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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.2020031921
pages 55-73

EFFECT OF INTERNAL GEOMETRY OF THE PRESSURE-SWIRL DUPLEX NOZZLE ON THE ATOMIZATION CHARACTERISTICS OF JET A-1 FUEL

Reza Alidoost Dafsari
Department of Mechanical System Engineering, Graduate School, Chonbuk National University, 54896, Republic of Korea
Rakhul Chandrahasan
Department of Mechanical System Engineering, Graduate School, Chonbuk National University, 54896, Republic of Korea
Chulju Ahn
Aerospace R&D Center, 13488, Republic of Korea
Jeekeun Lee
Department of Mechanical System Engineering, Graduate School, Chonbuk National University, 54896, Republic of Korea

SINOPSIS

The objective of this study was to investigate the effects of the geometric parameters of a pressure-swirl duplex nozzle (dual orifice) on the spray characteristics of Jet A-1 fuel. Two pilot nozzles with different shapes and two main nozzles with different shapes were tested. The spray characteristics were analyzed by employing laser diagnostic techniques, namely a phase Doppler particle analyzer (PDPA) and planer laser sheet imaging. Atomizer performance including flowrate, discharge coefficient, spray structure, resulting droplet size, and velocity distribution were analyzed. The results compared the atomization characteristics under various injection conditions and nozzle geometry that showed considerable major alteration in spray characteristics. This type of atomizers is mainly used as fuel injectors in gas turbine combustors. Hence, the results could be of interest to the combustion society, although this research is entirely cold flow.

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