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COMPARISON AND CROSS-VALIDATION OF OPTICAL TECHNIQUES IN DIFFERENT SWIRL SPRAY REGIMES

Lee, Joshua and Basu, Saptarshi and Kumar, Ranganathan (2013) COMPARISON AND CROSS-VALIDATION OF OPTICAL TECHNIQUES IN DIFFERENT SWIRL SPRAY REGIMES. In: ATOMIZATION AND SPRAYS, 23 (8). pp. 697-724.

Full text not available from this repository.
Official URL: http://dx.doi.org/10.1615/AtomizSpr.2013008110

Abstract

This paper deals with an experimental study of pressure-swirl hydraulic injector nozzles using non-intrusive optical techniques. Experiments were conducted to study atomization characteristics using two nozzles with different orifice diameters, 0.3 mm and 0.5 mm, and injection pressures, 0.3-3.5 Mpa, which correspond to Reynolds number (Re-p) = 7,000-45,000, depending on nozzle utilized. Three laser diagnostic techniques were utilized: Shadowgraph, PIV (Particle Image Velocimetry), and PDPA (Phase Doppler Particle Anemometry). Measurements made in the spray in both axial and radial directions indicate that velocity, average droplet diameter profiles, and spray dynamics are highly dependent on the nozzle characteristics and injection pressure. Limitations of these techniques in the different flow regimes, related to the primary and secondary breakups as well as coalescence, are provided. Results indicate that all three techniques provide similar results throughout the different regimes. Shadowgraph and PDPA were possible in the secondary atomization and coalescence regimes while PIV measurements could be made only at the end of secondary atomization and coalescence.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to BEGELL HOUSE INC
Keywords: hydraulic nozzles; PDPA; PIV; droplet distribution; shadowgraphy
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 04 Dec 2013 11:28
Last Modified: 04 Dec 2013 11:28
URI: http://eprints.iisc.ac.in/id/eprint/47852

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