Surrogate Model Design for GtL Kerosene

Saibov, Emin; Slavinskaya, Nadezhda A.; Riedel, Uwe; Kannaiyan, Kumaran

doi:10.2514/6.2012-977

Cited by 3 publications

(9 citation statements)

References 33 publications

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“…The thermo-physical data of the kerosene to be model and main principal of the IFS construction on the basis of the physical properties calculation for can be found in [2]. Here only main characteristics of modelled GTL will be briefly presented.…”

Section: IImentioning

confidence: 99%

“…In Table 3 we show the physical properties of the modelled GTL [2]. Distillation curves and two phase diagrams are shown in Figs.…”

Section: IImentioning

confidence: 99%

“…Previously [3,4] we defined this set of criteria to be: formation enthalpy, density, C/H ratio, viscosity, sooting tendency index, critical point, distillation curve, laminar flame speeds, and ignition delays. Recently [2], the Cetane Number (CN) was introduced in the list of criteria to account the ratio of the mono-branched to multi-branched paraffines and to n-paraffins in the IFS optimisation loop.…”

Section: IImentioning

confidence: 99%

“…American Institute of Aeronautics and Astronautics Table 1. Data to determine chemical content of IFS for blend 3 [2] As candidates to IFS 6 difference iso-paraffins (three iC10H22 and three i-C11H24), 2,4,5-trimethylheptane, 2,7-dimethyloctane, 2-methylnonane, 2,3,3-trimethyloctane, 2-methyldecane, and 2,3,7-trimethyl octane have been tested. Generally all i-C10H22 and i-C11H24 have similar physical properties.…”

Section: IImentioning

confidence: 99%

“…Finally, the surrogate composition [2] of 15% of propyl-cyclohexane, 36% of n-decane, 32% of 2-methyldecane and 17% of 2,7-dimethyloctane, Tbale 2, was obtained from the approximation loop presented in Fig. 1.…”

Section: IImentioning

confidence: 99%

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Kinetic Surrogate Model for GTL Kerosene

Slavinskaya

Saibov

Riedel

et al. 2014

52nd Aerospace Sciences Meeting

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This paper present results of kinetic model formulation for synthetic Gas-To-Liquid (GTL) kerosene. The input formula of surrogate (IFS) is determined from the optimization of a set of criteria: enthalpy of formation, density, C/H ratio, viscosity, sooting tendency index, two phase diagram, distillation curve, and ignition delay and cetane number (CN). The proposed surrogate consists of 17% of 2,7-dimethyloctane, 32% of 2-methyldecane, 15% of n-propylcyclohexane and 36% of n-decane. Due to the lack of data for branched 2,7-dimethyloctane (i-C 10 H 22 ) and monoparaffin 2-methyldecane (i-C 11 H 24 ), the simplified surrogates composed of n-decane, npropylcyclohexane and iso-octane has been suggested and used as a reference model. Then the chemical kinetic models for both low-and high-temperature regimes for a i-C 10 H 22 and i-C 11 H 24 have been developed on the basis of the previously-developed kinetic model for C 1 -nC 10 oxidation. The oxidation mechanisms have been tested on experimental data from literature and on the measured ignition delay times performed in a shock tube for two isomers of i-C10 H 22 under the conditions: p 5 = 16-17 atm, T 5 = 650-1500K and  = 1. The obtained kinetic sub-models have been gradually introduced in the simplified reference model. The experimental data for ignition delay of GTL kerosene have been modeled using these simplified surrogates and results have been compared. The influence of the brunched alkanes on the combustion characteristics of the GTL kerosene has been discussed.

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Section: IImentioning

confidence: 99%

“…In Table 3 we show the physical properties of the modelled GTL [2]. Distillation curves and two phase diagrams are shown in Figs.…”

Section: IImentioning

confidence: 99%

Section: IImentioning

confidence: 99%

Section: IImentioning

confidence: 99%

Section: IImentioning

confidence: 99%

See 3 more Smart Citations

Kinetic Surrogate Model for GTL Kerosene

Slavinskaya

Saibov

Riedel

et al. 2014

52nd Aerospace Sciences Meeting

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Alternative fuels in aviation

Braun‐Unkhoff

Riedel

2014

CEAS Aeronaut J

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During the last years, the aviation sector has been looking into alternatives to kerosene from crude oil, to combat climate change by reduction of greenhouse gas (GHG) emissions and to ensure security of supply at affordable prices. The efforts are also a reaction to commitments and policy packages. Currently, a wide range of possible fuel candidates and fuel blends are discussed in the triple feedstock, process, and product. Any (synthetic) aviation fuel must be certified; hence, a profound knowledge on its properties, in particular thermophysical and chemical, is inevitable. In the present paper, an overview is given on alternative jet fuels, looking into the short-term and long-term perspective. Examples focusing on experimental and modeling work of combustion properties of existing-CtL (Coal to liquid), GtL (Gas to liquid)-and possible alternative fuels-GtL+20% 1-hexanol, GtL+50% naphthenic cut-are presented. Ignition delay times and laminar flame speeds were measured for different alternative aviation fuels over a range of temperatures, pressures, and fuel-air ratios. The data are used for the validation of a detailed chemical reaction mechanism following the concept of a surrogate. Such validated reaction models able to describe and to predict reliably important combustion properties of jet fuels are needed to further promote the development of even more sophisticated jet engines and to optimize synthetic jet fuel mixtures in practical combustors.

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About the interaction between composition and performance of alternative jet fuels

et al. 2015

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Since the last decade, the aviation sector is looking for alternatives to kerosene derived from crude oil triggered also by commitments and policy packages, such as the 'Flightpath 2050' initiative and the comprehensive alternative fuels strategy, both released by the European Commission. An aircraft need with regard to a fuel is very strict, with severe constraints to ensure a safe and reliable operation for the whole flight envelope. When synthesizing a jet fuel from scratch, two important aspects need to be addressed: First, the safety aspect-the new fuel candidate must be certified, qualifying through several well-defined cost and time expensive tests, according to the approval protocol; secondly, the environmental aspect. Alternative aviation fuels alike Jet A-1 are composed of hydrocarbons; however, amount and type of hydrocarbons (chemical family) differ considerably. The question is how the composition of the fuel will affect its suitability and performance: (i) thermophysical and thermo-chemical properties of the new components to exclude any shortcomings with respect to performance and safety issues, and (ii) the new fuel combustion characteristics, i.e. ignition, flame speed, and emission pattern (pollutants), in particular. These issues are addressed in the present study. Thus, the road will be paved for developing a generalize science based tool to investigate in an efficient way if a new fuel candidate may meet the fuel specifications.

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Surrogate Model Design for GtL Kerosene

Cited by 3 publications

References 33 publications

Kinetic Surrogate Model for GTL Kerosene

Kinetic Surrogate Model for GTL Kerosene

Alternative fuels in aviation

About the interaction between composition and performance of alternative jet fuels

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