离心式喷嘴, VOF-to-DPM, 锥形液膜, 雾化, 数值模拟

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.

centrifugal nozzle, VOF-to-DPM, conical liquid film, atomization, numerical simulation