Results 201 to 210 of about 14,738 (261)
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On the Modelling of a Synthetic Jet as a Spherical Jet
Volume 1: Symposia, Parts A and B, 2007The properties of a flow field of a synthetic jet are studied using hot wire anemometry. The experimental results are compared with an analytical model of a continuous jet derived in spherical coordinates. The radial velocity profiles at various radial distances from the synthetic jet orifice, when scaled appropriately collapse into a single self ...
Gopi Krishnan, Kamran Mohseni
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Jet vectoring using synthetic jets
Journal of Fluid Mechanics, 2002The interaction between a conventional rectangular (primary) air jet and a co-flowing synthetic jet is investigated experimentally. The nozzles of both jets have the same long dimension but the aspect ratio of the synthetic jet orifice is 25 times larger.
Smith, B. L., Glezer, A.
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Numerical investigation of synthetic jet flowfields
29th AIAA, Fluid Dynamics Conference, 1998The flowflelds surrounding a synthetic-jet actuating device are investigated numerically by direct simulation. Solutions are obtained to the unsteady compressible Navier-Stokes equations for both the interior of the actuator cavity and for the external jet flowfield.
Donald P. Rizzetta +2 more
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Hybrid synthetic jets as the nonzero-net-mass-flux synthetic jets
Physics of Fluids, 2006The “hybrid synthetic jet” combines the zero-net-mass-flux synthetic jet and fluidic pumping through a valveless pump. No fluid is supplied from an external source (blower or compressor). Hot-wire experiments on a demonstration model confirm that the hybrid synthetic jet exhibits a higher extrusion volume flow rate than the ordinary synthetic jet.
Zdeněk Trávníček +2 more
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Sensors and Actuators A: Physical, 2012
Abstract This paper is a sequel to several recent papers that analysed experimental data on axisymmetric synthetic jets using similarity transformation of governing equations involving a one-equation model of turbulence. Unusual feature there is variation of parameters (“constants”) in transformed equations along the synthetic jet axis. Interestingly,
Václav Tesař, Jozef Kordík
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Abstract This paper is a sequel to several recent papers that analysed experimental data on axisymmetric synthetic jets using similarity transformation of governing equations involving a one-equation model of turbulence. Unusual feature there is variation of parameters (“constants”) in transformed equations along the synthetic jet axis. Interestingly,
Václav Tesař, Jozef Kordík
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A Jet Formation Criterion for Synthetic Jet Actuators
41st Aerospace Sciences Meeting and Exhibit, 2003This paper proposes and validates a jet formation criterion for synthetic jet actuators. The synthetic jet is a zero net mass flux device, adding additional momentum but no mass to its surroundings. Jet formation is defined as a mean outward velocity along the jet axis and corresponds to the clear formation of shed vortices.
Yogen Utturkar +5 more
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A comparison between synthetic jets and continuous jets
Experiments in Fluids, 2003Experimental measurements and flow visualiza- tion of synthetic jets and continuous jets with matched Reynolds numbers are described. Although they have the same profile shape, synthetic jets are wider and slower than matched continuous jets. The synthetic jets are ex- amined at higher Reynolds numbers than previously studied and over a large range of ...
B. L. Smith, G. W. Swift
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Directional control of a jet using synthetic jets
AIP Conference Proceedings, 2017The paper presents an application of synthetic jets in the flow control of a jet. The synthetic jet actuator consists of an oscillating membrane operating at high frequency and separating two cavities with exit slots of different geometries. The synthetic jets work as an alternating push-pull system and the generated vortical structure changes the flow
Florin Frunzulica +3 more
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On the near field of an axisymmetric synthetic jet
Fluid Dynamics Research, 2007The axisymmetric synthetic jet produced by an oscillating piston has been investigated experimentally. The study was performed in water using digital particle image velocimetry for the instantaneous velocity planar measurements. The near field, up to x/d0 ≈ 6, was investigated for three different Reynolds numbers.
DI CICCA, Gaetano Maria, IUSO, Gaetano
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Modelling of the Characteristics of Synthetic Jet Actuators
35th AIAA Fluid Dynamics Conference and Exhibit, 2005In this paper, a simple static compressible model and a dynamic incompressible model for circular synthetic jet actuators are described. They are used to investigate the effect of changing actuator geometrical and operating parameters on the magnitude of jet peak velocity at the orifice exit.
Tang, H., Zhong, S.
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