Use of the constant-volume bomb technique for measuring burning velocity

Eschenbach, R.C.; Agnew, J.T.

doi:10.1016/0010-2180(58)90048-8

Cited by 33 publications

(4 citation statements)

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“…From the evolution of the radius versus time, one can extract the spatial flame speed defined as: V S = d r f l d t Eschenbach and Agnew have shown that, in the case of expanding flames the spatial flame velocity is linked to the laminar flame velocity through the following expression: S L = true( V S + r b 3 · P b d P b d t true) true( M b M u true) true( T u T b true) true( P b P u true) where S L is the laminar flame velocity, V S is the spatial flame velocity, r is the radius of the flame, M is the molecular weight, T is the temperature, P is the pressure, and the subscripts u and b represent the unburned and burned conditions, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Experimental and Chemical Kinetic Modeling Study of 3-Pentanone Oxidation

et al. 2010

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Shock tube ignition delay times have been measured for 3-pentanone at a reflected shock pressure of 1 atm (±2%), in the temperature range 1250-1850 K, at equivalence ratios of 0.5-2.0 for O(2) mixtures in argon with fuel concentrations varying from 0.875 to 1.3125%. Laminar flame speeds have also been measured at an initial pressure of 1 atm over an equivalence ratio range. Complementary to previous studies [Pichon S., Black, G., Chaumeix, N., Yahyaoui, M., Simmie, J. M., Curran, H. J., Donohue, R. Combust. Flame, 2009, 156, 494-504; Serinyel, Z.; Black, G.; Curran, H. J.; Simmie, J. M. Combustion Sci. Tech., 2010, 182, 574-587], laminar flame speeds of 2-butanone have also been measured, and relative reactivities of these ketones have been compared and discussed. A chemical kinetic submechanism describing the oxidation of 3-pentanone has been developed and detailed in this paper; rate constants for unimolecular fuel decomposition reactions have been treated for falloff in pressure with nine-parameter fits using the Troe Formulism. Both compounds treated in this work may be used as fuel tracers, thus further ignition delay time measurements have been carried out by adding 3-pentanone to n-heptane in order to test the effect of the blend on ignition delay timing. It was found that the autoignition characteristics of n-heptane remained unaffected in the presence of 15% 3-pentanone in the fuel, consistent with results obtained using acetone and 2-butanone [Pichon S., Black, G., Chaumeix, N., Yahyaoui, M., Simmie, J. M., Curran, H. J., Donohue, R. Combust. Flame, 2009, 156, 494-504; Serinyel, Z.; Black, G.; Curran, H. J.; Simmie, J. M. Combustion Sci. Tech., 2010, 182, 574-587].

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Section: Methodsmentioning

confidence: 99%

“…h i b i t e d .Eschenbach and Agnew17 have shown that, in the case of expanding flames the spatial flame velocity is linked to the laminar flame velocity through the following expression:…”

mentioning

confidence: 99%

Experimental and Chemical Kinetic Modeling Study of 3-Pentanone Oxidation

et al. 2010

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“…(6) to determine S u , which was used for R f /R W [ 25 % [113]. Eschenbach and Agnew [114] derived an equation only valid for slow burning mixtures (flame speed smaller than one tenth of sound speed) and for pressure rise \7 % of the initial pressure. O'Donovan and Rallis [47] proposed Eq.…”

Section: Equations For the Determination Of S Umentioning

confidence: 99%

The constant-volume propagating spherical flame method for laminar flame speed measurement

Faghih

Chen

2016

Science Bulletin

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“…The stretch rate k is well-defined in the case of a spherical expanding flame and is given by eq ; k = 2 V s / r f The following expression was proposed by Eschenbach and Agnew to derive the laminar flame velocity from the spatial one; S L = true( V s + r b 3 P b d P b d t true) true( M b M u true) true( T u T b true) true( P b P u true) With M , the molar mass; P and T , pressure and temperature; u, the relative to unburnt gas; b, the relative to the burnt gas; r , the flame radius; and t , the time.…”

Section: Resultsmentioning

confidence: 99%

Ethyl Tertiary Butyl Ether Ignition and Combustion Using a Shock Tube and Spherical Bomb

et al. 2008

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Ignition delay times and laminar flame speeds of Ethyl tertiary butyl ether (ETBE) were measured in both a shock tube and a spherical bomb, respectively. Ignition delay times of ETBE/O 2 /Ar mixtures were derived from OH radicals emission. Mixtures containing 0.1-0.4% of fuel were oxidized over the temperature range 1280-1750 K and for two different pressures, 0.2 and 1 MPa. The equivalence ratio was varied from 0.25 to 1.5. Furthermore, laminar flame velocities of ETBE/Air (79% N 2 + 21% O 2 ) mixtures were measured at room temperature and atmospheric pressure over an extensive range of equivalence ratios (0.5-1.5). The laminar flame speed measurements were performed in a spherical bomb using shadowgraph imaging system coupled to a high speed camera. Experimental results from both shock tube and spherical bomb were compared to those computed using a detailed chemical kinetic reaction mechanism. The mechanism used, containing 145 species and 998 reversible reactions, was validated earlier by simulating jet-stirred reactor (JSR) and on shock tube experiments on the oxidation of gasoline surrogate mixtures. The detailed chemical kinetic mechanism satisfactorily reproduces the experiments in shock tube at low pressure, but some improvements are required for relatively low temperature at high pressure. For the laminar flame velocities, the mechanism slightly overpredicts the experimental results around stoichiometric conditions. The main pathways and sensitivity analyses for ETBE oxidation under freely propagating flame and shock tube conditions were examined.

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Use of the constant-volume bomb technique for measuring burning velocity

Cited by 33 publications

References 1 publication

Experimental and Chemical Kinetic Modeling Study of 3-Pentanone Oxidation

Experimental and Chemical Kinetic Modeling Study of 3-Pentanone Oxidation

The constant-volume propagating spherical flame method for laminar flame speed measurement

Ethyl Tertiary Butyl Ether Ignition and Combustion Using a Shock Tube and Spherical Bomb

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