Geometrical effects on spray characteristics of air-pressurized swirl flows

Lee, Sam-Goo

doi:10.1007/s12206-008-0420-y

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…For many designs, an L s /D s ratio ranging from 0.5 to 1.0 is assumed, although it was suggested that higher values of L s /D s , up to 2.75, might improve atomization [36]. Observations have indicated that the D 32 decreases discernibly and continuously with decreasing l 0 /d n , with the effect on D 32 in the range of 0.4-2.82 µm [37]. The drop diameters also diminished with a reduction of the inlet port area (F t ) [38].…”

Section: Introductionmentioning

confidence: 99%

Improved Atomization via a Mechanical Atomizer with Optimal Geometric Parameters and an Air-Assisted Component

Levitsky

Tavor

2020

Micromachines

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Atomization of liquid media is a key aim in various technological disciplines, and solutions that improve spray performance, while decreasing energy consumption, are in great demand. That concept is very important in the development of liquid fuel spray atomizers in high-efficiency microturbines and other generator systems with low inlet pressure and a wide range of power supply. Here we present a study of the liquid atomization characteristics for a new mechanical atomizer that has optimal geometric parameters and a preliminary swirl stage. In our air-assisted atomizer, air is introduced through a swirl chamber positioned at the exit of the mechanical atomizer. The optimized mechanical atomizer alone can achieve D32 drop diameters in the range of 80 to 40 µm at water supply pressures of 2 to 5 bar, respectively. The addition of an air swirl chamber substantially decreases drop sizes. At an air–liquid ratio (ALR) equal to 1, water pressures of 2.5 to 3 bar and air supply pressures 0.35 to 1 bar, D32 drops with diameters of 20–30 µm were obtained. In an air-assisted atomizer the parameters of the mechanical atomizer have a much stronger influence on drop diameters than do characteristics of the air-swirl chamber. Using a mechanical atomizer with optimal geometrical dimensions allows limiting the liquid supply pressure to 5 bar; but when an air-assisted component is introduced we can recommend an ALR ≈ 1 and an air supply pressure of up to 1 bar.

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Section: Introductionmentioning

confidence: 99%