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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimir: 2152-5102
ISSN En Línea: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v24.i1-3.400
pages 399-406

Disintegration of Annular Liquid Sheet with Core Air Flow − Mode Classification

Chul Jin Choi
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Science Town, Daejeon 305-701, Korea
Sang Yong Lee
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
Si Hong Song
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea

SINOPSIS

Disintegration mechanism of an annular liquid sheet with a core-gas flow has been studied experimentally. Air and water were used as the test fluids, respectively. Two nozzles with different annulus gaps were prepared to find out the effect of the liquid film thickness on the breakup mode qualitatively. The breakup modes were identified from the high-speed spark photographs. The backward illumination method was adopted for flow visualization. There exist at least three different modes of disintegration, namely, Rayleigh, bubble-breakup, and pure-pulsating modes depending on the air and water flow rates. Tentative maps representing those disintegration modes were provided with the liquid film Reynolds number and the aerodynamic Weber number taken as the dimensionless parameters.