Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Development Validation And Application Of A Reduced N Heptane Reaction Mechanism To Diesel Engine Combustion Optimization
Download Development Validation And Application Of A Reduced N Heptane Reaction Mechanism To Diesel Engine Combustion Optimization full books in PDF, epub, and Kindle. Read online Development Validation And Application Of A Reduced N Heptane Reaction Mechanism To Diesel Engine Combustion Optimization ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Development, Validation and Application of a Reduced N-heptane Reaction Mechanism to Diesel Engine Combustion Optimization by : Amar Patel
Download or read book Development, Validation and Application of a Reduced N-heptane Reaction Mechanism to Diesel Engine Combustion Optimization written by Amar Patel and published by . This book was released on 2004 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development and Validation of a Reduced Reaction Mechanism for Biodeisel-fueled Engine Simulations by : Jessica L. Brakora
Download or read book Development and Validation of a Reduced Reaction Mechanism for Biodeisel-fueled Engine Simulations written by Jessica L. Brakora and published by . This book was released on 2007 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemical Kinetic Reaction Mechanism Study for Autoignition of N-heptane Blend with Toluene and 1,3-cycloheptadiene by : Shenghui Qin
Download or read book Chemical Kinetic Reaction Mechanism Study for Autoignition of N-heptane Blend with Toluene and 1,3-cycloheptadiene written by Shenghui Qin and published by . This book was released on 2020 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fossil fuel combustion is still a significant source of world energy consumption, and with the continuous development of society, human demand for energy is growing. The internal combustion engine is widely used for transportation, and its energy source is fuel combustion. The internal combustion engine has the advantage of high thermal efficiency, low cost, and a wide range of power. Improving combustion efficiency and reducing the emission of the internal combustion engine is considered a fundamental goal by combustion-related researchers all over the world. Three-component (n-heptane, iso-octane, and toluene) blended Toluene Reference Fuels (TRF) are widely used for modeling gasoline combustion. Since the detailed fuel surrogate mechanism is complicated, we study the chemical kinetic behavior of the blend of toluene and n-heptane to reduce the difficulty. This thesis discusses the construction of the kinetic reaction mechanisms of toluene, n-heptane, 1,3-cycloheptadiene (CHPD), and their blends. The study regarding CHPD is to compare the resonance stabilization of the allylic and benzylic structures. Macroscopically, the proposed models are then validated using ignition delay times across a wide range of experimental conditions from the literature and are compared with existing models. The validation and comparison results show that our proposed model is reasonably accurate. Then this thesis conducts the reaction pathway analysis and elaborates on the oxidation pathway of CHPD, n-heptane, and toluene. What is more, the sensitivity analysis combines the rate of production analysis to show the most sensitive and vital reactions in target fuel oxidation. Regarding the blended fuels, this study finds that CHPD boosts n-heptane oxidation while toluene inhibits the oxidation. CHPD is more active than n-heptane in competing for oxygen, while toluene acts like an inert when the temperature is lower than 850 K. At higher temperatures, more toluene oxidation pathways are available, and the benzene ring will open more easily, so toluene will not inhibit the overall reactivity. With higher initial pressures and higher equivalence ratios, negative temperature coefficient regions are more profound for all species and their blends. The ignition delay trend of a blended fuel will be close to the fuel which constitutes a significant portion of the mixture"--Author's abstract.
Book Synopsis A Computational Investigation of Diesel and Biodiesel Combustion and NOx Formation in a Light-duty Compression Ignition Engine by :
Download or read book A Computational Investigation of Diesel and Biodiesel Combustion and NOx Formation in a Light-duty Compression Ignition Engine written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Diesel and biodiesel combustion in a multi-cylinder light duty diesel engine were simulated during a closed cycle (from IVC to EVO), using a commercial computational fluid dynamics (CFD) code, CONVERGE, coupled with detailed chemical kinetics. The computational domain was constructed based on engine geometry and compression ratio measurements. A skeletal n-heptane-based diesel mechanism developed by researchers at Chalmers University of Technology and a reduced biodiesel mechanism derived and validated by Luo and co-workers were applied to model the combustion chemistry. The biodiesel mechanism contains 89 species and 364 reactions and uses methyl decanoate, methyl-9- decenoate, and n-heptane as the surrogate fuel mixture. The Kelvin-Helmholtz and Rayleigh-Taylor (KH-RT) spray breakup model for diesel and biodiesel was calibrated to account for the differences in physical properties of the fuels which result in variations in atomization and spray development characteristics. The simulations were able to capture the experimentally observed pressure and apparent heat release rate trends for both the fuels over a range of engine loads (BMEPs from 2.5 to 10 bar) and fuel injection timings (from 0° BTDC to 10° BTDC), thus validating the overall modeling approach as well as the chemical kinetic models of diesel and biodiesel surrogates. Moreover, quantitative NOx predictions for diesel combustion and qualitative NOx predictions for biodiesel combustion were obtained with the CFD simulations and the in-cylinder temperature trends were correlated to the NOx trends.
Book Synopsis Optimization Methods for the Mixture Formation and Combustion Process in Diesel Engines by : Jost Weber
Download or read book Optimization Methods for the Mixture Formation and Combustion Process in Diesel Engines written by Jost Weber and published by Cuvillier Verlag. This book was released on 2008 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low-temperature Combustion and Autoignition by : M.J. Pilling
Download or read book Low-temperature Combustion and Autoignition written by M.J. Pilling and published by Elsevier. This book was released on 1997-11-27 with total page 823 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion has played a central role in the development of our civilization which it maintains today as its predominant source of energy. The aim of this book is to provide an understanding of both fundamental and applied aspects of low-temperature combustion chemistry and autoignition. The topic is rooted in classical observational science and has grown, through an increasing understanding of the linkage of the phenomenology to coupled chemical reactions, to quite profound advances in the chemical kinetics of both complex and elementary reactions. The driving force has been both the intrinsic interest of an old and intriguing phenomenon and the centrality of its applications to our economic prosperity. The volume provides a coherent view of the subject while, at the same time, each chapter is self-contained.
Book Synopsis Annual Index/abstracts of SAE Technical Papers 2004 by :
Download or read book Annual Index/abstracts of SAE Technical Papers 2004 written by and published by . This book was released on 2005 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of N-heptane Ignition in Shock Tubes by Endwall Imaging, Speciation, and Temperature Measurements by : Andrew Michael Tulgestke
Download or read book Investigation of N-heptane Ignition in Shock Tubes by Endwall Imaging, Speciation, and Temperature Measurements written by Andrew Michael Tulgestke and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With the aim of increased energy efficiency and reduced pollutant emissions from internal combustion engines which burn petroleum and other liquid fuels, several modern alternative engine concepts, termed low-temperature combustion (LTC) engines, have recently been proposed. These engines have shown promising results with regard to increasing energy efficiency and reducing pollutant emissions, but have encountered challenges in controlling the timing of ignition and the rate of heat release. These difficulties have stemmed from an inherent reliance on the global chemical reaction rate of the fuel to determine the timing of these parameters in LTC engines. Current work to better understand the reaction rates of petroleum fuels at low temperatures is critical to the development of LTC engines. Some previous experimental work measuring the global reaction rates of petroleum fuels at low temperatures relevant to LTC engines exists in the literature. However, inconsistent or scattered results are often observed in the measured ignition delay times due to complications from impurities and non-ideal effects in the experimental reactors used. In the current work, a shock tube reactor was used to measure the rate of reaction of the primary reference fuel, \norm-heptane, at low temperatures. These measurements were largely free of the influence of particle impurities that have been found to influence the low-temperature combustion behavior of \norm-heptane. High-speed imaging and laser diagnostic measurements were performed to characterize under which conditions particle impurities were problematic, and to show when experiments were free of particle effects. Following the removal of particle impurity effects, species time-histories, ignition delay times, and temperature time-histories were measured during \norm-heptane combustion. Chemical reaction models which attempt to predict the global reaction rates for LTC fuels, often disagree with experimental measurements made at low temperatures and low pressures. These chemical models are under continuous development and require additional experimental measurements as validation targets for further improvement. The data provided here may serve as validation targets for future mechanism optimizations, and may lead to an improved ability to model LTC combustion, thereby aiding in the creation of LTC engines that are better able to control their ignition timing and heat release rate.
Book Synopsis Application of Liquid Biofuels to Internal Combustion Engines by : Soo-Young No
Download or read book Application of Liquid Biofuels to Internal Combustion Engines written by Soo-Young No and published by Springer Nature. This book was released on 2020-02-17 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the application of liquid biofuels to internal combustion (IC) engines. Biofuels are one of the most promising renewable and sustainable energy sources. Particularly, liquid biofuels obtained from biomass could become a valid alternative to the use of fossil fuels in the light of increasingly stringent environmental constraints. In this book, the discussion is limited to liquid biofuels obtained from triglycerides and lignocellulose among the many different kinds of biomass. Several liquid biofuels from triglycerides, straight vegetable oil, biodiesel produced from inedible vegetable oil, hydrotreated vegetable oil, and pyrolytic oil have been selected for discussion, as well as biofuels from lignocellulose bio-oil, alcohols such as methanol, ethanol and butanol, and biomass-to-liquids diesel. This book includes three chapters on the application of methanol, ethanol and butanol to advanced compression ignition (CI) engines such as LTC, HCCI, RCCI and DF modes. Further, the application of other higher alcohols and other drop-in fuels such as DMF, MF, MTHF, and GVL are also discussed. The book will be a valuable resource for graduate students, researchers and engine designers who are interested in the application of alcohols and other biofuels in advanced CI engines, and also useful for alternative energy planners selecting biofuels for CI engines in the future.
Book Synopsis Detailed Chemical Kinetic Reaction Mechanisms for Primary Reference Fuels for Diesel Cetane Number and Spark-Ignition Octane Number by :
Download or read book Detailed Chemical Kinetic Reaction Mechanisms for Primary Reference Fuels for Diesel Cetane Number and Spark-Ignition Octane Number written by and published by . This book was released on 2010 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time, a detailed chemical kinetic reaction mechanism is developed for primary reference fuel mixtures of n-hexadecane and 2,2,4,4,6,8,8-heptamethyl nonane for diesel cetane ratings. The mechanisms are constructed using existing rules for reaction pathways and rate expressions developed previously for the primary reference fuels for gasoline octane ratings, n-heptane and iso-octane. These reaction mechanisms are validated by comparisons between computed and experimental results for shock tube ignition and for oxidation under jet-stirred reactor conditions. The combined kinetic reaction mechanism contains the submechanisms for the primary reference fuels for diesel cetane ratings and submechanisms for the primary reference fuels for gasoline octane ratings, all in one integrated large kinetic reaction mechanism. Representative applications of this mechanism to two test problems are presented, one describing fuel/air autoignition variations with changes in fuel cetane numbers, and the other describing fuel combustion in a jet-stirred reactor environment with the fuel varying from pure 2,2,4,4,6,8,8-heptamethyl nonane (Cetane number of 15) to pure n-hexadecane (Cetane number of 100). The final reaction mechanism for the primary reference fuels for diesel fuel and gasoline is available on the web.
Book Synopsis Recent Technologies for Enhancing Performance and Reducing Emissions in Diesel Engines by : Basha, J. Sadhik
Download or read book Recent Technologies for Enhancing Performance and Reducing Emissions in Diesel Engines written by Basha, J. Sadhik and published by IGI Global. This book was released on 2020-02-21 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: In today’s global context, there has been extensive research conducted in reducing harmful emissions to conserve and protect our environment. In the automobile and power generation industries, diesel engines are being utilized due to their high level of performance and fuel economy. However, these engines are producing harmful pollutants that contribute to several global threats including greenhouse gases and ozone layer depletion. Professionals have begun developing techniques to improve the performance and reduce emissions of diesel engines, but significant research is lacking in this area. Recent Technologies for Enhancing Performance and Reducing Emissions in Diesel Engines is a pivotal reference source that provides vital research on technical and environmental enhancements to the emission and combustion characteristics of diesel engines. While highlighting topics such as biodiesel emulsions, nanoparticle additives, and mathematical modeling, this publication explores the potential additives that have been incorporated into the performance of diesel engines in order to positively affect the environment. This book is ideally designed for chemical and electrical engineers, developers, researchers, power generation professionals, mechanical practitioners, scholars, ecologists, scientists, graduate students, and academicians seeking current research on modern innovations in fuel processing and environmental pollution control.
Book Synopsis Combustion of N-heptane in a Shock Tube and in a Stirred Reactor by :
Download or read book Combustion of N-heptane in a Shock Tube and in a Stirred Reactor written by and published by . This book was released on 1995 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed chemical kinetic reaction mechanism is used to study the oxidation of n-heptane under several classes of conditions. Experimental results from ignition behind reflected shock waves and in a rapid compression machine were used to develop and validate the reaction mechanism at relatively high temperatures, while data from a continuously stirred tank reactor (cstr) were used to refine the low temperature portions of the reaction mechanism. In addition to the detailed kinetic modeling, a global or lumped kinetic mechanism was used to study the same experimental results. The lumped model was able to identify key reactions and reaction paths that were most sensitive in each experimental regime and provide important guidance for the detailed modeling effort. In each set of experiments, a region of negative temperature coefficient (NTC) was observed. Variation in pressure from 5 to 40 bars were found to change the temperature range over which the NTC region occurred. Both the lumped and detailed kinetic models reproduced the measured results in each type of experiments, including the features of the NTC region, and the specific elementary reactions and reaction paths responsible for this behavior were identified and rate expressions for these reactions were determined.
Book Synopsis Reduced Chemical Kinetic Mechanisms for Hydrocarbon Fuels by :
Download or read book Reduced Chemical Kinetic Mechanisms for Hydrocarbon Fuels written by and published by . This book was released on 2006 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several reduced chemical kinetic mechanisms for combustion of ethylene and n-heptane have been generated using CARM (Computer Aided Reduction Method), a computer program that automates the mechanism-reduction process. The method uses a set of input test problems to rank species by the error introduced by assuming they are in quasi-steady state. The reduced mechanisms have been compared to detailed chemistry calculations in simple homogeneous reactors and experiments. Reduced mechanisms for combustion of ethylene having as few as 10 species were found to give reasonable agreement with detailed chemistry over a range of stoichiometries. Much better agreement with detailed chemistry was found for ethylene ignition delay when the reduced mechanism was tuned through selection of input test problems. The performance of reduced mechanisms derived from a large detailed mechanism for n-heptane was compared to results from reduced mechanisms derived from a smaller semi-empirical mechanism. The semi-empirical mechanism was clearly advantageous as a starting point for reduction for ignition delay, but the differences were not as notable for perfectly-stirred-reactor (PSR) calculations. Reduced mechanisms with as few as 12 species gave excellent results for n-heptane/air PSR calculations but 16-25 or more species are needed to simulate n-heptane ignition delay.
Book Synopsis Proceedings of the 2006 Fall Technical Conference of the ASME Internal Combustion Engine Division by : American Society of Mechanical Engineers. Internal Combustion Engine Division. Technical Conference
Download or read book Proceedings of the 2006 Fall Technical Conference of the ASME Internal Combustion Engine Division written by American Society of Mechanical Engineers. Internal Combustion Engine Division. Technical Conference and published by . This book was released on 2007 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Verzeichnis der Eröffnungsausstellung in den neuen Räumen by :
Download or read book Verzeichnis der Eröffnungsausstellung in den neuen Räumen written by and published by . This book was released on 1927 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reduced Chemical Kinetic Mechanisms for Hydrocarbon Fuels by :
Download or read book Reduced Chemical Kinetic Mechanisms for Hydrocarbon Fuels written by and published by . This book was released on 1999 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using CARM (Computer Aided Reduction Method), a computer program that automates the mechanism reduction process, a variety of different reduced chemical kinetic mechanisms for ethylene and n-heptane have been generated. The reduced mechanisms have been compared to detailed chemistry calculations in simple homogeneous reactors and experiments. Reduced mechanisms for combustion of ethylene having as few as 10 species were found to give reasonable agreement with detailed chemistry over a range of stoichiometries and showed significant improvement over currently used global mechanisms. The performance of reduced mechanisms derived from a large detailed mechanism for n-heptane was compared to results from a reduced mechanism derived from a smaller semi-empirical mechanism. The semi-empirical mechanism was advantageous as a starting point for reduction for ignition delay but not for PSR calculations. Reduced mechanisms with as few as 12 species gave excellent results for n-heptane/air PSR calculations but 16-25 or more species are needed to simulate n-heptane ignition delay.
Book Synopsis Shock Ignition of N-Heptane with Supplemental Hydrogen by :
Download or read book Shock Ignition of N-Heptane with Supplemental Hydrogen written by and published by . This book was released on 2014 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the study was to investigate the effect of adding molecular hydrogen to a mixture of n-heptane (surrogate for diesel fuel) and air on ignition delay time at prototypic post-compression diesel engine conditions. Ignition delay time data was measured using the reflected shock wave technique at a pressure of 20 bar (representative of part load engine conditions), for three fuel equivalence ratios Ø= 0.833, 1, 1.25) over a temperature range of 700 K to 1150 K. The ignition delay time data, obtained for all heptane-hydrogen fuel combinations and fuel-air equivalence ratios, is characterized by a negative temperature coefficient region between 800 K and 1000 K. This is shown to be consistent with known intermediate temperature large hydrocarbon molecular kinetics. For prototypic diesel post-compression temperatures of less than 1000 K the addition of hydrogen to n-heptane-air, for all three equivalence ratios, resulted in an increase in the measured ignition delay time. This increase was the result of hydrogen acting as a diluent due to the relatively slow dissociation compared to heptane. Therefore, although hydrogen addition to the diesel fuel is expected to reduce soot, it will have a negative impact on the cetane number. However, the impact is expected to be very small as 20% hydrogen addition on average only increases the ignition delay time by 8%. For temperatures above 1000 K, the fast decomposition of hydrogen provides free radicals that speed up the n-heptane abstraction process that result in a reduction in ignition delay time. The ignition delay time prediction using a constant volume model with the Lund reaction mechanism [1] was satisfactory. There was a negative 50 K temperature shift in the computed ignition delay time, compared to the measured data that can be attributed to the zero velocity approximation of the constant volume model. For all three equivalence ratios the constant volume model predicted the increase in ignition delay time with hydrogen addition for temperatures below 1000 K, and the decrease for temperatures above 1000 K.
