Results 241 to 250 of about 12,588,899 (282)
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Flow Seperation and Passive Flow Control on E387 Airfoil
54th AIAA Aerospace Sciences Meeting, 2016The behavior of a MVG vane at three different design angles was simulated with LES on an Eppler e387 airfoil that was suffering flow separation. The e387 airfoil was placed at an angle of attack of 12 degrees and at Reynolds number of 200,000 based on the chord length. Different parameters of the generated vortex from the MVG were analyzed to study the
Andrew Heffron +2 more
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Passive flow control of bileaflet mechanical heart valve leakage flow
Journal of Biomechanics, 2008Blood damage and platelet activation are inherent problems with present day mechanical heart valve designs. We investigate the approach of passive flow control applied to bileaflet mechanical heart valve (BMHV) flows as a means of optimizing leakage flow hemodynamics at length scales relevant to blood damage and platelet activation.
Lakshmi P, Dasi +3 more
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Passive Control of Flow Induced Vibrations by Splitter Blades
Volume 2: Combustion and Fuels; Oil and Gas Applications; Cycle Innovations; Heat Transfer; Electric Power; Industrial and Cogeneration; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; IGTI Scholar Award, 1993Splitter blades as a passive control technique for flow induced vibrations is investigated by developing an unsteady aerodynamic model to predict the effect of incorporating splitter blades into the design of an axial flow blade row operating in an incompressible flow field.
H. W. D. Chiang, S. Fleeter
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Passive Control of Pressure Fluctuations Generated by Separated Flow
AIAA Journal, 1996Measurements of wall-pressure fluctuations have been made in the flow behind a backward-facing step, with a permeable reattachment surface Different configurations are tried, the most successful producing a reduction in peak rms pressure fluctuation of about 13% and a reduction in drag of about 9%.
A. Heenan, J. Morrison
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Flow around a semicircular cylinder with passive flow control mechanisms
Experiments in Fluids, 2017Wind tunnel experiments were performed to study the effect of passive flow control strategies on the wake and drag of a semicircular cylinder of infinite aspect ratio. High-resolution planar particle image velocimetry was used to obtain flow statistics around the semicircular cylinder at Reynolds number
A. M. Hamed +3 more
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Using Non-Normality for Passive Laminar Flow Control
2008The scope of this paper was to show how optimal transient growth due to non-normality can be used as an effective amplifier of a passive laminar flow control. Optimal perturbations, usually seen as the most dangerous for transition are here seen as the most effective for control.
C. Cossu +3 more
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Flow Control of Jet Flow by Passive Nozzle Configuration Changes
International Journal of Flow Control, 2009Nozzle configuration may offer the possibility of a passive control technique to provide high mixing and heat transfer rates. Thus, numbers of investigations have been carried out to reveal the influence of nozzle configuration on the flow characteristics. However, very few papers in the scientific literature have focused on orifice jets.
null Shakouchi +4 more
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Sensitivity analysis and passive control of cylinder flow
Journal of Fluid Mechanics, 2008A general theoretical formalism is developed to assess how base-flow modifications may alter the stability properties of flows studied in a global approach of linear stability theory. It also comprises a systematic approach to the passive control of globally unstable flows by the use of small control devices.
Marquet, Olivier +2 more
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Passive Flow Control of Ship Air Wakes
Proceedings of the Vertical Flight Society 69th Annual Forum and Technology Display, 2013Passive flow control of ship air wakes was investigated to determine the impact of a solid, notched fence design and to determine the applicability of using computational fluid dynamics (CFD) and wind tunnel testing to predict changes in ship air wakes.
HyungSuk Kang +2 more
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Passive Flow Control Applied to a NACA23012 Airfoil In A Subsonic Flow
33rd AIAA Applied Aerodynamics Conference, 2015Aerodynamic subsonic flows are an important flow regime for the aeronautical/aerospace industry. Recent studies by the author have shown that the use of an active flow control device, that of a localised asymmetrically located synthetic jet, can significantly improve the aerodynamic performance of bluff and streamlined bodies by altering the three ...
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