Title

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

Authors

Authors

J. Lee; S. Basu;R. Kumar

Comments

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Abbreviated Journal Title

J. Environ. Eng.-ASCE

Keywords

hydraulic nozzles; PDPA; PIV; droplet distribution; shadowgraphy; LIQUID SHEET; BREAK-UP; ATOMIZATION; DROPLET; SYSTEM; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, ; Mechanical; Materials Science, Multidisciplinary; Physics, Applied

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.

Journal Title

Atomization and Sprays

Volume

Atom. Sprays

Issue/Number

8

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

697

Last Page

724

WOS Identifier

23

ISSN

1044-5110

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