Fluorescence spectroscopy of kerosene vapour at high temperatures and pressures: potential for gas turbines measurements

Orain, Mikaël; Baranger, P.; Ledier, C.; Apeloig, Julien; Grisch, Frédéric

doi:10.1007/s00340-013-5756-z

Cited by 45 publications

(23 citation statements)

References 55 publications

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“…The normalized fluorescence spectrum of liquid kerosene, plotted in Figure 2.b, exhibits the same shape as the vapour spectrum one obtained in previous studies [11]. The first fluorescent band is due to the mono-aromatic molecules whereas the di-aromatics ones are responsible for the second band [11]. However, a shift of the emission spectrum of liquid kerosene to higher wavelengths is observed, probably due to the differences in energy levels between liquid and vapour phases.…”

Section: Pds Extension To Jet A-1supporting

confidence: 73%

“…The laser is a Quantel Brilliant one, the spectrometer is a HR2000+ from Ocean Optics and the intensified camera is a Princeton PIMAX II. The normalized fluorescence spectrum of liquid kerosene, plotted in Figure 2.b, exhibits the same shape as the vapour spectrum one obtained in previous studies [11]. The first fluorescent band is due to the mono-aromatic molecules whereas the di-aromatics ones are responsible for the second band [11].…”

Section: Pds Extension To Jet A-1supporting

confidence: 72%

“…The first attempt consisted in exciting in the UV (at 266 nm) because of the well-known fluorescence of the aromatics contained in kerosene vapours [11]. In order to extend these results to liquid kerosene, experiments are realized with a 10mm-side cubic quartz test cell containing liquid kerosene.…”

Section: Pds Extension To Jet A-1mentioning

confidence: 99%

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Planar droplet sizing: Application to a spray of Jet A1 kerosene

Doublet¹,

Lempereur²,

Bodoc³

et al. 2017

Proceedings ILASS–Europe 2017. 28th Conference on Liquid Atomization and Spray Systems

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Optical techniques are widely employed for their non-intrusive behavior and are applied to two-phase flow investigations. Until now, the most commonly used technique to determine the droplet size is the Phase Doppler Anemogranulometry, although it is time consuming for an overall injector characterization. An imaging technique called Planar Droplet Sizing has been used to offer an alternative and provide a spatially-resolved 2D map of the Sauter Mean Diameter (SMD). The measurement is based on the ratio between laser-induced fluorescence and scattered light intensities which are assumed to be proportional respectively to the droplet volume and droplet surface area. However, previous studies revealed that the dependence of fluorescence intensity on the droplet volume can be altered by the absorption of light in the liquid. The scattered light intensity depends on the scattering angle and intensity variations within the field of view must be avoided. The aim of this study is to make the PDS technique operational for a Jet A-1 kerosene spray. A strong absorption of liquid kerosene appears under UV excitation at 266 nm making the technique unsuitable. Under visible excitation at 532 nm, a fluorescent tracer (Pyrromethene 597) must be added to the kerosene to enhance the fluorescence signal. To prevent scattered light intensity variations within the field of view, an optimal scattering angle close to 115° is required. An image processing algorithm is proposed in order to reduce the effects of multiple scattering.

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Section: Pds Extension To Jet A-1supporting

confidence: 73%

Section: Pds Extension To Jet A-1supporting

confidence: 72%

See 1 more Smart Citation

Planar droplet sizing: Application to a spray of Jet A1 kerosene

Doublet¹,

Lempereur²,

Bodoc³

et al. 2017

Proceedings ILASS–Europe 2017. 28th Conference on Liquid Atomization and Spray Systems

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“…Therefore, kerosene fuel benefits from its broadband fluorescence emission between the 260 and 420 nm spectral domains. 49,50 This fluorescence emission that results from the excitation of aromatics (i.e., mono-and diaromatics) allows visualizing the fresh gas region of the flame. Although aromatics may be excited on a wide range of wavelengths, for a flame to visualize only the unburned gas, the excitation wavelength of kerosene must be selected carefully to avoid overlaps with the resonance of an OH radical transition located in the burned gas.…”

Section: Kerosene-plifmentioning

confidence: 99%

“…45−48 Kerosene-PLIF has the advantage of visualizing the contours of the unburned fronts of kerosene/mixtures, such as Jet A-1, which is free from the influence of local quenching located in the burned gas. 49,50 Hence, in the present work, kerosene-PLIF is applied to validate the suitable flame contours definition for the OH* chemiluminescence technique when the flame-opening phenomenon conditions are present.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Laminar Flame Speed Measurement for Kerosene Fuels: Jet A-1, Surrogate Fuel, and Its Pure Components

Modica

et al. 2018

Energy Fuels

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The present work investigated the laminar flame speed measurement of kerosene-relevant fuel, including Jet A-1 commercial kerosene, and surrogate kerosene fuel and its pure components (n-decane, n-propyl benzene, and propyl cyclohexane) using a high-pressure Bunsen flame burner. The OH* chemiluminescence technique and the kerosene-PLIF technique were used for flame contours detection in order to calculate the laminar flame speed. The experiments were first conducted for n-decane/air flame at T = 400 K, φ = 0.6−1.3, and atmospheric pressure conditions in order to validate the whole experimental system and measurement methodology. The laminar flame speed of Jet A-1/air, surrogate/air, and pure kerosene component (n-decane, n-propyl benzene, and propyl cyclohexane) was then measured under large operating conditions, including temperature T = 400−473 K, pressure P = 0.1−1.0 MPa, and equivalence ratio φ = 0.7−1.3. It was found that these three pure components of kerosene have very similar laminar flame speed. By comparing the experimental results of surrogate kerosene and Jet A-1 commercial kerosene, it was observed that the proposed surrogate kerosene, i.e., mixtures of 76.7 wt % ndecane, 13.2 wt % n-propyl benzene, and 10.1 wt % propyl cyclohexane, can appropriately reproduce the flame speed property of Jet A-1 commercial kerosene fuel. The experimental results were further compared with simulation results using a skeletal kerosene mechanism.

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