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Properties Of Large Turbulent Hydrogen Air Diffusion Flames
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Book Synopsis Properties of Large Turbulent Hydrogen/Air Diffusion Flames by : Harold S. Pergament
Download or read book Properties of Large Turbulent Hydrogen/Air Diffusion Flames written by Harold S. Pergament and published by . This book was released on 1977 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction of IR radiation from large, turbulent H2/air diffusion flames requires a detailed analysis of flame properties, including the effects of buoyancy. This report gives the methodology employed for analyzing such flames and the results of calculations on large flames. These (and subsequent) results have been used as input to the IR radiation calculations on the C-1 stack discussed in Part 2 of this final report. The model discussed herein treats the axisymmetric turbulent mixing of coflowing streams, including nonequilibrium chemistry, employing an eddy viscosity formulation. Comparisons are made between model predictions and the nonbuoyant laboratory H2/air flame data. It is shown that centerline temperatures and species mole fractions can be predicted to good accuracy. However, the calculated rate of radial transport of energy and mass is greater than that measured in the laboratory experiments. The results of a series of parametric calculations on buoyant flames and comparisons with buoyant flame length data show that: flame properties scale with nondimensional distance for Froude numbers (Fr) greater than about 1,000,000, buoyancy significantly affects temperature decay rates downstream of the location of maximum temperature (after all the H2 has burned), and the predicted influence of Fr on buoyant flame lengths is consistent with the available data.
Book Synopsis Structure and Radiation Properties of Luminous Turbulent Acetylene/air Diffusion Flames by : J. P. Gore
Download or read book Structure and Radiation Properties of Luminous Turbulent Acetylene/air Diffusion Flames written by J. P. Gore and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Survey of Hydrogen Combustion Properties by : Isadore L. Drell
Download or read book Survey of Hydrogen Combustion Properties written by Isadore L. Drell and published by . This book was released on 1957 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This literature survey digest of hydrogen-air combustion fundamentals presents data on flame temperature, burning velocity, quenching distance, flammability limits, ignition energy, flame stability, detonation, spontaneous ignition, and explosion limits. The data are assessed, recommended values are given, and relations among various combustion properties are discussed. New material presented includes: theoretical treatment of variation in spontaneous ignition lag with temperature, pressure, and composition, based on reaction kinetics of hydrogen-air composition range for 0.01 to 100 atmospheres and initial temperatures of 0 degrees to 1400 degrees k.
Book Synopsis Theories of Turbulent Combustion in High Speed Flows by : Paul A. Libby
Download or read book Theories of Turbulent Combustion in High Speed Flows written by Paul A. Libby and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Premixed Hydrogen/Air Flames by :
Download or read book Turbulent Premixed Hydrogen/Air Flames written by and published by . This book was released on 1991 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The properties of turbulent premixed flames were investigated both theoretically and experimentally. Attention was limited to hydrogen/air mixtures burning as either turbulent jet flames or a freely propagating flames in isotropic turbulence. The research has application to a variety to premixed turbulent combustion processes: underwater metal cutting at great depth, primary combustors for high-speed airbreathing propulsion systems, afterburners, fuel/ air explosions, and spark-ignition internal combustion engines. Major findings of this phase of the investigation are as follows: (1) effects of preferential diffusion are relevent for flames at high Reynolds number, retarding and enhancing the distortion of the flame surface by turbulence for stable and unstable conditions, respectively; (2) local turbulent burning velocity, flame brush thickness and the fractal dimension of the flame surface all increase with distance from the flameholder, with larger rates of increases at larger turbulence intensities; (3) estimates of flame properties using contemporary turbulence models were only fair because these methods cannot account for effects of preferential diffusion, distance from the flameholder and finite laminar flame speeds; and (4) the stochastic simulation duplicated measured trends of flame surface properties for neutral preferential diffusion conditions (the only case considered) but underestimated effects of turbulence (particularly near the flame tip) due to the limitations of a two-dimensional simulation.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Turbulent Free Jet Hydrogen-air Diffusion Flames with Finite Chemical Reaction Rates by : J. P. Sislian
Download or read book Analysis of Turbulent Free Jet Hydrogen-air Diffusion Flames with Finite Chemical Reaction Rates written by J. P. Sislian and published by . This book was released on 1978 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Hydrogen-air Diffusion Flames and of Compressibility Effects Related to High-speed Propulsion by : Ganeshan Balakrishnan
Download or read book Studies of Hydrogen-air Diffusion Flames and of Compressibility Effects Related to High-speed Propulsion written by Ganeshan Balakrishnan and published by . This book was released on 1992 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Premixed Flames by : Nedunchezhian Swaminathan
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.
Book Synopsis Turbulent Diffusion Flame Properties Behind a Step by : M. Z. Wu
Download or read book Turbulent Diffusion Flame Properties Behind a Step written by M. Z. Wu and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of Turbulent Hydrogen/air Diffusion Flames and Turbulence Radiation Interactions by : Oghenekevwe Owin Onokpe
Download or read book Numerical Investigation of Turbulent Hydrogen/air Diffusion Flames and Turbulence Radiation Interactions written by Oghenekevwe Owin Onokpe and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis STRUCTURE AND RADIATION PROPERTIES OF TURBULENT DIFFUSION FLAMES (FLAMES). by : MICHAEL EMMANUEL KOUNALAKIS
Download or read book STRUCTURE AND RADIATION PROPERTIES OF TURBULENT DIFFUSION FLAMES (FLAMES). written by MICHAEL EMMANUEL KOUNALAKIS and published by . This book was released on 1990 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: scales. (Abstract shortened with permission of author.)
Book Synopsis THE SURFACE STRUCTURE OF TURBULENT PREMIXED HYDROGEN/AIR RIM-STABILIZED FLAMES AT HIGH REYNOLDS NUMBER (PREMIXED TURBULENT FLAMES, FLAMES). by : MING-SHIN WU
Download or read book THE SURFACE STRUCTURE OF TURBULENT PREMIXED HYDROGEN/AIR RIM-STABILIZED FLAMES AT HIGH REYNOLDS NUMBER (PREMIXED TURBULENT FLAMES, FLAMES). written by MING-SHIN WU and published by . This book was released on 1991 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: three-dimensional simulation, to remove 2-D deficiencies, appears to be computationally feasible for high Reynolds number conditions of interest for practical applications.
Book Synopsis Hydrogen for Future Thermal Engines by : Efstathios-Al. Tingas
Download or read book Hydrogen for Future Thermal Engines written by Efstathios-Al. Tingas and published by Springer Nature. This book was released on 2023-07-14 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the potential of hydrogen combustion in thermal engines and serves as a foundation for future research. Hydrogen, a well-established energy carrier, has been used in internal combustion engines for centuries, but despite progress and industry interest, hydrogen engines have yet to reach mass production. In light of recent efforts to combat climate change with clean energy and environmentally-friendly technologies, the use of hydrogen in thermal engines is gaining momentum. This book examines the unique challenges of hydrogen combustion due to its wide flammability limits, high auto-ignition temperature, and high diffusivity. It reviews current knowledge on the fundamental and practical aspects of hydrogen combustion and considers current developments and potential future advancement.
Book Synopsis An Investigation of Structure and Radiation Properties of Turbulent Buoyant Diffusion Flames by : San-Mou Jeng
Download or read book An Investigation of Structure and Radiation Properties of Turbulent Buoyant Diffusion Flames written by San-Mou Jeng and published by . This book was released on 1984 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Combustion, Flames and Explosions of Gases by : Bernard Lewis
Download or read book Combustion, Flames and Explosions of Gases written by Bernard Lewis and published by Academic Press. This book was released on 2013-10-22 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion, Flames, and Explosions of Gases, Second Edition focuses on the processes, methodologies, and reactions involved in combustion phenomena. The publication first offers information on theoretical foundations, reaction between hydrogen and oxygen, and reaction between carbon monoxide and oxygen. Discussions focus on the fundamentals of reaction kinetics, elementary and complex reactions in gases, thermal reaction, and combined hydrogen-carbon monoxide-oxygen reaction. The text then elaborates on the reaction between hydrocarbons and oxygen and combustion waves in laminar flow. The manuscript tackles combustion waves in turbulent flow and air entrainment and burning of jets of fuel gases. Topics include effect of turbulence spectrum and turbulent wrinkling on combustion wave propagation; ignition of high-velocity streams by hot solid bodies; burners with primary air entrainment; and description of jet flames. The book then takes a look at detonation waves in gases; emission spectra, ionization, and electric-field effects in flames; and methods of flame photography and pressure recording. The publication is a valuable reference for readers interested in combustion phenomena.
Book Synopsis ASME Proceedings of the 1988 National Heat Transfer Conference : HTD 96 by :
Download or read book ASME Proceedings of the 1988 National Heat Transfer Conference : HTD 96 written by and published by . This book was released on 1988 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
