Modification of the wake behind a circular cylinder by using synthetic jets

Tensi, J.; Boué, I.; Paille, François; Dury, G.

doi:10.1007/bf03182601

Cited by 78 publications

(45 citation statements)

References 20 publications

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“…A time-mean mass flux through the SJ actuator orifice is zero, therefore SJ is frequently named as the zero-net-mass flux jet; this phrase is credited to Cater and Soria [30]. [47]) and flow control in internal aerodynamics (Ben Chiekh et al [48]). …”

Section: Synthetic Jetsmentioning

confidence: 99%

Synthetic and Continuous Jets Impinging on a Circular Cylinder

Broučková

Trávníček

Vít

2018

Heat Transfer Engineering

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Declaration of authorshipI hereby confirm that the submitted work is entirely my own and was written only with help of referenced literature. iv AbstractSynthetic and continuous jets impinging onto an heated circular cylinder were investigated.The study was performed experimentally. For this reason, a piezoelectrically driven actuator with water as the working fluid was designed. The basic parameters of the experiments were: the slot nozzle width was 0.36 mm, the aspect ratio of the slot was 111, the cylinder diameter was 1.2 mm, and the cylinder-to-nozzle spacing related to the slot width was 5-21.

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Section: Synthetic Jetsmentioning

confidence: 99%

Synthetic and Continuous Jets Impinging on a Circular Cylinder

Broučková

Trávníček

Vít

2018

Heat Transfer Engineering

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“…With increasing frequency of synthetic jet, the lock-on effect was observed in [11,18,19]. In [12] two roughness strips (i.e. passive control) were used in combination with synthetic jet (i.e.…”

Section: Introductionmentioning

confidence: 99%

Active control of the wake behind the cylinder

et al. 2017

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Abstract. Active control of the flow around a circular cylinder using a synthetic jet (SJ) array was experimentally investigated in a small wind tunnel. The prevailing method was flow visualization. Modification of the wake was investigated at two values of a dimensionless momentum coefficient (C ȝ = 0.21 and 1.02). Various Į and C f parameters were tested (where Į is the angle between SJs and the main flow direction and C f is the frequency ratio). It was found that the control moves a separation point more downstream, i.e. the width of the wake can be reduced. Moreover, increasing frequency ratio C f causes refining of the vortex structure. When the SJs are placed at the front or rear stagnation points, the wake tends towards the symmetrical pattern.

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“…al., 2001;Duvugneau et.al., 2007;Shuster and Smith, 2007;Tensi et. al., 2002;Whitehead and Gursul, 2006;You and Moin, 2007).…”

Section: Introductionmentioning

confidence: 99%

Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets)

Nishibe

Fujita²,

Sato

et al. 2014

JFST

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Jet flows have been applied in numerous fields to control flow separation. Over the last decade, several studies on the production of synthetic jets have been performed. However, little information is available about a number of aspects concerning synthetic jets, including details of the structure and the formation mechanism of such jets. The present study attempts to clarify some of the fundamental flow characteristics of free synthetic jets on the basis of experiments and numerical simulations. Experimental velocity measurements and flow visualizations are performed using the hot-wire anemometer and the smoke wire method, respectively. It is found that both the temporal change in the flow pattern and the time-averaged velocity distribution at the centerline depend on K = ReU ̅ /S 2 (the ratio of the Reynolds number to the square of the Stokes number). The unsteady downstream flow characteristics are discussed in addition to the relation between the formative point of the synthetic jet and the value of K. Furthermore, the flow pattern and the unsteady flow characteristics of the synthetic jet are compared with those of a continuous jet.

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Modification of the wake behind a circular cylinder by using synthetic jets

Cited by 78 publications

References 20 publications

Synthetic and Continuous Jets Impinging on a Circular Cylinder

Synthetic and Continuous Jets Impinging on a Circular Cylinder

Active control of the wake behind the cylinder

Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets)

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