Impacts of Fuel Properties on Combustor Performance, Operability and Emissions Characteristics

Corporan, Edwin; Edwards, James T.; Stouffer, Scott D.; DeWitt, Matthew J.; West, Zachary J.; Klingshirn, Christopher; Bruening, Christopher R.

doi:10.2514/6.2017-0380

Cited by 16 publications

(16 citation statements)

References 9 publications

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“…Fuel MW ratio H/C IBP [43] Density [43] ST NHC C2H4 yield [46] FP LBO [38,39] DCN [40,41,42] IDT [46] Form DOT F 1700.7 Reproduction of completed page authorized j.fuel.2019.115715…”

Section: Categorymentioning

confidence: 99%

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On estimating physical and chemical properties of hydrocarbon fuels using mid-infrared FTIR spectra and regularized linear models

Wang

Ding

Wei

et al. 2019

Fuel

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The concept of a compact, economical FTIR-based analyzer for estimating the properties of hydrocarbon fuels with small amounts of fuel is proposed. The high correlations between mid-IR FTIR absorption spectra of fuel vapor in the range 3300 to 3550 nm and 15 physical and chemical properties, such as density, initial boiling point, surface tension, kinematic viscosity, number of carbon and hydrogen per average molecule, and derived cetane number, for 64 hydrocarbon fuels are demonstrated. Lasso-regularized linear models based on linear combination of absorption cross sections at selected wavelengths are built for each of these physical and chemical properties, yielding accurate estimations.

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“…Fuel MW ratio H/C IBP [43] Density [43] ST NHC C2H4 yield [46] FP LBO [38,39] DCN [40,41,42] IDT [46] Form DOT F 1700.7 Reproduction of completed page authorized j.fuel.2019.115715…”

Section: Categorymentioning

confidence: 99%

“…Derived cetane number (DCN), net heat of combustion (NHC), two-dimensional GC (GC×GC) and all physical properties of all jet fuels were measured by the Air Force Research Laboratory (AFRL) and provided through the NJFCP. LBO data were taken from literature [38,39].…”

Section: Introductionmentioning

confidence: 99%

On estimating physical and chemical properties of hydrocarbon fuels using mid-infrared FTIR spectra and regularized linear models

Wang

Ding

Wei

et al. 2019

Fuel

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“…Because current aromatics laser diagnostics cannot yet distinguish between toluene and benzene, the measured carbon attributed to aromatics in the system was equally split between benzene and toluene. This assumption is supported by the measurements of Corporan et al [35]. Ultimately, because the amounts of both benzene and toluene are small, this constraint did not impact model development.…”

Section: Inferred Mole Fraction Measurementsmentioning

confidence: 69%

“…For many parameters, such as !, (the relative ratio between 1-butene and ethylene), appropriate assumptions can be made to reduce the total number of unknowns in the system. Due to structural similarities of the fuel, reaction rates for R4-R7 were adopted from [5], which are consistent with the n-heptane and n-dodecane rate constants employed in the JetSurF mechanism [35,36]. R1-R3 rate constant parameter Model optimization 1 The model was fit to pyrolysis measurements over a relatively small temperature range, and hence assumed Arrhenius form.…”

Section: R1mentioning

confidence: 99%

A streamlined approach to hybrid-chemistry modeling for a low cetane-number alternative jet fuel

Pinkowski

Wang

Cassady

et al. 2019

Combustion and Flame

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The development of renewable, alternative jet fuels presents an exigent challenge to the aviation community. In this work, a streamlined methodology for building computationally efficient kinetic models of real fuels from shock tube experiments is developed and applied to a low cetane-number, broad-boiling alternative jet fuel (termed C-4). A multi-wavelength laser absorption spectroscopy technique was used to determine species time-histories during the high-temperature pyrolysis of C-4, and a batch gradient descent optimization routine built a hybrid-chemistry (HyChem) kinetic model from the measured data. The model was evaluated using combustor-relevant, high-pressure ignition delay time measurements with satisfactory agreement. The present model enables predictive simulations of C-4 in practical environments, while the underlying methodology described here can be readily extended to build kinetic models for a broad range of real fuels of interest.

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“…The main focus is towards drop-in fuels which can be used without modifications of the engine or penalizations in terms of performances and safety [3]. Understanding the influence of the fuel composition on the combustion behavior offers the opportunity for more suitable blend formulations which could reduce emissions and provide more efficient combustion performance [4]. Here, validated numerical models are the key step to improve design tools.…”

Section: Introductionmentioning

confidence: 99%

Temperature measurements in confined swirling spray flames by vibrational coherent anti-stokes Raman spectroscopy

Cantu

Grohmann

Meier

et al. 2018

Experimental Thermal and Fluid Science

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A gas turbine model combustor for swirling spray flames has been operated at atmospheric pressure with n-hexane, n-dodecane and kerosene Jet A-1. Temperature measurements were performed using single-shot broadband shifted vibrational coherent anti-Stokes Raman spectroscopy (SV-CARS). Series of 1200 single-shot measurements were performed at different radial and vertical locations in the flames from which the temperature distributions were deduced. In regions with high droplet load a significant number of CARS spectra were discarded due to large signal background from laser-induced breakdown effects. Results from the flames burning different fuels were compared and revealed considerable differences in the temperature profiles. The temperature measurements are part of a comprehensive research program that aims at the design of alternative fuels for aero engines and stationary gas turbines. In addition to the experimental characterization of the spray flames, the datasets are used for the validation and improvement of computational models.

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Impacts of Fuel Properties on Combustor Performance, Operability and Emissions Characteristics

Cited by 16 publications

References 9 publications

On estimating physical and chemical properties of hydrocarbon fuels using mid-infrared FTIR spectra and regularized linear models

On estimating physical and chemical properties of hydrocarbon fuels using mid-infrared FTIR spectra and regularized linear models

A streamlined approach to hybrid-chemistry modeling for a low cetane-number alternative jet fuel

Temperature measurements in confined swirling spray flames by vibrational coherent anti-stokes Raman spectroscopy

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