Study on the Spray Characteristics and Oscillation Mechanism of a Feedback-Free Internal Impinging Nozzle

Wu, Zhijun; Zhao, Wenbo; Hu, Zongjie; Xie, Wei; Wang, Yufeng; Li, Liguang

doi:10.1007/s10494-021-00255-0

Cited by 3 publications

(4 citation statements)

References 32 publications

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“…The total grid number of the computation domain was 1.1 million. The grid dependence test has been accomplished in our previous work, which will not be introduced in this paper [20].…”

Section: Methodsmentioning

confidence: 99%

“…The total grid number of the computation domain was 1.1 million. The grid dependence test has been accomplished in our previous work, which will not be introduced in this paper [20]. The entire computational domain contains the flow field mesh inside and outside the oscillator.…”

Section: Methodsmentioning

confidence: 99%

“…The numerical method can elaborate the mechanism from a wider range of perspectives. Wu [20] presented a 3D CFD simulation to analyze the oscillation mechanism and its influence on spray oscillation behaviors. The results indicated that the periodic growth and merger of vortices lead to a periodic inversion of the pressure gradient between the left and right of the impact chamber, resulting in the oscillation behavior of the main jet.…”

Section: Introductionmentioning

confidence: 99%

“…As for the spray characteristics of the feedback-free fluidic oscillator, researchers [21,22] usually focus on the sweep angle, oscillation frequency, and volume flow rate. Wu [20] found a bi-model spray spatial flow distribution with varying oscillation frequency and a constant sweep angle. The spray characteristics are dictated by the geometry of the oscillator, whether it is a feedback-type fluidic oscillator or a feedback-free fluidic oscillator [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of Internal Structural Parameters on the Inner Flow and Outer Spray Characteristics for Feedback-Free Fluidic Oscillator

Leng

Gao

et al. 2023

Processes

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Feedback-free fluidic oscillators, relying on the interaction of jets to oscillate, have a wide range of operation frequencies and no moving parts, which is promising for future applications. In this paper, the sweep angle, oscillation frequency, and volume flow rate of the feedback-free fluidic oscillator with a cavity width of 4.6 mm were measured experimentally, and the sweeping mechanism was analyzed based on the internal flow simulation. The influence of the impact angle, cavity exit width, and shoulder radius on the internal flow and external spray characteristics was analyzed by the numerical method. The results show that the sweep angle and oscillation frequency are affected throughout the increase in impact angle from 80° to 120°. However, only when the SR is greater than 0.88 mm does the internal flow and spray state change significantly. The volume flow rate is mainly affected by the cavity exit width and increases linearly from 5.3 mL/s to 9.3 mL/s as the width increases from 0.45 mm to 0.85 mm. It can be surmised that the sweep angle is approximately linear with the distance between the hit point and the impact cavity centerline.

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“…The total grid number of the computation domain was 1.1 million. The grid dependence test has been accomplished in our previous work, which will not be introduced in this paper [20].…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Internal Structural Parameters on the Inner Flow and Outer Spray Characteristics for Feedback-Free Fluidic Oscillator

Leng

Gao

et al. 2023

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Research of the Flow Field Characteristics of Flake Graphite in the Fan Shaped Nozzle of Premixed Water Jet

Dong,

Guo,

Chen

et al. 2024

Lecture Notes in Mechanical Engineering

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Graphite is an important strategic resource, in order to explore the flow performance of flake graphite in the flow field of the premixed water jet fan nozzle, numerical simulation of nozzle flow field was carried out by FLUENT software. According to the jet characteristics, the Euler model is selected to simulate the two-phase flow law of water and flake graphite, and standard k-ε turbulence model is selected as the turbulence model, the influence of different inlet pressure on the flow field distribution of flake graphite was analyzed. The results show that the axial velocity distribution of flake graphite flow field under different inlet pressures is similar, and the distribution cloud chart has significant plane symmetry, the jet plane diffuses outward at a certain angle. With the increase of target distance, the jet section changes from a flat structure to a symmetrical “groove” structure with high ends and low middle, the axial velocity of flake graphite flow field has secondary acceleration in the internal flow field and primary acceleration in the outward flow field, the maximum axial velocity appears near the nozzle outlet.

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Numerical parametric study of a sweeping-vortex low-frequency fluidic oscillator

Yang,

Zhang,

Luo

et al. 2024

International Journal of Mechanical Sciences

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Study on the Spray Characteristics and Oscillation Mechanism of a Feedback-Free Internal Impinging Nozzle

Cited by 3 publications

References 32 publications

Influence of Internal Structural Parameters on the Inner Flow and Outer Spray Characteristics for Feedback-Free Fluidic Oscillator

Influence of Internal Structural Parameters on the Inner Flow and Outer Spray Characteristics for Feedback-Free Fluidic Oscillator

Research of the Flow Field Characteristics of Flake Graphite in the Fan Shaped Nozzle of Premixed Water Jet

Numerical parametric study of a sweeping-vortex low-frequency fluidic oscillator

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