evaluation of individual knocking cycles with a frequency based pressure analysis. The results show a good correlation with the Shell autoignition relevant species in the simulation. The combined model approach with G-equation and Shell autoignition in an active formulation enables a realistic representation of thin flame fronts and hence the thermodynamic conditions prior to knocking by taking into account the ignition chemistry in unburned gas, temperature fluctuations and self-acceleration effects due to pre-reactions. By the modeling approach and simulation methodology presented in this work the overall predictive capability for the virtual development of future knockproof SI engines is improved.
Annual Index Abstracts Of Sae Technical Papers
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2001
Annual Index Abstracts Of Sae Technical Papers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Automobiles categories.
Oil Gas Science And Technology
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1999
Oil Gas Science And Technology written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Liquid fuels categories.
Soot Formation In Gdi Gtdi Engines
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2014
Soot Formation In Gdi Gtdi Engines written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
A semi-detailed soot model was successfully implemented in the KIVA3v2-ERC code, which features a discrete multi-component (DMC) fuel vaporization model. A spark ignition model and the G-equation turbulent flame propagation model were also implemented for modeling direct-injection spark-ignition (DISI) engines. Chemistry parallelization for the soot model was also successfully realized in this work. Chemistry parallelization and a newly developed chemistry solver (SpeedCHEM) further reduced the computational time and enabled the successful application of the final code (KIVA-DMC-detsoot-G-SC) to DISI engines with the consideration of multi-component surrogates for real gasoline fuels and 3-D full cylinder engine grids. The semi-detailed soot model considered: soot inception from a four-ring aromatic (A4), soot surface growth through acetylene (C2H2) and aromatics from single-ring to four-ring species (A1, A2, A3, A4), soot coagulation, and soot oxidation through O2 and OH. A reduced polycyclic aromatic hydrocarbon (PAH) chemistry mechanism was coupled with n-heptane, iso-octane and toluene chemistry mechanisms. The combination of the chemistry mechanisms and the soot model was then validated based on experiments in terms of ignition delay, fundamental premixed flames, SANDIA constant volume chamber spray combustion. The pyrolysis process is also a significant process for soot formation at the conditions of DISI engines. Important species for soot formation from toluene pyrolysis processes were also validated based on experiments, and then coupled with the current n-heptane/iso-octane/toluene/PAH chemistry mechanisms for application to DISI engines. The vaporization of wall films plays a significant role in soot formation and a grid-independent wall film vaporization model was formulated for predicting soot emissions near wall films Predicted in-cylinder pressure and particle size distributions (PSDs) were compared to available premixed engine experimental studies. Quantitative agreements of in-cylinder particle distributions are also obtained. The improved models were then applied to studies of soot emissions from early- and late-injection strategies in a four-valve single-cylinder gasoline DISI engine, and the trends were consistent with literature or experimental data.
Combustion Modeling For Gasoline Direct Injection Engines Using Kiva 3v
DOWNLOAD
Author : Bruno P. Vanzieleghem
language : en
Publisher:
Release Date : 2004
Combustion Modeling For Gasoline Direct Injection Engines Using Kiva 3v written by Bruno P. Vanzieleghem and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Modeling Superheated Fuel Sprays And Vaporization For Gdi Engines Using Single And Multi Component Fuel Models
DOWNLOAD
Author : André Marques Gomes
language : en
Publisher:
Release Date : 2001
Modeling Superheated Fuel Sprays And Vaporization For Gdi Engines Using Single And Multi Component Fuel Models written by André Marques Gomes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Chemical Kinetics Modelling Study Of Naturally Aspirated And Boosted Si Engine Flame Propagation And Knock
DOWNLOAD
Author : Jiayi Gu
language : en
Publisher:
Release Date : 2015
Chemical Kinetics Modelling Study Of Naturally Aspirated And Boosted Si Engine Flame Propagation And Knock written by Jiayi Gu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Modeling Multicomponent Fuel Sprays In Engines With Application To Diesel Cold Starting
DOWNLOAD
Author : Nabil S. Ayoub
language : en
Publisher:
Release Date : 1995
Modeling Multicomponent Fuel Sprays In Engines With Application To Diesel Cold Starting written by Nabil S. Ayoub and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Heating And Evaporation Of Multi Component Fuel Droplets
DOWNLOAD
Author : Mansour Al Qubeissi
language : en
Publisher: BoD – Books on Demand
Release Date : 2015-08-01
Heating And Evaporation Of Multi Component Fuel Droplets written by Mansour Al Qubeissi and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-01 with Technology & Engineering categories.
This book documents pioneering mathematical models introduced for the simulation of multi-component droplets heating and evaporation processes which are implementable into commercial CFD codes. These models, described as 'multi-dimensional quasi discrete' (MDQD) and 'discrete-component' models, were applied to automotive fuel droplets in experimentally measured internal combustion engine conditions for biodiesel, diesel, and gasoline fuels. For instance, it is shown that the suggested models lead to accurate predictions of temperatures and evaporation times in typical diesel and gasoline engine conditions. Such models have also reduced CPU time about 85% compared with cases when classical approaches are used.