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Survey Of Hydrogen Combustion Properties
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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 Report by : United States. National Advisory Committee for Aeronautics
Download or read book Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1958 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Properties of Hydrogen (engineering Design Data) by : Robert D. McCarty
Download or read book Selected Properties of Hydrogen (engineering Design Data) written by Robert D. McCarty and published by . This book was released on 1981 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characteristics of Hydrogen Combustion in a Direct Injected Constant Volume Combustion Chamber Using Rainbow Schlieren Deflectometry by : Tanisha Latrina Booker
Download or read book Characteristics of Hydrogen Combustion in a Direct Injected Constant Volume Combustion Chamber Using Rainbow Schlieren Deflectometry written by Tanisha Latrina Booker and published by . This book was released on 2011 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nation's need for alternative fuels for Internal Combustion Engines (ICEs) has been a major concern for automotive researchers. The need for a sustainable energy system has lead researchers to consider alternative fuels such as hydrogen and thus, several studies have been conducted on this fuel since the 1930s. In particular, understanding the combustion performance of hydrogen at varying equivalence ratios, ignition timings, and volumetric percentages with other fuels is necessary to optimize engine operations. This study investigates the combustion performance of hydrogen injected into a constant volume combustion chamber (CVCC). The properties studied include flame structure, combustion duration, flame front speed, chamber pressure, and net heat transfer rate. The fuel was injected directly into the chamber containing quiescent air at atmospheric pressure. An ignition system consisting of a coil and a spark plug was used to ignite fuel/air mixtures. This study implemented an optical technique, Rainbow Schlieren Deflectometry, to visualize fuel jet penetration, turbulent fuel-air mixing, flame structure, and flame propagation. Schlieren images were analyzed by a cross-correlation technique to compute flame front speed. A dynamic pressure sensor was used to acquire instantaneous chamber pressures which were used to estimate transient chamber net heat transfer rates. First, experiments were conducted by varying the fuel supply pressure to the chamber and the overall equivalence ratio. An investigation of the fuel jet penetration showed that it takes the fuel jet 2.25 ms to reach the igniter. This result was helpful in establishing ignition times for later experiments. Results showed that fuel supply pressure does not affect fuel jet penetration. The fuel jet, however, creates turbulence in the chamber that affects combustion processes. The equivalence ratios tested were [phi] = 1.0, 0.804, and 0.318. Results showed that equivalence ratio has a significant impact on flame front speed which decreased as the equivalence ratio decreased. Next, experiments were conducted to study the effects of ignition time on combustion processes. A programmable logic controller was added to the experimental setup to control ignition time and aid in sequencing events. The ignition times tested were t = 3, 5, and 10 ms in the early ignition group, t = 20, 30, and 40 ms in the mid-ignition group, and t = 60, 80, 240, and 540 ms in the late ignition group, where t = 0 refers to the start of fuel injection. Ignition time affects the flame structure and flame propagation. Results showed that at ignition times prior to the close of the fuel injector, the initial flame front speed is high because of fuel-jet generated turbulence. After the fuel injector closes, increasing the ignition time increases the combustion duration because of dissipating fuel-jet generated turbulence. Ignition time also has significant effects on chamber pressure variations and net heat transfer rates. Next, the effect of ignition time for varying equivalence ratios was studied. Experiments were conducted at three equivalence ratios, [phi] = 0.6, 0.8, and 1.0 and four ignition times, t = 3 ms, 10 ms, tend, and tend + 50 ms. An ultra-high speed camera was incorporated into the experimental setup to acquire schlieren images at a frame rate of 50,000 Hz and exposure time of 19.8μs. Results show that equivalence ratio has minor effects on chamber pressure variations and net heat transfer rate at early ignition times and on flame structure and flame propagation at any ignition times. Ignition time has a significant effect on all combustion processes. Finally, experiments were conducted to determine the effect of hydrogen percentages by volume on methane combustion at varying ignition times. A second high pressure injector was incorporated into the experimental setup to inject the methane into the combustion chamber. Experiments were conducted at the following methane/hydrogen percentages: 23% CH4 - 77% H2, 33% CH4 - 67% H2, 43% CH4 - 57% H2, 53% CH4 - 47% H2, and 63% CH4 - 37% H2. The two ignition times were t = tend and t = tend + 50 ms. Results show that combustion duration decreases as hydrogen percentage increases for identical ignition times, and as ignition time decreases at identical hydrogen percentages. Flame front speed increases as hydrogen percentage increases. Peak chamber pressure and peak net heat transfer rate decreases for the late ignition time at fixed hydrogen percentages.
Book Synopsis Thermo-Gas Dynamics of Hydrogen Combustion and Explosion by : Boris E. Gelfand
Download or read book Thermo-Gas Dynamics of Hydrogen Combustion and Explosion written by Boris E. Gelfand and published by Springer Science & Business Media. This book was released on 2012-02-09 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential of hydrogen as an important future energy source has generated fresh interest in the study of hydrogenous gas mixtures. Indeed, both its high caloricity and reactivity are unique properties, the latter underscoring safety considerations when handling such mixtures. The present monograph is devoted to the various aspects of hydrogen combustion and explosion processes. In addition to theoretical and phenomenological considerations, this work also collates the results of many experiments from less well known sources. The text reviews the literature in this respect, thereby providing valuable information about the thermo-gas-dynamical parameters of combustion processes for selected experimental settings in a range of scientific and industrial applications.
Book Synopsis Annual Report of the National Advisory Committee for Aeronautics by : United States. National Advisory Committee for Aeronautics
Download or read book Annual Report of the National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by and published by . This book was released on 1958 with total page 1138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Drag of Various Axially Symmetric Nose Shapes of Fineness Ratio 3 for Mach Numbers from 1.24 to 7.4 by : C. H. Wilts
Download or read book Investigation of the Drag of Various Axially Symmetric Nose Shapes of Fineness Ratio 3 for Mach Numbers from 1.24 to 7.4 written by C. H. Wilts and published by . This book was released on 1958 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index of NASA Technical Publications by : United States. National Aeronautics and Space Administration
Download or read book Index of NASA Technical Publications written by United States. National Aeronautics and Space Administration and published by . This book was released on 1959 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index of NASA Technical Publications by :
Download or read book Index of NASA Technical Publications written by and published by . This book was released on 1959 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts by : Huahua Xiao
Download or read book Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts written by Huahua Xiao and published by Springer. This book was released on 2015-11-03 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis offers important new insights into and a deeper understanding of premixed flame instabilities and hydrogen safety. Further, it explains the underlying mechanisms that control the combustion processes in tubes. The author’s previous scientific accomplishments, which include a series of high-quality publications in the best journals in our field, Combustion and Flame and International Journal of Heat and Mass Transfer, are very impressive and have already made a significant contribution to combustion science.
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1975 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Paper written by and published by . This book was released on 1979 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index to NASA Technical Publications by : United States. National Aeronautics and Space Administration
Download or read book Index to NASA Technical Publications written by United States. National Aeronautics and Space Administration and published by . This book was released on 1959 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogen Combustion Characteristics in Porous Burner by : 欒晏昌
Download or read book Hydrogen Combustion Characteristics in Porous Burner written by 欒晏昌 and published by . This book was released on 2009 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Note written by and published by . This book was released on 1974 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Science and Technology. Subcommittee on Energy Research, Development, and Demonstration Publisher : ISBN 13 : Total Pages :1386 pages Book Rating :4.0/5 (18 download)
Book Synopsis Hydrogen by : United States. Congress. House. Committee on Science and Technology. Subcommittee on Energy Research, Development, and Demonstration
Download or read book Hydrogen written by United States. Congress. House. Committee on Science and Technology. Subcommittee on Energy Research, Development, and Demonstration and published by . This book was released on 1975 with total page 1386 pages. Available in PDF, EPUB and Kindle. Book excerpt: