Journal of Civil Aviation University of China ›› 2025, Vol. 43 ›› Issue (4): 67-73.

• Aviation Environment and Sustainable Development • Previous Articles     Next Articles

Investigation on breakup and atomization characteristics of conical liquid film of
centrifugal nozzle based on VOF-to-DPM

  

  1. a. Research Institute of Science and Technology Innovation; b. Sino-European Institute of Aviation Engineering,
    CAUC, Tianjin 300300, China 
  • Received:2023-12-20 Revised:2024-04-18 Online:2025-09-22 Published:2025-09-22

Abstract:

Studying the atomization characteristics of bio aviation kerosene is an important step to improve aero-engine
combustion efficiency and reduce pollutant emissions. In order to obtain the macroscopic field physical quantity
distribution and microscopic droplet parameters of breakup and atomization of conical liquid film of centrifugal
nozzle at the same time, a model that can capture both the gas-liquid interface and droplet particles was selected
in this paper, and on this basis, the effects of different physical property parameters of bio aviation kerosene
(density, viscosity, surface tension, etc.), fuel supply pressure difference and environmental pressure on the atomization quality of the bio aviation kerosene were studied. The results showed that density, viscosity and surface
tension affect the process of breakup and atomization of bio aviation kerosene, and the larger the density, the
larger the atomized droplets, and higher viscosity and surface tension increase the diameter of the oil mist
droplets. The increase of the fuel supply pressure difference is conducive to the development of the atomization
macroscopic space field, and the spray penetration length increases significantly with the increase of the fuel
supply pressure difference. When the fuel supply pressure difference reaches a certain value, there is no obvious
difference in the increase rate of spray penetration length. Environmental pressure has a significant effect on
spray dynamics. The increase of environmental pressure makes the droplet distribution in the atomization field
decrease, resulting in the decrease of atomization quality.

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