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Atomization and Sprays
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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v16.i5.70
pages 579-598

STRUCTURE OF HIGH-VELOCITY DENSE SPRAYS IN THE NEAR-NOZZLE REGION

Franz X. Tanner
Department of Mathematical Sciences, Michigan Technological University, Houghton, MI 49931, USA
Kathleen A. Feigl
Department of Mathematical Sciences, Michigan Technological University, Houghton, MI 49931, USA
Steve A.. Ciatti
Center for Transportation Research, Argonne National Laboratory, Argonne, Illinois 60439-4815, USA
Christopher F. Powell
Energy Systems Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
S.-K. Cheong
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439-4815, USA
J. Liu
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439-4815, USA
Jinn-Chyi Wang
Department of Food Science and Technology, Tajen University, Pingtung, Taiwan

ABSTRAKT

Optical and X-ray spray measurements may yield different results when similar quantities are measured. Computer simulations were used to reconcile such differences in the near-nozzle region for high-velocity, dense fuel sprays injected into nitrogen at various gas pressures. It was found that the near-nozzle region consists of a dense core around the spray axis, which contains the majority of the liquid mass, and its radial expansion is not very sensitive with respect to changes in the gas pressure. The remaining liquid mass forms a dilute region away from the spray center; it is responsible for the formation of the optical spray angle and hence varies with the gas pressure according to the known experimental correlations. Further, injection pressure variations of sprays into SF6 gas showed that the radial expansion of the dense core and the dilute periphery are independent of the injection pressure.


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