Download or read book Effect of Variable Fuel Composition on Emissions and Lean Blowoff Stability Performance written by Andrés Colorado and published by . This book was released on 2017 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Variable Fuel Composition on Emissions and Lean Blowoff Stability Performance written by Andrés Colorado and published by . This book was released on 2017 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Performance of a Variable Geometry Low swirl Burner Operated on Simulated Renewable Fuels in a Boiler Environment written by Nathan James Kirksey and published by . This book was released on 2014 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluates a variable blockage low-swirl injector operated on digester gas in a simulated boiler environment to understand how such a device can impact combustion performance as fuel composition varies. California, like many other states, is requiring a reduction in emissions from primary sources of electricity generation. As emission regulations become stricter, novel strategies for achieving the reductions required are required. The current energy policy in California specifically promotes the use of renewable and carbon neutral fuels such as digester gas. The future generations of burners must be fuel flexible in order to meet these emission laws while providing continual operation. To address this, a variable geometry low-swirl injector was developed and its emissions and stability performance assessed using a variety of diagnostics. It was found that a fiber optic probe, integrated into the injector head, was able to provide a reliable measure of emissions and stability. One key result from the optical probe is that the recorded radiation emitted by the reaction corresponding to the lean blow off limits of any composition of digester gas remains constant, implying it could serve as a robust stability sensor with minimal signal processing. Evaluating the role of the variable geometry found that (1) variable center blockage in a low-swirl injector has no effect on the lean blow off limits, (2) as the center blockage becomes less restrictive the NOx emissions will increase, and (3) incorporation of a quarl expansion rather than a sudden expansion increased the lean blow off limits and gave a 50% reduction in NOx emissions. Utilizing a low-swirl injector with high blockage in the central flow, high swirl number, can reduce the NOx emissions across the range of lean operating conditions.
Download or read book Effect of Fuel Composition and Exhaust Oxidation Catalyst on Performance and Emissions of a Lean burn Natural Gas Engine written by Anthony W. Newlin and published by . This book was released on 1996 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combustion Behavior Associated with Alternative Fuels in Lean Premixed High swirl Stabilized Distributed Reactions written by Amin Akbari and published by . This book was released on 2013 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lean blowoff, flashback and pollutant emission associated with lean premixed combustion of alternative fuels stabilized by high swirl are evaluated in this work. Alternative fuel compositions include blends of natural gas and hydrogen. Lean blowoff refers to events where the fuel-to-air ratio is not sufficient to sustain the reaction. Blowoff is often a dynamic process consisting of several stages. Correlations based on constant Damköhler (Da) number are able to estimate the impact of fuel composition on lean blowoff for the conditions studied. The accuracy of estimating initiation of blowoff is superior compared to estimation of subsequent stages of blowoff. Flashback refers to propagation of the reaction upstream into the premixing zone. In high swirl combustion applications, the concept of a quench criterion has been proposed for predicting flashback. For the present work, this concept only holds for some measured cases, which indicates multiple flashback modes even in high swirl combustion applications. The other major combustion challenge is pollutant emission. In this study NOx, CO, and N2O levels are experimentally measured. In addition, a chemical reaction network (CRN) was developed to study the details of emission formation. To develop a CRN, details of the reacting flow were needed. Hence, computational fluid dynamics (CFD) simulations were conducted. To validate CFD simulations, particle image velocimetry (PIV) and OH* chemiluminescence flame front imaging were applied. OH* chemiluminescence was also employed to visualize the flame structure and shape for different fuel compositions. The CRN simulations indicate that the NNH NOx formation pathway dominates the other formation pathways. Thus, conditions that enhance NNH NOx, such as an increase of hydrogen in fuel composition, and decrease of residence time, will result in more total NOx. The CRN also illustrates how the relative contribution of each NOx formation pathway to total NOx changes with adiabatic flame temperature (AFT). The NNH NOx formation pathway is dominant for AFT below 1900K; the Zeldovich mechanism is dominant for AFT above 1900K. In terms of N2O emissions measured and simulated results suggest the levels are negligible even for very low combustion temperatures.
Download or read book Gas Turbine Emissions written by Timothy C. Lieuwen and published by Cambridge University Press. This book was released on 2013-07-08 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of clean, sustainable energy systems is a preeminent issue in our time. Gas turbines will continue to be important combustion-based energy conversion devices for many decades to come, used for aircraft propulsion, ground-based power generation, and mechanical-drive applications. This book compiles the key scientific and technological knowledge associated with gas turbine emissions into a single authoritative source.
Download or read book Effect of Fuel Composition on the Operation of a Lean Burn Natural Gas Engine written by Nigel N. Clark and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fuel Effects on Operability of Aircraft Gas Turbine Combustors written by Meredith Colket and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In summarizing the results obtained in the first five years of the National Jet Fuel Combustion Program (NJFCP), this book demonstrates that there is still much to be learned about the combustion of alternative jet fuels.
Download or read book Effect of Fuel Composition on NOx Formation in Lean Premixed Prevaporized Combustion written by Scott A. Capehart and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine & Aeroengine Congress & Exhibition, Orlando, FL, Jun 2 - Jun 5, 1997.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1984 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Gas Turbine Combustion written by Arthur H. Lefebvre and published by CRC Press. This book was released on 2010-04-26 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the developments in gas turbine combustion technology that have occurred in the last decade, Gas Turbine Combustion: Alternative Fuels and Emissions, Third Edition provides an up-to-date design manual and research reference on the design, manufacture, and operation of gas turbine combustors in applications ranging from aeronautical to po
Download or read book Lean burn Characteristics of a Gasoline Engine Enriched with Hydrogen from a Plasmatron Fuel Reformer written by Edward Joseph Tully and published by . This book was released on 2002 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on 2000 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomization and Sprays written by Arthur H. Lefebvre and published by CRC Press. This book was released on 2017-03-27 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this long-time bestseller provides a framework for designing and understanding sprays for a wide array of engineering applications. The text contains correlations and design tools that can be easily understood and used in relating the design of atomizers to the resulting spray behavior. Written to be accessible to readers with a modest technical background, the emphasis is on application rather than in-depth theory. Numerous examples are provided to serve as starting points for using the information in the book. Overall, this is a thoroughly updated edition that still retains the practical focus and readability of the original work by Arthur Lefebvre.
Download or read book Turbulent Premixed Flames written by Nedunchezhian Swaminathan and published by Cambridge University Press. This book was released on 2011-04-25 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: A work on turbulent premixed combustion is important because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the potential to offer ultra-low emission levels, but they are notoriously susceptible to combustion oscillations. Thus, sophisticated control measures are inevitably required. The editors' intent is to set out the modeling aspects in the field of turbulent premixed combustion. Good progress has been made on this topic, and this cohesive volume contains contributions from international experts on various subtopics of the lean premixed flame problem.
Download or read book Fundamentals of Combustion Processes written by Sara McAllister and published by Springer Science & Business Media. This book was released on 2011-05-10 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Combustion Processes is designed as a textbook for an upper-division undergraduate and graduate level combustion course in mechanical engineering. The authors focus on the fundamental theory of combustion and provide a simplified discussion of basic combustion parameters and processes such as thermodynamics, chemical kinetics, ignition, diffusion and pre-mixed flames. The text includes exploration of applications, example exercises, suggested homework problems and videos of laboratory demonstrations
Download or read book Gas Turbine Engineering Handbook written by Meherwan P. Boyce and published by Elsevier. This book was released on 2017-09-01 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Gas Turbine Engineering Handbook has been the standard for engineers involved in the design, selection, and operation of gas turbines. This revision includes new case histories, the latest techniques, and new designs to comply with recently passed legislation. By keeping the book up to date with new, emerging topics, Boyce ensures that this book will remain the standard and most widely used book in this field. The new Third Edition of the Gas Turbine Engineering Hand Book updates the book to cover the new generation of Advanced gas Turbines. It examines the benefit and some of the major problems that have been encountered by these new turbines. The book keeps abreast of the environmental changes and the industries answer to these new regulations. A new chapter on case histories has been added to enable the engineer in the field to keep abreast of problems that are being encountered and the solutions that have resulted in solving them. Comprehensive treatment of Gas Turbines from Design to Operation and Maintenance. In depth treatment of Compressors with emphasis on surge, rotating stall, and choke; Combustors with emphasis on Dry Low NOx Combustors; and Turbines with emphasis on Metallurgy and new cooling schemes. An excellent introductory book for the student and field engineers A special maintenance section dealing with the advanced gas turbines, and special diagnostic charts have been provided that will enable the reader to troubleshoot problems he encounters in the field The third edition consists of many Case Histories of Gas Turbine problems. This should enable the field engineer to avoid some of these same generic problems
