Effects of bubbles in the liquid jet on the air-blast atomization

Wu, Zhao-Wei; Shi, Z.B.; Zhao, Hui; Yao, Feng; Li, Weifeng; Xu, Jianliang

doi:10.1016/j.fuel.2020.117117

Cited by 12 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 1 shows the fields involved in cavitation bubbles within droplets. During the fuel atomization [3][4][5][6], fuel droplets in internal combustion engines could be atomized into fine droplets by cavitation. Due to the decrease in the pressure inside the droplet, which is less than the local saturated pressure, a bubble could be formed inside the droplet.…”

Section: Introductionmentioning

confidence: 99%

A Review of the Dynamics Progress of Bubble Collapse within Droplet and Droplet Splash

Zhang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

The dynamics of a cavitation bubble within a droplet is one of the hot research topics at present. The present paper summarizes the research progress of bubble collapse within droplets and associated droplet splash. Firstly, three typical structures of bubble collapse are introduced, together with the collapsing shock waves and the distribution of collapsing forces. Secondly, several typical forms of droplet splash are shown in terms of splash speed, splash direction, and dynamic mechanisms. Finally, the unsolved problems in the field of cavitation bubbles within droplets are proposed with perspectives.

show abstract

Section: Introductionmentioning

confidence: 99%

A Review of the Dynamics Progress of Bubble Collapse within Droplet and Droplet Splash

Zhang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Zhou et al studied the influence of flow field distribution inside the jet device on the mixing and dispersion performance of multi-stream fluids by optimizing the jet device of the jet flotation machine [19]. Wu et al studied the air-blast atomization with bubbles in the liquid jet by using a high-speed camera and a Malvern laser particle size analyzer, and obtained the influence rule of working parameters on bubble particle size distribution [20].…”

Section: Introductionmentioning

confidence: 99%

Study on Dispersion and Mixing Mechanism of Coal Slime Particles in Jet Mixing Flow Field

Zhou

Wang

et al. 2022

Minerals

View full text Add to dashboard Cite

The jet flow field is characterized by the dispersion and mixing of multiphase flow, which is widely used in the field of coal slime flotation. In this paper, the behavior of coal slime surface modification, the behavior of material suspension and the effect of different jet fluids on coal slurry blending were studied. Based on the action mechanism of the jet flow field, a jet device suitable for coal slime graded mixing was proposed, and the mixing effect of the jet device was tested. The results show that the jet flow field has strong effects on material dissociation and dispersion, and the mixing effect of a single jet is equivalent to that of the laser particle size analyzer’s own agitation device after stirring for 2.5 min at 500 r/min speed. The SEM test of material surface morphology and the changes of Al and Si elements measured by EDS show that the jet flow field can effectively remove the fine mud wrapped on the surface of coal particles. The precondition of material suspension is to have the just-suspended capacity. The critical jet velocity of coal slime suspension is in the range of 6 m/s~9 m/s. The mixing ability of the jet stream has certain limitations. The increase or decrease of the jet height will cause the decrease of the suspension percentage of sampling points in the tank. The gas jet mode can promote the reagent acting on the surface of the bubble liquid film to form oil bubbles, which is more suitable for hydrophobic mineral flotation. The optimal speed of the gas jet is 0.86 m/s, and the shortest cycle period is 1.0 T (T is one material cycle period). The flotation perfection index of 0.5–0.25 mm and less than 0.075 mm coal slime increased by 2.67% and 26.78%, respectively, indicating that the overall idea of the jet mixing device proposed based on the experimental conclusion is feasible.

show abstract

“…Gas–liquid jet flow, one of the most common multiphase flow phenomena, 1,2 has gained considerable attention in recent years owing to its widespread applications in chemical and physical processes such as fuel combustion, 3 jet pumps, 4 air-blast atomization, 5 blow spinning, 6 and coal–water slurry gasification. 7 Gas–liquid jet flow can be formed by injection of a high-speed gas into a low-speed liquid, in which the liquid is exposed to strong tensile and shear stress due to the momentum exchange from the surrounding high-speed gas flow.…”

mentioning

confidence: 99%