Laminar burning velocities in stoichiometric hydrogen and hydrogenhydrocarbon gas mixtures

Milton, B. E.; Keck, James C.

doi:10.1016/0010-2180(84)90074-9

Cited by 217 publications

(87 citation statements)

References 9 publications

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“…It must, however, also be emphasized that although the amount of hydrogen addition is small on the basis of stoichiometry, it is quite significant in terms of the volumetric fraction. A direct comparison of our measured flame speeds with those of Milton and Keck [1] is not possible because our data were obtained at overall off-stoichiometric conditions while theirs were determined at stoichiometric concentrations. However, by using the linear relation of Eq.…”

Section: Cr~ + Ch/ ( Ch/ C A)~t Rh--cf + [Ca -Ch/(ch/ca)s] "mentioning

confidence: 99%

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Laminar flame speeds of hydrocarbon + air mixtures with hydrogen addition

Law

1986

Combustion and Flame

499

174

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Using the symmetrical, adiabatic, counterflow arrangement, the laminar flame speeds of methane + air and propane + air mixtures, with and without the addition of stoichiometrically small amounts of hydrogen, have been determined by first measuring the flame speeds with stretch and then linearly extrapolating these values to zero stretch. The results show that the flame speed is substantially increased with hydrogen addition, and that it can be linearly correlated with the flame speed without hydrogen addition and a single parameter indicating the extent of hydrogen addition.

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Section: Cr~ + Ch/ ( Ch/ C A)~t Rh--cf + [Ca -Ch/(ch/ca)s] "mentioning

confidence: 99%

“…Recently Milton and Keck [1] reported laminar flame speeds of hydrocarbon + hydrogen + air mixtures, as functions of the mixture temperature and pressure, by using the constant volume bomb technique. Because of the multiparameter nature of the investigation, the data reported are limited to stoichiometric concentrations.…”

Section: Introductionmentioning

confidence: 99%

Laminar flame speeds of hydrocarbon + air mixtures with hydrogen addition

Law

1986

Combustion and Flame

499

174

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“…High purity gases (CH 4 : 99.9995%, H 2 : 99.999%, dry air: 99.999%, N 2 : 99.9995%) are used to prepare the mixtures, relying on the partial pressures method [2]: the amount of each gas is metered by a solenoid valve, controlled by a high-resolution (100 MHz) counter/timer board installed in the main computer. The pressure is monitored by a high-accuracy pressure transmitter (0-30 bar, accuracy ±0.08% FS).…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Time-resolved, shadowgraph images of the spherical expanding flame allow to evaluate the laminar burning parameters, according to a well-known approach [2,5,[7][8][9][10]12,15,16]. The time evolution of r u (the flame radius on the unburned gas side) is obtained through frame-by-frame processing, assuming the luminous front in the shadowgraph corresponds to the radius on the unburned gas side [16].…”

Section: Theorymentioning

confidence: 99%

“…engines and gas turbine combustors is the knowledge of laminar combustion properties: they offer the basis for modelling and simulation of flame-turbulence interaction. Data on the combustion properties of pure gaseous fuels are widely available in the literature [1][2][3][4][5][6][7][8][9][10][11][12], but hardly in a systematic form; moreover, data for multi-component fuels at high pressure are even scarcer: filling this gap is the scope of the Device for Hydrogen-Air Reaction Mode Analysis (DHARMA) project, aiming at generating a comprehensive and coherent grid of data on the combustion properties of CH 4 and H 2 , obtained in conditions as close as possible to those of actual engines.…”

Section: Introductionmentioning

confidence: 99%

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Burning Behaviour of High-Pressure CH4-H2-Air Mixtures

Moccia

D'Alessio

2013

Energies

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Experimental characterization of the burning behavior of gaseous mixtures has been carried out, analyzing spherical expanding flames. Tests were performed in the Device for Hydrogen-Air Reaction Mode Analysis (DHARMA) laboratory of Istituto Motori-CNR. Based on a high-pressure, constant-volume bomb, the activity is aimed at populating a systematic database on the burning properties of CH 4 , H 2 and other species of interest, in conditions typical of internal combustion (i.c.) engines and gas turbines. High-speed shadowgraph is used to record the flame growth, allowing to infer the laminar burning parameters and the flame stability properties. Mixtures of CH 4 , H 2 and air have been analyzed at initial temperature 293÷305 K, initial pressure 3÷18 bar and equivalence ratio  = 1.0. The amount of H 2 in the mixture was 0%, 20% and 30% (vol.). The effect of the initial pressure and of the Hydrogen content on the laminar burning velocity and the Markstein length has been evaluated: the relative weight and mutual interaction has been assessed of the two controlling parameters. Analysis has been carried out of the flame instability, expressed in terms of the critical radius for the onset of cellularity, as a function of the operating conditions.

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Fundamental Combustion Modes

Matthews

2014

Encyclopedia of Automotive Engineering

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This chapter provides essential background information regarding the combustion processes in spark ignition engines, diesel engines, and engines that are under development worldwide employing various forms of low temperature combustion [e.g., homogeneous charge compression ignition (HCCI), controlled autoignition (CAI), premixed charge compression ignition (PCCI)]. These three types of engines are characterized by three different dominant modes of combustion: premixed flames, diffusion flames, and volumetric energy release. These three modes of combustion are covered in sufficient detail so that the reader should have the background knowledge that allows understanding of the combustion processes in the chapters that discuss these types of engines in depth.

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Laminar burning velocities in stoichiometric hydrogen and hydrogenhydrocarbon gas mixtures

Cited by 217 publications

References 9 publications

Laminar flame speeds of hydrocarbon + air mixtures with hydrogen addition

Laminar flame speeds of hydrocarbon + air mixtures with hydrogen addition

Burning Behaviour of High-Pressure CH4-H2-Air Mixtures

Fundamental Combustion Modes

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