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雾化与喷雾
影响因子: 1.737 5年影响因子: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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雾化与喷雾

DOI: 10.1615/AtomizSpr.v16.i4.10
pages 349-364

VELOCITY MEASUREMENTS BY LASER FLOW TAGGING IN THE DENSE REGION OF DIESEL SPRAYS

Stephan Wissel
Lehr- und Forschungsgebiet, Laser-Messverfahren in der Thermofluiddynamik, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen, Schinkelstraße 8, D-52062 Aachen, Germany
Gerd Grunefeld
Lehr- und Forschungsgebiet, Laser-Messverfahren in der Thermofluiddynamik (LTFD), Rheinisch-Westfalische Technische Hochschule (RWTH) Aachen, Schinkelstrasse 8, 52062 Aachen, Germany

ABSTRACT

The applicability of the laser flow tagging technique is investigated for velocity measurements in the liquid phase of diesel sprays. This is done under atmospheric and near-engine-like boundary conditions in a constant volume chamber. Measurements are conducted in the primary breakup zone of the spray, where other optical techniques like particle image velocimetry or phase Doppler anemometry cannot be applied. A phosphorescent tracer dissolved in the model fuel is excited by a short UV laser pulse. By means of an appropriate optical setup, phosphorescent tag lines are generated in the spray. Using an image-intensified charge-coupled device (CCD) camera, the displacement, and therefore the velocity, of the tagged droplets is determined.


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