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Author : Anthony John Marchese
Publisher :
ISBN 13 :
Total Pages : 626 pages
Book Rating : 4.:/5 (357 download)
Download or read book Single and Multicomponent Liquid Droplet Combustion written by Anthony John Marchese and published by . This book was released on 1996 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Narugopal Ghata
Publisher :
ISBN 13 : 9781321608601
Total Pages : pages
Book Rating : 4.6/5 (86 download)
Download or read book Numerical Simulation of Combustion of Single Component and Multicomponent Unsupported and Fiber-supported Droplets in Micro-gravity written by Narugopal Ghata and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed computational study of evaporation and combustion phenomena of unsupported and fiber-supported single and multi-component droplets is presented. The current study consists of a total of five parts: (a) study the effects of support fibers on the vaporization of single component n-heptane droplets, (b) study the effects of the Marangoni stress in single component n-heptane droplet combustion, (c) study the effects of support fibers in single component n-heptane droplet combustion, (d) study soot shell formation for single component n-heptane droplet, and (e) study multi-component n-heptane/n-hexadecane droplet evaporation and combustion. The volume-of-fluid (VOF) method is employed in the studies to capture the liquid-gas interface for transient two-phase multidimensional flows. The calculations also include variable thermo-physical properties of the liquid and gas phases as well as Marangoni stresses. In the first part of the study, a detailed numerical investigation of the effects of support fibers on the vaporization of a fiber-supported n-heptane droplet in reduced gravity is presented. This part of the study also investigated the effects of the thickness of fiber, ambient pressure, and ambient temperature on droplet evaporation. The computational results were validated with experimental results. In the second part of the droplet combustion study, a detailed numerical investigation of the Marangoni effects for fiber supported n-heptane droplet combustion in reduced gravity is presented. A 21-step n-heptane reaction mechanism proposed by Machrafi et al. (2009) is incorporated to model the combustion with both low and high temperature chemistry. Predicted burning rates and flame diameters have been validated with data from drop tower experiments. The present computational results agree well with the experimental results. The primary focus in the third part of the study is on the effects of support fibers on the droplet burning rates and flame structure. A 21-step n-heptane reaction mechanism consisting of 20 species proposed by Zhang et al. (2013) is employed to model the combustion chemistry. Computed burning rates and flame stand-off ratios are compared with the experimental results of Jackson and Avedisian (1993). Predicted flame structures are also validated with the experimental results of Mikami et al. (1994). The present computational results agree well with the experimental results. The results indicate that the support fibers can have significant impact on droplet burning rates and flame structures. In the fourth part of the study, a detailed numerical investigation of unsupported and fiber supported n-heptane droplet combustion in reduced gravity is done to explore some important information i.e., the location of pyrolysis and soot shell using a complex multidimensional computational fluid dynamic (CFD) analysis with a detailed reaction mechanism. A 25-step n-heptane mechanism consisting of 21 species is incorporated to model the combustion. The reaction mechanism is validated for the ignition delay time. Computed burning rates and flame stand-off ratios for both unsupported and fiber-supported droplets have been validated with prior computational and experimental studies. The computed soot shell stand-off ratios are validated by comparisons with experimental and computational results. The present computational results agree well with the experimental results.In the fifth and final part, a numerical study of vaporization and combustion of unsupported and fiber-supported multi-component n-heptane/n-hexadecane droplet is presented.
Author : Nasim-ul-Hassan Malik
Publisher :
ISBN 13 :
Total Pages : 580 pages
Book Rating : 4.:/5 (13 download)
Download or read book Combustion of Single Droplets of Multicomponent Fuels written by Nasim-ul-Hassan Malik and published by . This book was released on 1986 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kannan Vittilapuram Subramanian
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (772 download)
Download or read book Modeling Combustion of Multicomponent Fuel Droplets written by Kannan Vittilapuram Subramanian and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The quasi-steady, spherically symmetric combustion of multicomponent isolated fuel droplets has been modeled using modified Shvab-Zeldovich variable mechanism. Newly developed modified Shvab-Zeldovich equations have been used to describe the gas phase reactions. Vapor-liquid equilibrium model has been applied to describe the phase change at the droplet surface. Constant gas phase specific heats are assumed. The liquid phase is assumed to be of uniform composition and temperature. Radiative heat transfer between the droplet and surroundings is neglected. The results of evaporation of gasoline with discrete composition of hydrocarbons have been presented. The evaporation rates seem to follow the pattern of volatility differentials. The evaporation rate constant was obtained as 0.344mm2/sec which compared well with the unsteady results of Reitz et al. The total evaporation time of the droplet at an ambience of 1000K was estimated to be around 0.63 seconds. Next, the results of evaporation of representative diesel fuels have been compared with previously reported experimental data. The previous experiments showed sufficient liquid phase diffusional resistance in the droplet. Numerical results are consistent with the qualitative behavior of the experiments. The quantitative deviation during the vaporization process can be attributed to the diffusion time inside the droplet which is unaccounted for in the model. Transient evaporation results have also been presented for the representative diesel droplets. The droplet temperature profile indicates that the droplet temperature does not reach an instantaneous steady state as in the case of single-component evaporation. To perform similar combustion calculations for multicomponent fuel droplets, no simple model existed prior to this work. Accordingly, a new simplified approximate mechanism for multicomponent combustion of fuel droplets has been developed and validated against several independent data sets. The new mechanism is simple enough to be used for computational studies of multicomponent droplets. The new modified Shvab-Zeldovich mechanism for multicomponent droplet combustion has been used to model the combustion characteristics of a binary alcohol-alkane droplet and validated against experimental data. Burn rate for the binary droplet of octanol-undecane was estimated to be 1.17mm2/sec in good concurrence with the experimental value of 0.952mm2/sec obtained by Law and Law. The model has then been used to evaluate the combustion characteristics of diesel fuels assuming only gas phase reactions. Flame sheet approximation has been invoked in the formulation of the model.
Author : V. I. Naoumov
Publisher : Cambridge University Press
ISBN 13 : 1108427049
Total Pages : 449 pages
Book Rating : 4.1/5 (84 download)
Download or read book Chemical Kinetics in Combustion and Reactive Flows: Modeling Tools and Applications written by V. I. Naoumov and published by Cambridge University Press. This book was released on 2019-08-22 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduces advanced mathematical tools for the modeling, simulation, and analysis of chemical non-equilibrium phenomena in combustion and flows, following a detailed explanation of the basics of thermodynamics and chemical kinetics of reactive mixtures. Researchers, practitioners, lecturers, and graduate students will find this work valuable.
Author : Alan Williams
Publisher : Butterworth-Heinemann
ISBN 13 : 1483101584
Total Pages : 300 pages
Book Rating : 4.4/5 (831 download)
Download or read book Combustion of Liquid Fuel Sprays written by Alan Williams and published by Butterworth-Heinemann. This book was released on 2013-10-22 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion of Liquid Fuel Sprays outlines the fundamentals of the combustion of sprays in a unified way which may be applied to any technological application. The book begins with a discussion of the general nature of spray combustion, the sources of liquid fuels used in spray combustion, biomass sources of liquid fuels, and the nature and properties of fuel oils. Subsequent chapters focus on the properties of sprays, the atomization of liquid fuels, and the theoretical modeling of the behavior of a spray flame in a combustion chamber. The nature and control of pollutants from spray combustion, the formation of deposits in oil-fired systems, and the combustion of sprays in furnaces and engines are elucidated as well. The text is intended for students undertaking courses or research in fuel, combustion, and energy studies.
Author : Israel Aharon
Publisher :
ISBN 13 :
Total Pages : 1186 pages
Book Rating : 4.:/5 (55 download)
Download or read book Theoretical and Experimental Studies on Evaporation and Combustion of Multicomponent Droplets in Reduced Gravity written by Israel Aharon and published by . This book was released on 1996 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Saptarshi Basu
Publisher : Springer
ISBN 13 : 9811074496
Total Pages : 433 pages
Book Rating : 4.8/5 (11 download)
Download or read book Droplets and Sprays written by Saptarshi Basu and published by Springer. This book was released on 2017-12-11 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on droplets and sprays relevant to combustion and propulsion applications. The book includes fundamental studies on the heating, evaporation and combustion of individual droplets and basic mechanisms of spray formation. The contents also extend to the latest analytical, numerical and experimental techniques for investigating the behavior of sprays in devices like combustion engines and gas turbines. In addition, the book explores several emerging areas like interactions between sprays and flames and the dynamic characteristics of spray combustion systems on the fundamental side, as well as the development of novel fuel injectors for specific devices on the application side. Given its breadth of coverage, the book will benefit researchers and professionals alike.
Author : Shah Shahood Alam
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659335266
Total Pages : 192 pages
Book Rating : 4.3/5 (352 download)
Download or read book Analysis of Droplet Combustion - A Theoretical Approach written by Shah Shahood Alam and published by LAP Lambert Academic Publishing. This book was released on 2015-03-23 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The findings of this work provides an insight into the fundamental aspects of liquid droplet combustion modelling by developing different droplet sub models. An unsteady, spherically symmetric, sub critical, single component gas phase model is developed first and tested for various ambient conditions of temperature, pressure, composition and fuels.It is further extended to include the effects of convection, droplet heating and emissions.A high pressure droplet vaporization model is evolved in view of the supercritical vaporization occuring in diesel engines and liquid rockets.Also, simple and detailed multi component droplet vaporization/combustion models are developed, since commercial fuels used in engines are multi component fuels.The discrete droplet sub models are simple and realistic requiring less computation time and therefore feasible for their implementation in spray combustion codes where CPU economy is vital.
Author : Albert Lee
Publisher :
ISBN 13 :
Total Pages : 576 pages
Book Rating : 4.:/5 (42 download)
Download or read book Droplet Combustion and Gasification Mechanisms of Multicomponent and Reactive Materials written by Albert Lee and published by . This book was released on 1990 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. B. Jordan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (599 download)
Download or read book The Combustion of Multi-component Liquid Fuel Droplets written by J. B. Jordan and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Guang Wu
Publisher :
ISBN 13 :
Total Pages : 188 pages
Book Rating : 4.:/5 (918 download)
Download or read book Numerical Study on Vaporization and Burning of Multi-component Stationary Fuel Droplets and Single-component Convective Fuel Droplets Both with Complex Configuration and Variable Properties written by Guang Wu and published by . This book was released on 2010 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. A. Sirignano
Publisher : Cambridge University Press
ISBN 13 : 0521884896
Total Pages : 481 pages
Book Rating : 4.5/5 (218 download)
Download or read book Fluid Dynamics and Transport of Droplets and Sprays written by W. A. Sirignano and published by Cambridge University Press. This book was released on 2010-01-11 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the theoretical foundations of spray and droplet applications relevant to the technology for active control of sprays applied to new products and applications, improved product performance, cost reductions, and improved environmental outcomes. It also covers theory related to power and propulsion; materials processing and manufacturing technologies including droplet-based net form processing, coating, and painting; medication; pesticides and insecticides; and other consumer uses.
Author : Forman A. Williams
Publisher : CRC Press
ISBN 13 : 0429973683
Total Pages : 549 pages
Book Rating : 4.4/5 (299 download)
Download or read book Combustion Theory written by Forman A. Williams and published by CRC Press. This book was released on 2018-03-05 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion Theory delves deeper into the science of combustion than most other texts and gives insight into combustions from a molecular and a continuum point of view. The book presents derivations of the basic equations of combustion theory and contains appendices on the background of subjects of thermodynamics, chemical kinetics, fluid dynamics, and transport processes. Diffusion flames, reactions in flows with negligible transport and the theory of pre-mixed flames are treated, as are detonation phenomena, the combustion of solid propellents, and ignition, extinction, and flamibility pehnomena.
Author : Russell A. Ogle
Publisher : Butterworth-Heinemann
ISBN 13 : 0128038292
Total Pages : 687 pages
Book Rating : 4.1/5 (28 download)
Download or read book Dust Explosion Dynamics written by Russell A. Ogle and published by Butterworth-Heinemann. This book was released on 2016-09-10 with total page 687 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dust Explosion Dynamics focuses on the combustion science that governs the behavior of the three primary hazards of combustible dust: dust explosions, flash fires, and smoldering. It explores the use of fundamental principles to evaluate the magnitude of combustible dust hazards in a variety of settings. Models are developed to describe dust combustion phenomena using the principles of thermodynamics, transport phenomena, and chemical kinetics. Simple, tractable models are described first and compared with experimental data, followed by more sophisticated models to help with future challenges. Dr. Ogle introduces the reader to just enough combustion science so that they may read, interpret, and use the scientific literature published on combustible dusts. This introductory text is intended to be a practical guide to the application of combustible dust models, suitable for both students and experienced engineers. It will help you to describe the dynamics of explosions and fires involving dust and evaluate their consequences which in turn will help you prevent damage to property, injury and loss of life from combustible dust accidents. Demonstrates how the fundamental principles of combustion science can be applied to understand the ignition, propagation, and extinction of dust explosions Explores fundamental concepts through model-building and comparisons with empirical data Provides detailed examples to give a thorough insight into the hazards of combustible dust as well as an introduction to relevant scientific literature
Author : S. K. Aggarwal
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Multicomponent and Single-component Fuel Droplet Evaporation Under High Pressure Conditions written by S. K. Aggarwal and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Elizabeth Katherine Flatbush
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (33 download)
Download or read book Computer Simulation of the Burning of a Multicomponent Droplet written by Elizabeth Katherine Flatbush and published by . This book was released on 1987 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
