Dynamics and Suppression Effectiveness of Monodisperse Water Droplets in Non-Premixed Counterflow Flames PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
In situ measurements of velocity and size distributions of initially monodisperse water mists of initial diameters ranging from 14 micrometers to 42 micrometers seeded into the air stream of non-premixed propane/air counterflow flames are reported. Droplets were generated piezoelectrically, and the size and velocity distributions and the number density were determined by phase-Doppler particle anemometry. Droplets having initial diameters of 18 micrometers underwent complete vaporization in a counterflow flame at a strain rate of approximately 170 s-1, while droplets of 30 micrometers penetrated slightly beyond the visible flame zone. Measurements of the effect of water droplets on the extinction strain rates of propane/air counterflow flames were performed. Droplets having initial diameters of 14 micrometers and 30 micrometers were found to have similar suppression effectiveness, while droplets of 42 micrometers were substantially less effective at reducing the extinction strain rates. Both the 14 micrometer and 30 micrometer water droplets were found to be more effective, on a mass basis, than CF3Br. The present experimental results are in excellent agreement with the predictions of recent modeling studies exploring the behavior of various sized water droplets in counterflow flame.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
In situ measurements of velocity and size distributions of initially monodisperse water mists of initial diameters ranging from 14 micrometers to 42 micrometers seeded into the air stream of non-premixed propane/air counterflow flames are reported. Droplets were generated piezoelectrically, and the size and velocity distributions and the number density were determined by phase-Doppler particle anemometry. Droplets having initial diameters of 18 micrometers underwent complete vaporization in a counterflow flame at a strain rate of approximately 170 s-1, while droplets of 30 micrometers penetrated slightly beyond the visible flame zone. Measurements of the effect of water droplets on the extinction strain rates of propane/air counterflow flames were performed. Droplets having initial diameters of 14 micrometers and 30 micrometers were found to have similar suppression effectiveness, while droplets of 42 micrometers were substantially less effective at reducing the extinction strain rates. Both the 14 micrometer and 30 micrometer water droplets were found to be more effective, on a mass basis, than CF3Br. The present experimental results are in excellent agreement with the predictions of recent modeling studies exploring the behavior of various sized water droplets in counterflow flame.
Author: Nasser Ashgriz
Publisher: Springer Science & Business Media
ISBN: 1441972641
Category : Technology & Engineering
Languages : en
Pages : 922
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Book Description
Atomization and sprays are used in a wide range of industries: mechanical, chemical, aerospace, and civil engineering; material science and metallurgy; food; pharmaceutical, forestry, environmental protection; medicine; agriculture; meteorology and others. Some specific applications are spray combustion in furnaces, gas turbines and rockets, spray drying and cooling, air conditioning, powdered metallurgy, spray painting and coating, inhalation therapy, and many others. The Handbook of Atomization and Sprays will bring together the fundamental and applied material from all fields into one comprehensive source. Subject areas included in the reference are droplets, theoretical models and numerical simulations, phase Doppler particle analysis, applications, devices and more.
Author: KoHse-HoingHaus
Publisher: Taylor & Francis US
ISBN: 9781560329381
Category : Technology & Engineering
Languages : en
Pages : 748
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Book Description
The editors have assembled a world-class group of contributors who address the questions the combustion diagnostic community faces. They are chemists who identify the species to be measured and the interfering substances that may be present; physicists, who push the limits of laser spectroscopy and laser devices and who conceive suitable measurement schemes; and engineers, who know combustion systems and processes. This book assists in providing guidance for the planning of combustion experiments, in judging research strategies and in conceiving new ideas for combustion research. It provides a snapshot of the available diagnostic methods and thier typical applications from the perspective of leading experts in the field.
Author: Combustion Institute (U.S.). Eastern States Section. Fall Technical Meeting
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 464
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Book Description
Author:
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 268
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Book Description
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 2730
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Author: National Fire Protection Association
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
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Book Description
Author: J. Warnatz
Publisher: Springer Science & Business Media
ISBN: 3662045087
Category : Science
Languages : en
Pages : 309
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Book Description
This book provides a rigorous treatment of the coupling of chemical reactions and fluid flow. Combustion-specific topics of chemistry and fluid mechanics are considered and tools described for the simulation of combustion processes. This edition is completely restructured. Mathematical Formulae and derivations as well as the space-consuming reaction mechanisms have been replaced from the text to appendix. A new chapter discusses the impact of combustion processes on the atmosphere, the chapter on auto-ignition is extended to combustion in Otto- and Diesel-engines, and the chapters on heterogeneous combustion and on soot formation are heavily revised.
Author: Zhongchao Tan
Publisher: Springer
ISBN: 9812872124
Category : Technology & Engineering
Languages : en
Pages : 499
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Book Description
This textbook discusses engineering principles relating to air pollution and greenhouse gases (GHGs); it focuses on engineering principles and designs of related devices and equipment for air emission control for a variety of industries such as energy, chemical, and transportation industries. The book aims primarily at senior undergraduate and graduate students in mechanical, chemical and/or environmental engineering departments; it can also be used as a reference book by technical staff and design engineers who are interested in and need to have technical knowledge in air pollution and GHGs. The book is motivated by recent rapid advances in air pollution and greenhouse gas emissions and their control technologies. In addition to classic topics related to air pollution, this book is also featured with emerging topics related to air pollution and GHGs. It covers recent advances in engineering approaches to the reduction of GHG emissions including, but are not limited to, green energy technologies and carbon sequestration and storage. It also introduces an emerging topic in air pollution, which is referred to as Nano Air Pollution. It is a growing concern in air pollution, but largely missing in similar books, likely because of recent rapid advances in nanotechnology has outpaced the advances in nano air pollution control.
Author: Jean-Baptiste Donnet
Publisher: Routledge
ISBN: 135146261X
Category : Science
Languages : en
Pages : 484
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Book Description
The second edition of this reference provides comprehensive examinations of developments in the processing and applications of carbon black, including the use of new analytical tools such as scanning tunnelling microscopy, Fourier transform infrared spectroscopy and inverse gas chromatography.;Completely rewritten and updated by numerous experts in the field to reflect the enormous growth of the field since the publication of the previous edition, Carbon Black: discusses the mechanism of carbon black formation based on recent advances such as the discovery of fullerenes; elucidates micro- and macrostructure morphology and other physical characteristics; outlines the fractal geometry of carbon black as a new approach to characterization; reviews the effect of carbon black on the electrical and thermal conductivity of filled polymers; delineates the applications of carbon black in elastomers, plastics, and zerographic toners; and surveys possible health consequences of exposure to carbon black.;With over 1200 literature citations, tables, and figures, this resource is intended for physical, polymer, surface and colloid chemists; chemical and plastics engineers; spectroscopists; materials scientists; occupational safety and health physicians; and upper-level undergraduate and graduate students in these disciplines.
