Kinetical Study of Hydrocarbon‐Nitrous Oxide Flames

D'Olieslager, J.; Tiggelen, A. van

doi:10.1002/bscb.19640730302

Cited by 7 publications

(13 citation statements)

References 8 publications

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Section: Resultssupporting

confidence: 91%

“…On the other hand, the results reported in this study are close to those reported by D'Olieslager and van Tiggelen [44] on stoichiometric CH 4 -N 2 O mixture diluted with 40 and 50 vol% N 2 , respectively. The experiments from [44] were performed using a Bunsen burner at p 0 = 1 bar. For the mixture diluted with 40 vol% N 2 , D'Olieslager and van Tiggelen reported S u = 46.50 cm/s (S u = 47.58 cm/s in this study), while for the mixture diluted with 50 vol% N 2 , they reported S u = 30.10 cm/s (S u = 31.11 cm/s in this study).…”

Section: Resultssupporting

confidence: 91%

“…Such behavior was observed for all initial pressures and diluent compositions studied here. This is also valid when comparing these values with those obtained by D'Olieslager and van Tiggelen [44] (e.g., S u = 46.50 cm/s for stoichiometric mixture diluted with 40 vol% N 2 ).…”

Section: Calculation Methodssupporting

confidence: 82%

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Deflagration Characteristics of N2-Diluted CH4-N2O Mixtures in the Course of the Incipient Stage of Flame Propagation

2021

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In this study, experimental measurements in a spherical combustion bomb were performed in order to investigate the flame propagation in N2-diluted CH4-N2O mixtures with stoichiometric equivalence ratio, at several initial pressures (0.5–1.75 bar) and ambient initial temperatures. Methane was chosen as a test-fuel, since it is the main component of natural gas, a fuel often used as a substitute to gasoline in engines with internal combustion and industrial plants. The method approached in this study is based on a simple examination of the cubic law of pressure rise during the early (incipient) period of flame propagation. The incipient stage defined by a pressure rise equal or smaller than the initial pressure, was divided into short time intervals. The burnt mass fractions (obtained using three different Equations) and flame radii at various moments of the flame propagation in the course of the incipient stage were calculated. The cubic law coefficients and corresponding laminar burning velocities at considered time intervals were also reported.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 91%

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Deflagration Characteristics of N2-Diluted CH4-N2O Mixtures in the Course of the Incipient Stage of Flame Propagation

2021

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“…Another study [57] was conducted on stoichiometric CH 4 -N 2 O mixture diluted with 40 and 50% N 2 using a Bunsen burner. The results are given in Table 5 together with the present data referring to the same mixtures at ambient initial pressure; here, the two sets of data agree well.…”

Section: Resultsmentioning

confidence: 99%

Propagation of CH4-N2O-N2 Flames in a Closed Spherical Vessel

et al. 2021

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Flammable fuel-N2O mixtures raise safety and environmental protection issues in areas where these mixtures are used (such as: industry, research, internal combustion engines). Therefore, it is important to know their laminar combustion velocities and propagation speeds—important safety parameters for design of active protection devices against gas explosions and corresponding safety recommendations. In this paper, the laminar combustion velocities of N2-diluted CH4-N2O flames, obtained in experiments on outwardly propagating flames, at various initial pressures (within 0.5–2.0 bar) and room temperature, are reported. The experiments were made in a 0.5 L spherical cell with central ignition. The laminar combustion velocities were calculated from the constants of cubic law of flame propagation during the early stage of closed cell explosions and the expansion coefficients of unburned flammable mixtures, using the adiabatic model of the flame propagation. The expansion coefficients were determined from equilibrium calculations on flames propagating under isobaric conditions. The laminar combustion velocities were compared with data reported in the literature. Using the laminar combustion velocities and the expansion coefficients, the propagation speeds of N2-diluted CH4-N2O flames were calculated. Both laminar combustion velocities and propagation speeds decrease with the initial pressure increase.

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“…Numerous studies examined the combustion rate of various fuels with N 2 O, delivering a large body of measured and computed burning velocities at ambient initial conditions or under different operating conditions. Experimental data were obtained by using stationary flames anchored on burners, as either conical flames ,,,− or flat flames. ,− Nonstationary flames were examined in closed vessel experiments, by making synchronous records of the pressure and flame radius. ,,,,,,,,,,− …”

Section: Forced Ignitions Of N2o–h2 and N2o–hydrocarbon Mixturesmentioning

confidence: 99%

Nitrous Oxide: Oxidizer and Promoter of Hydrogen and Hydrocarbon Combustion

Razus

2022

Ind. Eng. Chem. Res.

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This Review examines the gas-phase oxidations of hydrogen and other fuels (ammonia, hydrazine, hydrocarbons) with nitrous oxide, running as self-ignitions, deflagrations, or detonations. Taking into account the main feature of nitrous oxide, i.e., its ability to decompose exothermally, this Review summarizes also the conditions determining an explosive evolution of N 2 O decomposition, and the characteristic parameters of this process, as self-ignition or after ignition by local energy sources. For fuel− nitrous oxide explosive combustion, this Review is focused on conditions where the explosive combustion takes place (flammability limits, minimum ignition energy) or it is quenched (quenching distance, Maximum Experimental Safe Gap) and on the characteristic properties of explosion development and propagation. These properties are separately examined for deflagrations and detonations. The DDT (Deflagration-to-Detonation) process is also taken into account, because it occurs in most technical applications of fuel−N 2 O combustion in enclosures. This Review is completed by a discussion of processes where nitrous oxide is promoter of fuel−oxygen or fuel−air explosive combustion.

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Kinetical Study of Hydrocarbon‐Nitrous Oxide Flames

Cited by 7 publications

References 8 publications

Deflagration Characteristics of N2-Diluted CH4-N2O Mixtures in the Course of the Incipient Stage of Flame Propagation

Deflagration Characteristics of N2-Diluted CH4-N2O Mixtures in the Course of the Incipient Stage of Flame Propagation

Propagation of CH4-N2O-N2 Flames in a Closed Spherical Vessel

Nitrous Oxide: Oxidizer and Promoter of Hydrogen and Hydrocarbon Combustion

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