Single Shot SLIPI LIF/Mie Ratio for Droplet Sizing in DISI-Sprays
Kögl, Matthias; Mishra, Yogeshwar Nath; Storch, Michael; Kristensson, Elias, et al. (2016-09-04). Single Shot SLIPI LIF/Mie Ratio for Droplet Sizing in DISI-Sprays ILASS – Europe 2016, 27th Annual Conference on Liquid Atomization and Spray Systems, 4-7 September 2016
Conference Proceeding/Paper
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Published
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English
Authors:
Kögl, Matthias
;
Mishra, Yogeshwar Nath
;
Storch, Michael
;
Kristensson, Elias
, et al.
Department:
Combustion Physics
Abstract:
This paper reports on the first realization of two-phase SLIPI (Structured Laser Illumination Planar Imaging) in combination with LIF/Mie ratio imaging for a single shot mapping of relative SMD (Sauter Mean Diameter) in a transient fuel spray. The technique is applied to a non-combusting multi-jet DISI (direct-injection spark-ignition) spray of ethanol fuel injected into an optically accessible constant volume chamber. The organic dye Eosin is added to the fuel as a laser-induced fluorescence (LIF) tracer when illuminated by the 532nm laser sheet. It is found that SLIPI produces more reliable relative SMD distributions in comparison to the conventional LIF/Mie-approach. Multiple scattered light is suppressed by the SLIPI technique and the background spray plumes and artifacts behind the illuminated plane are successfully suppressed. The single-shot SLIPI images give a clear insight into the highly turbulent liquid spray structure and provide reliable information on the spatial droplet distribution.
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