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Atomization and Sprays
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ISSN Imprimir: 1044-5110
ISSN En Línea: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v16.i2.10
pages 127-146

EXPERIMENTAL CHARACTERIZATION OF INDUSTRIAL TWIN-FLUID ATOMIZERS

Felix Barreras
Laboratorio de Investigación en Fluidodinámica y Tecnologías de la Combustión (LIFTEC), Consejo Superior de Investigaciones Científicas (CSIC) - Universidad de Zaragoza, Zaragoza, Spain
Antonio Lozano
Laboratorio de Investigación en Fluidodinámica y Tecnologías de la Combustión (LIFTEC), Consejo Superior de Investigaciones Científicas (CSIC) - Universidad de Zaragoza, Zaragoza, Spain
Jorge Barroso
LITEC/CSIC. Maria de Luna 10, 50018 Zaragoza, Spain
Eduardo Lincheta
CECYEN, Universidad de Matanzas, Autopista a Varadero, km 3½, 44740 Matanzas, Cuba

SINOPSIS

The aim of this work is focused on the characterization of the behavior of large-capacity multihole industrial twin-fluid atomizers. Sauter mean diameter (SMD), discharge coefficient, and air-to-liquid mass flow rate ratio are the parameters that have been selected for the experimental study. Two kinds of nozzles have been tested: a commercial "Y" type and a new-concept twin-fluid nozzle with an internal swirl chamber. This new-concept nozzle, which is specifically designed to atomize crude petroleum in power plants, is made with two different pieces, which eases cleaning and maintenance tasks. The best performance has been obtained for the new-concept nozzle without Y ports in the internal part, yielding smaller droplets with a lower air mass flow rate. A nondimensional relationship between the SMD-to-air core diameter at the exit holes (Dao) versus the air Reynolds number defined with Dao has been found. This nondimensional relation reproduces very well the experimental measurements for the whole range of atomizing conditions, which includes the actual power plant operating conditions.


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