Studies of Mixture Preparation in a Spark Ignition Engine Using Interferometric Laser Imaging for Droplet Sizing (ILIDS)

Skippon, Stephen; Glover, Andrew; Cooney, P. J.; Boyle, R. D.

doi:10.4271/950457

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…The forward-scattered light is collected by a receiving optics. Different setups at different offaxis angles Θ have already been investigated in the literature: at 45°in [5,7,8], 73°in [9], and 90°i n [10][11][12]. Actually, ILIDS works in a large domain of forward-scattering angles, from 30°to 90° [13].…”

Section: Introductionmentioning

confidence: 99%

Interferometric laser imaging for droplet sizing revisited: elaboration of transfer matrix models for the description of complete systems

et al. 2012

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We report the development of an interferometric laser imaging for droplet sizing (ILIDS) numerical simulator. It is based on the use of generalized Huygens-Fresnel integrals associated to transfer matrices that describe the whole imaging setup. This simulator allows easy simulation of any kind of ILIDS setup. Simulations are shown to be in good agreement with experimental results. This simulator offers important perspectives in the design, realization, and calibration of ILIDS instruments, as airborne instruments, or in situ measurements in flows.

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Section: Introductionmentioning

confidence: 99%

Interferometric laser imaging for droplet sizing revisited: elaboration of transfer matrix models for the description of complete systems

et al. 2012

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“…The no window and was present so that the fourth engine was modified to allow for optical access into window would be offset at an angle of 30°, which the combustion chamber. An optical spacer, similar would allow for the use of phase Doppler interto that used by Peters [16] and Skippon et al [17], ferometry. The large windows allowed excellent with four rectangular viewing ports was machined visualization and imaging.…”

Section: Research Enginementioning

confidence: 99%

Break-up of liquid fuel films from the surfaces of the intake port and valve in port-fuel-injected engines

Koederitz

Evers

Wilkinson

et al. 2002

International Journal of Engine Research

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The atomization of liquid fuel films from the intake port and valve surfaces was investigated. The start-up mixture preparation condition for a port-fuel-injected (PFI) engine was considered in which fuel spray from the injector forms liquid films and puddles upon impact of the cold port and valve surfaces. These fuel films are then re-atomized as a result of aerodynamic and other forces as the intake valve opens. Little information is available on this re-atomization process, which can lead to large droplets and ligaments entering the combustion chamber, resulting in poor combustion. A steady flow axisymmetric valve chamber was used in conjunction with an optically accessible research engine to study this fuel film break-up in detail. Two general atomization forces were observed: Gravitationally (or mechanically) controlled and aero-dynamically controlled. Aerodynamic forces contributed to both ligament break-up and film shear break-up. The different modes of break-up were clearly correlated to air flow separation from the valve and port surfaces. A conceptual model of fuel film break-up from valve and port surfaces is given. The modes of film break-up in the engine were quite similar to those observed in the steady flow experiments. The exception was the presence of break-up due to valve motion. The intake manifold pressure strongly affected the amount of fuel build-up in the port, which in turn affected the fuel pooling and break-up. Injector targeting was also determined to affect the accumulation and atomization of liquid fuel.

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“…Interferometric Laser Imaging for Droplet Sizing (ILIDS) technique has important application in cloud or spray characterization (Dehaeck & van Beeck, 2007;Glover, Skippon, & Boyle, 1995;Hesselbacher, Anders, & Frohn, 1991;Kawaguchi, Akasaka, & Maeda, 2002;Mounaïm-Rousselle & Pajot, 1999;Ragucci, Cavaliere, & Massoli, 1990;Skippon, Glover, & Cooney, 1995). In this technique, droplets are illuminated by a laser sheet which is both reflected and refracted by the droplets, yielding signals described as two "glare points" (van de Hulst & Wang, 1991).…”

Section: Introductionmentioning

confidence: 99%

Design of ILIDS configurations for droplet characterization

Brunel

Shen

2013

Particuology

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Studies of Mixture Preparation in a Spark Ignition Engine Using Interferometric Laser Imaging for Droplet Sizing (ILIDS)

Cited by 8 publications

References 30 publications

Interferometric laser imaging for droplet sizing revisited: elaboration of transfer matrix models for the description of complete systems

Interferometric laser imaging for droplet sizing revisited: elaboration of transfer matrix models for the description of complete systems

Break-up of liquid fuel films from the surfaces of the intake port and valve in port-fuel-injected engines

Design of ILIDS configurations for droplet characterization

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