Flow Oscillating Characteristics of Fluidic Oscillator Pairs Using the Interbridge Method

Kwon, Hee-Soo; Lee, Eun Cheol; Roh, Tae‐Seong; Lee, Hyoung Jin

doi:10.2514/1.j060629

Cited by 5 publications

(1 citation statement)

References 28 publications

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“…They also provided a good review on the exit fan angle in FOs. Kwon et al 47 coupled a pair of FOs, bridged the backflow limbs of the two FOs in four different ways, and studied the phase synchronicity of the two offspring sweeping jets. Despite these numerous studies on FOs, the influence of geometric configuration and scale on jet oscillation frequency and other key characteristics of FO, including residence time distributions, is not adequately available.…”

Section: Introductionmentioning

confidence: 99%

Jet Oscillations and Mixing in Fluidic Oscillators: Influence of Geometric Configuration and Scale

Madane

Ranade

2023

Ind. Eng. Chem. Res.

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Fluidic oscillators (FOs) harness inherently oscillating jets for improving mixing, heat, and mass transfer and offer an attractive device platform for a wide range of applications. Despite several promising applications of FOs, the influence of their design and scale on the resulting jet oscillations and mixing has not been systematically studied. In this work, we investigated the influence of geometric configuration and device scale on jet oscillation frequency, flow, mixing, and residence time distribution (RTD). Initially, flow in FO was simulated using a two-dimensional computational fluid dynamics (CFD) model for exploring a wider parameter space. These simulations indicated that the distance of the backflow limb from the inlet and device scale are the most important design parameters influencing the jet oscillation frequency. Detailed three-dimensional CFD simulations were then carried out for the shortlisted configurations of the FO. The shortlisted configurations were fabricated, and experimental measurements of jet oscillations were carried out. The jet oscillation frequency was measured using acquired pressure fluctuation data and fast Fourier transforms. The simulated results were compared with the experimental data. The validated CFD model was then used to evaluate various flow features of FO, mixing, and liquid and solid RTD considering potential applications. The presented results will be useful for identifying suitable design and operating parameters of the FO for a variety of processes and applications.

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Section: Introductionmentioning

confidence: 99%

Jet Oscillations and Mixing in Fluidic Oscillators: Influence of Geometric Configuration and Scale

Madane

Ranade

2023

Ind. Eng. Chem. Res.

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Flow mechanism study and geometrical parameters analysis of fluidic oscillators based on pressure-sensitive paint measurements and modal analysis

Song,

Wang,

Qiu

et al. 2024

Exp Fluids

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The present study optimized some novel uidic oscillator designs, measured their internal-external uid dynamics, and used modal analysis to reveal their underlying oscillation mechanisms. It also investigated the effects of structural parameters on their uid dynamics. The time-resolved internalexternal pressure elds of the oscillators were determined by using pressure-sensitive paint (PSP) measurement. Proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) were used for modal analysis and phase reconstruction. The time-averaged pressure-eld and phasereconstruction results reveal that recirculation bubbles inside the mixing chamber and the feedback ow have underpinned the mechanism of formation of internal and external continuous sweeping ows. The modal analysis results reveal the spatial modal structures and their time evolution, which dominated the internal-external ow pattern. The inlet-wedge width and feedback-channel inlet diameter were found to be the structural parameters affecting feedback ow and recirculation-bubble size, and thereby in uenced ow characteristics such as jet oscillation frequency and divergence angle. Different Coandă surfaces altered the recirculation bubbles and feedback ow of the mainstream, thereby in uencing the formation mechanism of the sweeping jet.

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Influence of jet parameters of fluidic oscillator-type fuel injector on the mixing performance in a supersonic flow field

Lee

Roh

Lee

2023

Aerospace Science and Technology

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Flow Oscillating Characteristics of Fluidic Oscillator Pairs Using the Interbridge Method

Cited by 5 publications

References 28 publications

Jet Oscillations and Mixing in Fluidic Oscillators: Influence of Geometric Configuration and Scale

Jet Oscillations and Mixing in Fluidic Oscillators: Influence of Geometric Configuration and Scale

Flow mechanism study and geometrical parameters analysis of fluidic oscillators based on pressure-sensitive paint measurements and modal analysis

Influence of jet parameters of fluidic oscillator-type fuel injector on the mixing performance in a supersonic flow field

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