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Passive Laminar Flow Control at Low Turbulence Levels
AIAA Journal, 2014S PANWISE arrays of discrete roughness elements (DREs) are used in wind tunnel and flight experiments to excite stationary crossflow vortices (a recent example is [1]). Because flight turbulence intensities are low, the stationary crossflow mode dominates the traveling mode in that environment and leaves surface roughness as the important initiator of ...
Erica N. Lovig +2 more
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Passive Boundary Layer Flow Control Using Porous Lamination
Transport in Porous Media, 2018The flow over a porous laminated flat plate is investigated from a flow control perspective through experiments and computations. A square array of circular cylinders is used to model the porous lamination. We determine the velocities at the fluid–porous interface by solving the two-dimensional Navier–Stokes and the continuity equations using a ...
K. Aswathy Nair, A. Sameen, S. Anil Lal
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Large-Eddy Simulation of Passively-Controlled Transonic Cavity Flow
2009A 30 dB reduction of the peak pressure tone and a reduction by 6 dB of the background pressure found in an experiment of high-subsonic cavity flow controlled by a spanwise rod is retrieved numerically. The injection of deterministic upstream fluctuations in the LES domain is found to be of crucial importance, in contrast with the baseflow case ...
Comte, P., Daude, F., Mary, I.
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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 separation control in a vaned radial diffuser
Stability and performance are pursued by the aeronautic industry as market constraints become more compelling. The present study focuses on the implementation of a passive flow control system in the vaned radial diffuser of a centrifugal compressor. The flow control consists of holes in both the hub and the shroud, connecting interblade channels with ...Boulay, Aurélien +3 more
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Bionic passive flow control of blade tip vortex
Physics of FluidsThe blade tip vortex is a primary contributor to helicopter blade vortex interference noise. The effects of wave crest number, wave crest amplitude, and bottom-to-top ratio on the suppression of the blade tip vortex were investigated through numerical simulations under an incoming flow at Mach 0.3. The results show that a pinnately crested bionic blade
Rubing Liu +3 more
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Passive and Active Control of Radiative Heat Flow
2019Materials that control the absorption and emission of thermal radiation have attracted renewed interest for energy applications. Materials of interest include those with static optical properties that vary with photon wavelength in a desired manner as well as those with dynamic properties that can be actively tuned by external stimuli.
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Cervical cancer prevention and control in women living with human immunodeficiency virus
Ca-A Cancer Journal for Clinicians, 2021Philip E Castle, Vikrant V Sahasrabuddhe
exaly
Flow control: passive, active, and reactive flow management
Choice Reviews Online, 2001openaire +1 more source