Survey of Hydrogen Combustion PropertiesNational Advisory Committee for Aeronautics, 1957 - 34 Seiten 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. |
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activation energies adiabatic flame temperatures atmospheric pressure Berlad blowoff curve boundary velocity gradient burned gas burner flames carbon dioxide chain carrier Chem cm/sec composition Critical boundary velocity Cylindrical burner data of reference detonation velocity diameter Effect of pressure Elbe equation Equivalence ratio experimental explosion limits explosion-limit figure 25 flameholder flammability limits flashback flow velocity Fourth Symposium International Frank E fuel concentration Gases Hydrogen in air hydrogen-air flames hydrogen-air mixtures ignition lag increasing hydrogen concentration initial mixture temperature initial temperature lean limit lean mixtures maximum burning velocity measured millijoules millimeters of mercury minimum NACA RM E57D24 nitrogen obtained oxygen percent by volume percent hydrogen plot potassium chloride pressure dependence quenching distance reaction rate reduced pressures reference 26 references 64 Reynolds number rich limit second limit shows spark ignition energy spontaneous ignition spontaneous-ignition temperatures stoichiometric hydrogen-oxygen mixture stoichiometric mixture surface theoretical tion tube ture vessel wall Williams & Wilkins