Multicomponent fuel droplet vaporization and combustion using spectral theory for a continuous mixture

Arias‐Zugasti, Manuel; Rosner, Daniel E.

doi:10.1016/s0010-2180(03)00166-4

Cited by 59 publications

(42 citation statements)

References 8 publications

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“…A plot of versus for gasoline fuel, using values of parameters ( , , ) given in [21,27], is shown in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

“…The second limitation could be avoided if a more accurate approximation were available. Whilst these limitations exist we have no other choice but to use the distribution used in [21,27].…”

Section: Resultsmentioning

confidence: 99%

“…where 5 18, subscripts 0 and f stand for initial and final values of n, Γ α is the Gamma function, α 5.7 and β 15 are parameters that determine the shape of the distribution (they are taken to be the same as in [21]), γ is the origin of the distribution function and is set to 0, and is the normalisation constant and is calculated based on Eq. (4) of [27].…”

Section: Quasi-discrete Modelmentioning

confidence: 99%

“…The distribution function was chosen to reproduce the distillation curve for gasoline as specified in ASTM D439 [17]. Following [21], it was truncated at n-pentane and it was assumed that gasoline fuel consists only of n-alkanes with 18 5 for liquid fuels. This distribution function is shown in Fig.…”

Section: Quasi-discrete Modelmentioning

confidence: 99%

“…These quasi-components are then treated as actual components with averaged values of the carbon number n, taking into account the effect of finite thermal conductivity and species diffusivities within the liquid droplet. It was assumed that the liquid density, viscosity, heat capacity and thermal conductivity of all quasi-components are the same as those for n-dodecane, while the values of latent heat of evaporation and saturated vapour pressure take into account the effect of the number of carbon atoms as suggested in [21]. This model was applied for the analysis of heating and evaporation of Diesel fuel approximated by 21 components.…”

mentioning

confidence: 99%

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Modelling of heating and evaporation of gasoline fuel droplets: A comparative analysis of approximations

Elwardany¹,

Sazhin²,

Farooq³

2013

Fuel

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Modelling of gasoline fuel droplet heating and evaporation processes is investigated using several approximations of this fuel. These are quasi-components used in the quasi-discrete model and the approximations of these quasi-components (Surrogate I (molar fractions: 83.0% n-C 6 H 14 + 15.6% n-C 10 H 22 + 1.4% n-C 14 H 30 ) and Surrogate II (molar fractions: 83.0% n-C 7 H 16 + 15.6% n-C 11 H 24 + 1.4% n-C 15 H 32 )). Also, we have used Surrogate A (molar fractions: 56% n-C 7 H 16 + 28% iso-C 8 H 18 + 17% C 7 H 8 ) and Surrogate B (molar fractions: 63% n-C 7 H 16 + 20% iso-C 8 H 18 + 17% C 7 H 8 ), originally introduced based on the closeness of the ignition delay of surrogates to that of gasoline fuel. The predictions of droplet radii and temperatures based on three quasi-components and their approximations (Surrogates I and II) are shown to be much more accurate than the predictions using Surrogates A and B.

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“…A plot of versus for gasoline fuel, using values of parameters ( , , ) given in [21,27], is shown in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

“…The second limitation could be avoided if a more accurate approximation were available. Whilst these limitations exist we have no other choice but to use the distribution used in [21,27].…”

Section: Resultsmentioning

confidence: 99%

Section: Quasi-discrete Modelmentioning

confidence: 99%

Section: Quasi-discrete Modelmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Modelling of heating and evaporation of gasoline fuel droplets: A comparative analysis of approximations

Elwardany¹,

Sazhin²,

Farooq³

2013

Fuel

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Calculation of soret‐shifted dew points by continuous mixture thermodynamics

2005

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Soret‐modified hydrocarbon mass transport across compressed nonisothermal gases

Rosner

Arias‐Zugasti

2007

AIChE Journal

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While engineering methods employed to predict mass transport rates across carrier fluids are often limited to either ideal gas mixtures or constant density liquids, we deal here with species mass transport across nonisothermal compressed gas “films”, with special reference to hydrocarbon fuel vapor transport across nonisothermal N2 or H2O boundary layers at pressures up to ca. 300 atm, and at temperatures often above 1000 K. We show that because of the pressure sensitivity of the Soret factor (which quantifies the relative importance of mass transfer due to temperature gradients compared to that due to concentration gradients) mass transfer coefficients become far more sensitive to pressure level than would have been anticipated from the pressure sensitivity of ρD 12∞. Motivated, in part, by combustion applications, we first examine the expected pressure dependence of the binary Soret factor, αT,12 for each of the n‐alkanes (CH4 to C20H42) dilute in compressed N2 or H2O, exploiting a rational formulation for “correcting” Chapman‐Enskog‐derived Soret factors (α T,120) to higher pressures based on the Thermodynamics of Irreversible Processes (TIP) combined with a Virial Equation of State (VES). Our TIP‐VES‐predicted Soret factors are used to demonstrate the pressure sensitivity of expected “Soret‐modified” mass transfer coefficients (Sherwood numbers) for the illustrative case of C12H26(g) transport across N2(g) at temperature ratios between 0.3 (“cold”‐wall) and 2.0 (“hot”‐wall) at pressures up to 300 atm. Because of the growing importance of compact, high‐pressure systems in fields beside combustion, including supercritical fluid extraction and even distillation, our present results suggest that reliable mass transfer rate predictions in nonisothermal dense vapor systems of engineering importance will generally require systematic inclusion of non‐Fickian molecular mass transport. © 2007 American Institute of Chemical Engineers AIChE J, 2007

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Multicomponent fuel droplet vaporization and combustion using spectral theory for a continuous mixture

Cited by 59 publications

References 8 publications

Modelling of heating and evaporation of gasoline fuel droplets: A comparative analysis of approximations

Modelling of heating and evaporation of gasoline fuel droplets: A comparative analysis of approximations

Calculation of soret‐shifted dew points by continuous mixture thermodynamics

Soret‐modified hydrocarbon mass transport across compressed nonisothermal gases

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