Phase evolution of flow controlled by synthetic jets over NACA 0025 airfoil

Yang, Eric C.; Ekmekci, Alis; Sullivan, Pierre E.

doi:10.1007/s12650-021-00824-5

Cited by 13 publications

(2 citation statements)

References 25 publications

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“…Most open-source PIV algorithms are primarily developed for central processing units (CPUs) and leverage multiple cores and multiprocessing to accelerate calculations. In contrast, there are relatively fewer implementations optimized for GPUs [8,18]. GPU implementations have the potential to outpace their CPU counterparts and are essential for real-time PIV processing.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced Python-Based Open-Source Particle Image Velocimetry Software for Use with Central Processing Units

Shirinzad,

Jaber,

et al. 2023

Fluids

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Particle Image Velocimetry (PIV) is a widely used experimental technique for measuring flow. In recent years, open-source PIV software has become more popular as it offers researchers and practitioners enhanced computational capabilities. Software development for graphical processing unit (GPU) architectures requires careful algorithm design and data structure selection for optimal performance. PIV software, optimized for central processing units (CPUs), offer an alternative to specialized GPU software. In the present work, an improved algorithm for the OpenPIV–Python software (Version 0.25.1, OpenPIV, Tel Aviv-Yafo, Israel) is presented and implemented under a traditional CPU framework. The Python language was selected due to its versatility and widespread adoption. The algorithm was also tested on a supercomputing cluster, a workstation, and Google Colaboratory during the development phase. Using a known velocity field, the algorithm precisely captured the time-average flow, momentary velocity fields, and vortices.

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Section: Introductionmentioning

confidence: 99%

An Enhanced Python-Based Open-Source Particle Image Velocimetry Software for Use with Central Processing Units

Shirinzad,

Jaber,

et al. 2023

Fluids

Self Cite

View full text Add to dashboard Cite

show abstract

“…Amitay and Glezer [16] showed that when the excitation frequency matches the frequency of the wake instability, unsteady flow reattachment over an aerofoil can be achieved via large-scale vortices that attract the flow towards the trailing edge of the aerofoil. On the other hand, when the excitation frequency matches the frequency of the shear-layer instability-which is approximately one order of magnitude higher than the frequency of the wake instability-flow control is achieved by the induction of small-scale vortices that may suppress the flow separation in a large eddy sheet or the separated layer [17]. Moreover, for efficient SJA performance it is suggested to use an excitation frequency that maximises the mean jet velocity injected into the crossflow to magnify the momentum flux into the crossflow [18].…”

Section: Introductionmentioning

confidence: 99%

Jet Velocity and Acoustic Excitation Characteristics of a Synthetic Jet Actuator

Arafa

Sullivan

Ekmekci

2022

Fluids

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The effect of the excitation frequency of synthetic jet actuators on the mean jet velocity issuing from an array of circular orifices is investigated experimentally, focusing on the acoustic excitation characteristics of the actuator’s cavity. Two cavity configurations are considered. In the first configuration, synthetic jets are generated by exciting a single, large cavity having an array of sixteen orifices via sixteen piezoelectric elements. In the second configuration, the cavity volume of the first configuration is divided into eight isolated compartments, each with two orifices and two piezoelectric elements. Several distinct resonant peaks were observed in the frequency response of the synthetic jet actuator built with a single large-aspect-ratio cavity, whereas the case of compartmentalised cavities exhibited a single resonant peak. Acoustic simulations of the large-aspect-ratio-cavity volume showed that the multiple peaks in its frequency response correspond to the acoustic standing-wave mode shapes of the cavity. Due to its large aspect ratio, several acoustic mode shapes coexist in the excitation frequency range aside from the Helmholtz resonance frequency. When the actuator’s cavity volume is compartmentalised, only the Helmholtz resonance frequency is observed within the excitation frequency range.

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On the Role of the Spanwise Vortices Aligned Over an Airfoil Surface for the Flow Control

Fujii,

Abe,

Ogawa

2024

Proceedings of the Cambridge Unsteady Flow Symposium 2024

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Phase evolution of flow controlled by synthetic jets over NACA 0025 airfoil

Cited by 13 publications

References 25 publications

An Enhanced Python-Based Open-Source Particle Image Velocimetry Software for Use with Central Processing Units

An Enhanced Python-Based Open-Source Particle Image Velocimetry Software for Use with Central Processing Units

Jet Velocity and Acoustic Excitation Characteristics of a Synthetic Jet Actuator

On the Role of the Spanwise Vortices Aligned Over an Airfoil Surface for the Flow Control

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