The effects of different jet velocities and axial misalignment on the liquid sheet of two colliding jets

Kashanj, Sina; Kebriaee, Azadeh

doi:10.1016/j.ces.2019.05.015

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…Impinging two jets with low Weber number forms the leaf shaped stable liquid sheet. Specific circumstances such as interaction with an outer object [12], imperfect impact of the two jets [13], and existence of differential in velocity of the two jets [14] can lead to perturbation and atomization of the liquid sheet. For specific range of the velocity differential, = | − | the periodic atomization of the liquid sheet known as fishbone regime has been observed [10].…”

Section: Introductionmentioning

confidence: 99%

Liquid sheet characteristics of two impinging jets with different diameters

Kashanj

Kebriaee

Saffar

2021

ICLASS

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In this paper, the liquid sheet properties of two impinging jets with different diameter are investigated with the Reynolds number of jets Re j ranging from 81 to 243. Shadowgraph imaging and image processing have been applied to capture the liquid sheet and analyse its properties. Results show that two impinging jets with different diameter but with the same velocity of the jets forms a stable and laminar liquid sheet. However, the liquid sheet of two jets with the different diameter but with the same momentum of the jets is unstable fragmenting liquid ligaments and droplets in a specific diameter difference criterion.

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Section: Introductionmentioning

confidence: 99%

Liquid sheet characteristics of two impinging jets with different diameters

Kashanj

Kebriaee

Saffar

2021

ICLASS

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Impingement of unlike-doublet liquid jets with different surface tensions

Hammad

2023

Physics of Fluids

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The effect of surface tension asymmetry on the atomization of unlike-doublet impinging jets was experimentally studied. Three typical features were identified, including wrinkled sheet edge, inner-sheet patch, and serrated bottom rim. The wrinkled sheet edge represents the propagation front of the Marangoni flow subsequent to rim encapsulation. The inner-sheet patch is caused by the through-plane mixing across the liquid sheet with uneven thickness and results in the occurrence of the serrated bottom rim. In the presence of these Marangoni-driven flow structures, the liquid sheet tends to be more unstable, and atomization is improved for unlike-doublet impinging jets, as the breakup length is reduced and smaller droplets are generated compared to like-doublet impinging jets.

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Effect of high-frequency jet velocity perturbations on impinging jets atomization characteristics

Li,

Tang,

Zhang

2023

Physics of Fluids

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The atomization characteristics of impinging jets with high-frequency jet velocity perturbations is studied numerically based on the volume of fluid method. Three typical perturbation modes are considered to mimic the velocity discrepancies of jet flow in real engine conditions. Both the perturbation amplitude and frequency are investigated independently. Results show that the liquid sheet structure and atomization characteristics are significantly changed under the intrinsic perturbation frequency. The spectrum analysis is performed to reveal the specific phenomenon and explore the mechanism of different velocity perturbation modes. The analyses show that the atomization process is sensitive to perturbation frequency but its effectiveness diminishes significantly at excessively high frequencies. Additionally, when the frequency of velocity perturbation approaches the natural intrinsic frequency of sheet waves, resonance occurs within the liquid sheet for certain perturbation mode, leading to dramatic varies in breakup length and spray angle because the velocity superposition of the intrinsic and perturbed flow and its dynamics.

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The effects of different jet velocities and axial misalignment on the liquid sheet of two colliding jets

Cited by 5 publications

References 25 publications

Liquid sheet characteristics of two impinging jets with different diameters

Liquid sheet characteristics of two impinging jets with different diameters

Impingement of unlike-doublet liquid jets with different surface tensions

Effect of high-frequency jet velocity perturbations on impinging jets atomization characteristics

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