Abstract
Abstract In this paper, the atomization characteristics of an effervescent atomizer were investigated. The velocity, Sauter Mean Diameter (SMD) and atomization cone angle of the droplets were measured using the Phase Doppler Analyzer (PDA) to discuss the effect of different design parameters. The results showed that the atomization was unstable at a small Gas-Liquid Rate (GLR) while the atomization proved gradually by increasing the GLR. The optimal atomization region was at a GLR=0.1. In the atomization process, there existed a typical velocity distribution for the swirl atomizer. The design parameters of atomizer provided a great influence on the Sauter Mean Diameter (SMD) and atomization cone angle. The experiment results showed that some droplets had negative velocities.
Highlights
The gas-assisted atomization is widely used in the atomization process of liquid fuels
The results showed that the atomization was unstable at a small Gas-Liquid Rate (GLR) while the atomization proved gradually by increasing the GLR
The design parameters of atomizer provided a great influence on the Sauter Mean Diameter (SMD) and atomization cone angle
Summary
The gas-assisted atomization is widely used in the atomization process of liquid fuels. By means of injecting gas into the liquid, the bubble flow formed in the internalmixing chamber of the atomizer and the effervescent atomization was achieved through the liquid and gas interaction. When the gas and droplets continued to interact, small droplets further broke into smaller liquid particles, and the atomization process was achieved. Three kinds of multi-hole effervescent atomizers with different configurations were investigated by Li et al [3]. The high-viscosity Newtonian liquid flow in the near-atomizer spray configuration was investigated by Buckner and Sojka [4, 5]. They investigated the bubble expansion and liquid-shattering mechanisms. Several researchers [11,12,13,14] have studied the near-atomizer structure of the spray produced by a ligament-controlled effervescent atomizer
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