Mid-wake wing tip vortex dynamics with active flow control

Dghim, Marouen; Ferchichi, Mohsen; Fellouah, Hachimi

doi:10.1016/j.expthermflusci.2018.05.011

Cited by 14 publications

(9 citation statements)

References 41 publications

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“…Both active and passive methodologies have been used to mitigate tip vortices. Synthetic jets at the tips of the wing [4,5] and oscillating flaps and winglets [6] are examples of the former and further extensive reviews of active methodologies are provided by Crouch [7] and Gursul & Wang [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Multiscale Endplates on Wing-Tip Vortex

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Effect of Multiscale Endplates on Wing-Tip Vortex

et al. 2021

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“…Their vast application ranges from the understanding of fundamental mechanisms such as turbulence production and decay (Dairay, Obligado & Vassilicos 2015; Zhou et al. 2018, 2019; Cafiero & Vassilicos 2019), modelling of mixing in rivers and estuaries (Stansby 2003; Cafiero & Woods 2016), application for flow control and drag reduction (Dghim, Ferchichi & Fellouah 2018; Cannata, Cafiero & Iuso 2019) and heat transfer enhancement (Carlomagno & Ianiro 2014; Cafiero et al. 2017), to cite some.…”

Section: Introductionmentioning

confidence: 99%

Turbulence properties in jets with fractal grid turbulence

2021

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“…Other solutions focused on unsteady manipulations of the wake, to exploit the natural instabilities of the flow or locally manipulate the flow structure [17][18][19][20]. This is widely used in several fields, such as jets excitation [21], induced drag reduction [22], and wall turbulence control [23]. In the case of road vehicles, Barros et al (2016) [24] investigated the implementation of pulsed jets along with Coanda effect.…”

Section: Introductionmentioning

confidence: 99%

Active Flow Control on a Square-Back Road Vehicle

Cerutti

Sardu

Cafiero

et al. 2020

Fluids

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An experimental investigation focused on the manipulation of the wake generated by a square back car model is presented. Four continuously-blowing rectangular slot jets were mounted on the rear face of a 1:10 commercial van model. Load cell measurements evidence drag reduction for different forcing configurations, reaching a maximum of 12% for lateral and bottom jets blowing. The spectral analysis of the pressure fluctuations evidence, for all forced cases, an energy attenuation with respect to the natural case, especially close to the shedding frequency. An energy budget highlighted the most efficient forcing configurations accounting for both the drag reduction and the power required to feed the blowing system. Two main configurations are considered: the maximum drag reduction and the best compromise, yielding 5% drag reduction and a convenient energy balance. Particle Image Velocimetry (pPIV) and stereoscopic PIV (sPIV) experiments were performed allowing the three-dimensional reconstruction of the wake in the three considered configurations. Consistently with static and fluctuating pressure measurements, sPIV results reveal a dramatic change in the wake structure when the jets blow in the maximum drag reduction configuration. Conversely, the best compromise configuration reveals a wake structure similar to the natural one.

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Mid-wake wing tip vortex dynamics with active flow control

Cited by 14 publications

References 41 publications

Effect of Multiscale Endplates on Wing-Tip Vortex

Effect of Multiscale Endplates on Wing-Tip Vortex

Turbulence properties in jets with fractal grid turbulence

Active Flow Control on a Square-Back Road Vehicle

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