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Atomization and Sprays
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ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2014010767
pages 827-840

SPRAY OF POWER-LAW FLUID FROM A SWIRL INJECTOR WITH NONTANGENTIAL INLET CHANNELS

Qing-fei Fu
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China; School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, United Kingdom
Kun-Da Cui
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing, China, 100191

RÉSUMÉ

The spray formation of power-law non-Newtonian liquids from swirl injectors with nontangential inlet channels was described by carrying out experiments in a spray test facility and compared with the spray behavior from common swirl injectors. The most evident difference between the two types of injectors is that the spray cone pulsated for the swirl injectors with nontangential inlets. The pulsation is caused by the compressible air remaining in the swirl chamber, which can reduce the sheet breakup length under high pressure drop. The nontangential entry of liquids into the swirl chamber eventually reduces the fluid swirl radius, and the equivalent geometric characteristics constant decreases. As a result, the spray angle would decrease, and the mass flow rate would increase.


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