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Atomization and Sprays
Facteur d'impact: 1.737 Facteur d'impact sur 5 ans: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2017024777
pages 859-874

EFFECT OF SWIRL CHAMBER LENGTH ON THE ATOMIZATION CHARACTERISTICS OF A PRESSURE-SWIRL NOZZLE

Reza Alidoost Dafsari
Department of Mechanical System Engineering, Graduate School, Chonbuk National University, Jeonju, Jeollabuk-do 561-756, Republic of Korea
Foad Vashahi
Department of Mechanical System Engineering, Graduate School, Chonbuk National University, Jeonju, Jeollabuk-do 561-756, Republic of Korea
Jeekeun Lee
Department of Mechanical System Engineering, Graduate School, Chonbuk National University, 54896, Republic of Korea

RÉSUMÉ

An investigation on characteristics of spray generated by a pressure-swirl atomizer with adjustable swirl chamber length was performed. Spray characteristics were studied within the range of (0.12 < length/diameter < 0.5) using water as the working fluid. Droplet Sauter mean diameter and velocity components were measured using a phase-Doppler particle analyzer device. The spray cone angle was measured from image processing of images captured by a set of Nd-YAG lasers and a high-speed camera. It was found that the swirl chamber length/diameter ratio significantly affects the spray characteristics such as droplet size distribution and mean diameter and also velocity profile. The spray pattern for the smallest ratio was observed as a hollow-cone type and then was changed to a solid-cone type by increasing the investigated parameter. The effective ratio of the swirl chamber was found to be in the range of (0.12 < length/diameter < 0.30), where all the dramatic changes occur.


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