Laminar burning velocity of propane-air mixtures at high temperature and pressure

Metghalchi, Mohamad; Keck, James C.

doi:10.1016/0010-2180(80)90046-2

Cited by 482 publications

(189 citation statements)

References 6 publications

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“…The laminar flame speed with gasoline and CNG (methane) fuels, according to Metghalchi and Keck [21] is calculated as follows:…”

Section: Mathematical Modelmentioning

confidence: 99%

Bi-fuel SI Engine Model for Analysis and Optimization

Rezapour¹,

Mason²,

Wood³

et al. 2014

ujme

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The natural gas as an alternative fuel has economical and environmental benefits. Bi-fuel engines powered by gasoline and compressed natural gas (CNG) are an intermediate and alternative step to dedicated CNG engines. The conversion to bi-fuel CNG engine could be a short-term solution to air pollution problem in many developing countries. In this paper a mathematical model of a bi-fuel four-stroke spark ignition (SI) engine is presented for comparative studies and analysis. It is based on the two-zone combustion model, and it has the ability to simulate turbulent combustion. The model is capable of predicting the cylinder temperature and pressure, heat transfer, brake work , brake thermal and volumetric efficiency, brake torque, brake specific fuel consumption (BSFC), brake mean effective pressure (BMEP), concentration of CO 2 , brake specific CO (BSCO) and brake specific NOx (BSNOx). The effect of engine speed, equivalence ratio and performance parameters using gasoline and CNG fuels are analysed. The model has been validated by experimental data using the results obtained from a bi-fuel engine. The results show the capability of the model in terms of engine performance optimization and minimization of the emissions. The engine used in this study is a typical example of a modified bi-fuel engine conversion, which could benefit the researchers in the field.

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“…The laminar flame speed with gasoline and CNG (methane) fuels, according to Metghalchi and Keck [21] is calculated as follows:…”

Section: Mathematical Modelmentioning

confidence: 99%

Bi-fuel SI Engine Model for Analysis and Optimization

Rezapour¹,

Mason²,

Wood³

et al. 2014

ujme

View full text Add to dashboard Cite

show abstract

“…Andrews and Bradley (1) , Metghalchi and Keck (2) , Iijima and Takeno (3) , and Hill et al (4) investigated the effects of the pressure on the laminar burning velocity of the spherically propagating flame. Kobayashi et al (5) studied the laminar burning velocity and the flame instabilities at elevated pressures.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pressure on Burning Velocity and Instabilities of Propane-Air Premixed Flames

Kitagawa

2005

JSME international journal. Ser. B, Fluids and thermal engineer

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Spherically propagating laminar flames at elevated pressures in a large volume bomb were studied for propane-air mixtures. The effects of the initial mixture pressure on the burning velocity and flame instabilities were investigated varying the initial pressure from 0.10 to 0.50 MPa. The Markstein number decreased with the increase in the initial pressure. The burning velocities at elevated pressures are affected not only by the change in the unstretched burning velocity but also by the variation in the Markstein number, or the variation in the sensitivity of the burning velocity to the flame stretch. The flame with a low Markstein number was unstable. Cellular flame structure developed earlier in such cases. Cellular structure accelerated the flame propagation. The burning velocity was affected by the flame instabilities in addition to the above two factors.

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“…The traditional approach [3], based on pressure variations in a windowless chamber, allows experimentation with very high initial pressures. However, without direct observation of the flame movement and hence the ability to evaluate the stretch intensity, it is fundamentally not acceptable for our purpose.…”

Section: Introductionmentioning

confidence: 99%

Morphology and burning rates of expanding spherical flames in H2/O2/inert mixtures up to 60 atmospheres

Tse

Zhu

Law

2000

Proceedings of the Combustion Institute

324

143

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Recognizing that previous experimental studies on constant-pressure, outwardly propagating, spherical flames with imaging capability were limited to pressures less than about 5 atm, and that pressures within internal combustion engines are substantially higher, a novel experimental apparatus was designed to extend the environmental pressure to 60 atm. Results substantiate previous observations of the propensity of cell formation over the flame surface due to hydrodynamic and diffusive-thermal instabilities and provide convincing evidence that wrinkled flame is the preferred mode of propagation in hydrogen/air mixtures in environments with pressures above only a few atmospheres. It is further shown that, by using helium as the diluent, and by reducing the oxygen concentration of the combustible, diffusional-thermal instability can be mostly suppressed and the hydrodynamic instability delayed. Stretch-free laminar flame speeds were subsequently determined for such smooth flames up to 20 atm and were compared with the calculated values, allowing for detailed chemistry and transport.

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Laminar burning velocity of propane-air mixtures at high temperature and pressure

Cited by 482 publications

References 6 publications

Bi-fuel SI Engine Model for Analysis and Optimization

Bi-fuel SI Engine Model for Analysis and Optimization

Effects of Pressure on Burning Velocity and Instabilities of Propane-Air Premixed Flames

Morphology and burning rates of expanding spherical flames in H2/O2/inert mixtures up to 60 atmospheres

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