Physics Of Turbulent Jet Ignition
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Physics Of Turbulent Jet Ignition
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Author : Sayan Biswas
language : en
Publisher: Springer
Release Date : 2018-05-03
Physics Of Turbulent Jet Ignition written by Sayan Biswas and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-03 with Technology & Engineering categories.
This book focuses on developing strategies for ultra-lean combustion of natural gas and hydrogen, and contributes to the research on extending the lean flammability limit of hydrogen and air using a hot supersonic jet. The author addresses experimental methods, data analysis techniques, and results throughout each chapter and: Explains the fundamental mechanisms behind turbulent hot jet ignition using non-dimensional analysis Explores ignition characteristics by impinging hot jet and multiple jets in relation to better controllability and lean combustion Explores how different instability modes interact with the acoustic modes of the combustion chamber. This book provides a potential answer to some of the issues that arise from lean engine operation, such as poor ignition, engine misfire, cycle-to-cycle variability, combustion instability, reduction in efficiency, and an increase in unburned hydrocarbon emissions. This thesis was submitted to and approved by Purdue University.
Quantitative Temperature Formaldehyde Concentration Imaging For High Pressure Turbulent Fuel Jet Ignition
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Author : Joshua Michael Herzog
language : en
Publisher:
Release Date : 2020
Quantitative Temperature Formaldehyde Concentration Imaging For High Pressure Turbulent Fuel Jet Ignition written by Joshua Michael Herzog and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Understanding the process of turbulent fuel jet ignition in engines is critical to improve engine designs. Unfortunately, there is much we do not understand about the ignition process, and current diagnostic methods are insufficient to improve our understanding of the coupling between temperature, velocity, and chemistry in high-pressure turbulent jet ignition. Here, a diagnostic approach is designed that can simultaneously measure temperature, velocity, and formaldehyde concentration in a turbulent fuel jet during low-temperature ignition in an optically-accessible engine. Particle image velocimetry (PIV), aerosol phosphor thermometry (APT), and formaldehyde planar laser-induced fluorescence (PLIF) are used in combination. A detailed characterization of formaldehyde photophysics is performed using spectral simulations and experimental data. Several thermographic phosphors are characterized in detail (including physical and luminescence properties), models are developed for phosphor signal intensity and APT performance, and a method is outlined and demonstrated to combine simultaneous APT techniques to increase the temperature measurement range. The APT methods are applied to atmospheric pressure heated jets to validate the performance estimates, and identify issues in their application. A thorough analysis of design considerations for particle-based techniques is also provided, and performance estimates are made for the combined diagnostic. It was found that the Ce:LuAG phosphor with 355-nm excitation can be most easily integrated with PIV and formaldehyde PLIF measurements, and has good performance characteristics over the 700-1000 K temperature range of interest, with ~20 K estimated precision on average. Multiple scattering was found to impose a significant limitation on particle seeding density. Several phosphor materials and techniques were also found to be viable for temperature imaging well above 1000 K (Ce:GdPO4, Eu:BAM, and Ce:CSSO). Performance predictions for formaldehyde suggest that detection limits are on the order of 100 ppm throughout much of the temperature and pressure range expected during ignition, and a ratiometric background correction approach was discussed to avoid interference from phosphor luminescence, or other broadband background sources. PIV is readily integrated into the APT measurement. The proposed approach is capable of simultaneous temperature, velocity, and formaldehyde concentration imaging of low-temperature ignition processes, and provides a significant step towards improving our understanding of high-pressure turbulent jet ignition.
Alternative Fuels And Advanced Combustion Techniques As Sustainable Solutions For Internal Combustion Engines
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Author : Akhilendra Pratap Singh
language : en
Publisher: Springer Nature
Release Date : 2021-05-15
Alternative Fuels And Advanced Combustion Techniques As Sustainable Solutions For Internal Combustion Engines written by Akhilendra Pratap Singh and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-15 with Technology & Engineering categories.
This monograph covers different aspects related to utilization of alternative fuels in internal combustion (IC) engines with a focus on biodiesel, dimethyl ether, alcohols, biogas, etc. The focal point of this book is to present engine combustion, performance and emission characteristics of IC engines fueled by these alternative fuels. A section of this book also covers the potential strategies of utilization of these alternative fuels in an energy efficient manner to reduce the harmful pollutants emitted from IC engines. It presents the comparative analysis of different alternative fuels in a variety of engines to show the appropriate alternative fuel for specific types of engines. This book will prove useful for both researchers as well as energy experts and policy makers.
Advanced Turbulent Combustion Physics And Applications
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Author : N. Swaminathan
language : en
Publisher: Cambridge University Press
Release Date : 2022-01-06
Advanced Turbulent Combustion Physics And Applications written by N. Swaminathan and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-06 with Science categories.
Explore a thorough overview of the current knowledge, developments and outstanding challenges in turbulent combustion and application.
Engines And Fuels For Future Transport
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Author : Gautam Kalghatgi
language : en
Publisher: Springer Nature
Release Date : 2021-12-13
Engines And Fuels For Future Transport written by Gautam Kalghatgi and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-13 with Technology & Engineering categories.
This book focuses on clean transport and mobility essential to the modern world. It discusses internal combustion engines (ICEs) and alternatives like battery electric vehicles (BEVs) which are growing fast. Alternatives to ICEs start from a very low base and face formidable environmental, material availability, and economic challenges to unlimited and rapid growth. Hence ICEs will continue to be the main power source for transport for decades to come and have to be continuously improved to improve transport sustainability. The book highlights the need to assess proposed changes in the existing transport system on a life cycle basis. The volume includes chapters discussing the challenges faced by ICEs as well as chapters on novel fuels and fuel/ engine interactions which help in this quest to improve the efficiency of ICE and reduce exhaust pollutants. This book will be of interest to those in academia and industry alike.
Combustion Processes In Propulsion
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Author : Gabriel Roy
language : en
Publisher: Butterworth-Heinemann
Release Date : 2006
Combustion Processes In Propulsion written by Gabriel Roy and has been published by Butterworth-Heinemann this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Business & Economics categories.
Chemical propulsion comprises the science and technology of using chemical reactions of any kind to create thrust and thereby propel a vehicle or object to a desired acceleration and speed. Cumbustion Processes in Propulsion focuses on recent advances in the design of very highly efficient, low-pollution-emitting propulsion systems, as well as advances in testing, diagnostics and analysis. It offers unique coverage of Pulse Detonation Engines, which add tremendous power to jet thrust by combining high pressure with ignition of the air/fuel mixture. Readers will learn about the advances in the reduction of jet noise and toxic fuel emissions-something that is being heavily regulated by relevant government agencies. Lead editor is one of the world's foremost combustion researchers, with contributions from some of the world's leading researchers in combustion engineering Covers all major areas of chemical propulsion-from combustion measurement, analysis and simulation, to advanced control of combustion processes, to noise and emission control Includes important information on advanced technologies for reducing jet engine noise and hazardous fuel combustion emissions
Combustion In Piston Engines
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Author : A. K. Oppenheim
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Combustion In Piston Engines written by A. K. Oppenheim and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Technology & Engineering categories.
Combustion in Piston Engines presents the technique of pressure diagnostics to measure the fuel consumption in an engine cylinder and to monitor the operation of micro-electronic systems for its control. It provides a recipe for bridging the gap between the hydrocarbon-fed combustion technology of automotive powerplants of today and electro-magnetic technologies of the future. The author proposes and introduces a model for the design of a MECC (micro-electronically controlled combustion) systems to modulate combustion in engine cylinders. This system yields significant reduction in the formation of pollutants and the consumption of fuel, so that, eventually, emissions using any clean hydrocarbon fuel will be acceptable and gas mileage could be doubled.
Turbulence And Molecular Processes In Combustion
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Author : T. Takeno
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Turbulence And Molecular Processes In Combustion written by T. Takeno and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
An understanding of the intricacies in the turbulent combustion process may be a key to solving many of the current energy and environmental problems. The essential nature of turbulent combustion can be derived from the interaction between stochastic flow fluctuations and deterministic molecular processes, such as chemical reaction and transport processes. Undoubtedly, this is one of the most challenging fields of engineering science today, requiring as it does the interaction of scientists and engineers in the respective fields of chemical kinetics and fluid mechanics. The 28 papers in this volume review recent advances in these two disciplines providing new insights into the fundamental processes, addressing a great deal of recent progress. This progress ranges from descriptions of elementary chemical kinetics, to working those descriptions into combustion calculations with large numbers of elementary steps, to improved understanding of turbulent reacting flows and advances in simulations of turbulent combustion. The contributions will inspire further research on many fronts, advancing the understanding of combustion processes, as well as fostering a growing interdisciplinary cooperation.
Data Analysis For Direct Numerical Simulations Of Turbulent Combustion
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Author : Heinz Pitsch
language : en
Publisher: Springer Nature
Release Date : 2020-05-28
Data Analysis For Direct Numerical Simulations Of Turbulent Combustion written by Heinz Pitsch and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-28 with Mathematics categories.
This book presents methodologies for analysing large data sets produced by the direct numerical simulation (DNS) of turbulence and combustion. It describes the development of models that can be used to analyse large eddy simulations, and highlights both the most common techniques and newly emerging ones. The chapters, written by internationally respected experts, invite readers to consider DNS of turbulence and combustion from a formal, data-driven standpoint, rather than one led by experience and intuition. This perspective allows readers to recognise the shortcomings of existing models, with the ultimate goal of quantifying and reducing model-based uncertainty. In addition, recent advances in machine learning and statistical inferences offer new insights on the interpretation of DNS data. The book will especially benefit graduate-level students and researchers in mechanical and aerospace engineering, e.g. those with an interest in general fluid mechanics, applied mathematics, and the environmental and atmospheric sciences.
Experiments And Numerical Simulations Of Diluted Spray Turbulent Combustion
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Author : Bart Merci
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-06-20
Experiments And Numerical Simulations Of Diluted Spray Turbulent Combustion written by Bart Merci and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-06-20 with Technology & Engineering categories.
This book reflects the outcome of the 1st International Workshop on Turbulent Spray Combustion held in 2009 in Corsica (France). The focus is on reporting the progress of experimental and numerical techniques in two-phase flows, with emphasis on spray combustion. The motivation for studies in this area is that knowledge of the dominant phenomena and their interactions in such flow systems is essential for the development of predictive models and their use in combustor and gas turbine design. This necessitates the development of accurate experimental methods and numerical modelling techniques. The workshop aimed at providing an opportunity for experts and young researchers to present the state-of-the-art, discuss new developments or techniques and exchange ideas in the areas of experimentations, modelling and simulation of reactive multiphase flows. The first two papers reflect the contents of the invited lectures, given by experts in the field of turbulent spray combustion. The first concerns computational issues, while the second deals with experiments. These lectures initiated very interesting and interactive discussions among the researchers, further pursued in contributed poster presentations. Contributions 3 and 4 focus on some aspects of the impact of the interaction between fuel evaporation and combustion on spray combustion in the context of gas turbines, while the final article deals with the interaction between evaporation and turbulence.