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Atomization and Sprays
Импакт фактор: 1.737 5-летний Импакт фактор: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2016013860
pages 169-188

EFFECT OF ATOMIZER INTERNAL GEOMETRY ON THE INTERNAL AND EXTERNAL TWO-PHASE FLOW IN EFFERVESCENT ATOMIZATION

Mona Hassanzadeh Jobehdar
Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario, Canada
Kamran Siddiqui
Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario, Canada
Aly H. Gadallah
Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario, Canada; Department of Mechanical and Power Engineering, Tanta University, Tanta, Egypt
Wajid A. Chishty
Institute for Aerospace Research National Research Council Canada, Ottawa, Ontario, Canada

Краткое описание

An experimental study was conducted to study the internal and external two-phase flow in an effervescent atomizer using high-speed imaging. The impact of the aerator tube configuration and mixing zone length on the size of bubbles inside the mixing zone and the spray droplet characteristics at different gas-to-liquid flow rates ratios were studied. An aerator tube with the conical end base was manufactured and tested. It is observed that the separation bubble at the trailing edge is suppressed by this configuration, which resulted in more uniform and smaller bubbles compared to the standard aerator tube with a flat base. The length of the mixing zone was found to have an impact on the bubble size distribution inside the mixing zone; more uniform and smaller bubbles are generated in the shorter mixing zone. The mixing zone length, however, does not show a distinct impact on the droplet velocity and size. It is concluded that a conical base aerator tube and a shorter mixing zone could significantly improve the spray steadiness and the atomization process.


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