Results 141 to 150 of about 110,436 (201)
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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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Two-Dimensional Synthetic Jet Simulation
AIAA Journal, 2000Direct numerical simulation was used to model an array of two-dimensional synthetic slot jets pulsing into initially quiescent e ow. Such zero-net mass-e ux jets can represent an array of microelectromechanical systems. Fluid ejected by the pulsing jets rolls up into vortex pairs that propagate as a result of their mutually induced velocity ...
Conrad Lee, David Goldstein
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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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Axisymmetric coaxial synthetic jets
40th AIAA Aerospace Sciences Meeting & Exhibit, 2002Measurements were made in the near field of piston driven axisymmetric coaxial synthetic jets emanating from an orifice and a surrounding annulus of equal exit areas and cavity volumes. Piston velocity, amplitude, radial spacing between the orifice and the annulus, and exit angles had a strong influence on the dominant features of the flow.
Z. Bangash, A. Ahmed
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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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Displacement amplified synthetic jets
SPIE Proceedings, 2014Synthetic ynthetic jet actuators are attractive devices for active flow control because, in contrast to many other actuators, they do not require a pressurized air source. Instead, they cyclically ingest and expel air from the external flow that is being controlled.
Steve Griffin +2 more
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Plasma Synthetic Jet for Flow Control
40th Fluid Dynamics Conference and Exhibit, 2010The necessity of having an efficient actuator to control flow has driven ONERA to develop a pioneer actuator called Plasma Synthetic Jet (PSJ). This actuator was inspired by the John Hopkins University device. It produces a high exhaust velocity jet using electrical power.
Hardy, Pierrick +5 more
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Modified flapping jet for increased jet spreading using synthetic jets
International Journal of Heat and Fluid Flow, 2011Abstract The present paper is an experimental investigation, using a PIV system, on modified rectangular jet flow co-flowing with a pair of synthetic jets placed symmetrically with respect to the geometric centerline of the main flow. The objective was to determine the optimal forcing conditions that would result in jet spreading beyond what would be
Maher Ben Chiekh +2 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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