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Lift-enhancing tabs on swept, three-dimensional high-lift systems
14th Applied Aerodynamics Conference, 1996A three-dimensional high-lift system was computationally simulated to investigate the effectiveness of lift-enhancing tabs on swept wings. The computations were performed by solving the incompressible Navier-Stokes equations on structured, overset grids, and the effects of turbulence were simulated using the one-equation Baldwin-Barth model.
Donovan L. Mathias +2 more
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Random Roughness Enhances Lift in Supersonic Flow
Physical Review Letters, 2007We study the scattering of shock waves by a rough wedge using second-order perturbation analysis and stochastic simulations employed synergistically to cover a large range in correlation length A and amplitude epsilon of the profile roughness (with length d).
Guang, Lin +2 more
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High-Lift Enhancement Using Active Flow Control
6th AIAA Flow Control Conference, 2011The high-lift performance of an airfoil with a single-element flap is enhanced using fluidic actuation based on synthetic jet technology. Acutation is implemented using a spanwise array of individually controlled discrete synthetic jets with variable spanwise spacing that issue in a direction nominally-tangential to the flap immediately upstream of ...
Michael Desalvo +2 more
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Dry eye after LASIK enhancement by flap lifting
American Journal of Ophthalmology, 2006ABSTRACT PURPOSE: To determine whether dry eye after LASIK recurs after LASIK enhancement. METHODS: A total of 63 eyes of 42 patients who underwent LASIK enhancement were included in this study. Subjective dry eye symptoms, tear break-up time (BUT), Schirmer test with anesthesia, fluorescein staining of the cornea, and corneal ...
Ikuko, Toda +3 more
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Enhancing the lift under budget constraints
Proceedings of the eleventh ACM SIGKDD international conference on Knowledge discovery in data mining, 2005A lift curve, with the true positive rate on the y-axis and the customer pull (or contact) rate on the x-axis, is often used to depict the model performance in many data mining applications, especially in the area of customer relationship management (CRM).
Lian Yan +2 more
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High-Lift Enhancement Using Fluidic Actuation
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010The performance of an airfoil equipped with a high-lift system based on a single-element flap configuration is enhanced by the manipulation of vorticity concentrations near the airfoil surface using fluidic actuation. The actuation, which is effected downstream of the juncture between the main airfoil body and the flap, leads to a significant extension
Michael DeSalvo +2 more
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Covert-inspired flaps for lift enhancement and stall mitigation
Bioinspiration & Biomimetics, 2021Even though unmanned aerial vehicles (UAVs) are taking on more expansive roles in military and commercial applications, their adaptability and agility are still inferior to that of their biological counterparts like birds, especially at low and moderate Reynolds numbers.
Chengfang Duan, Aimy Wissa
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Lift enhancement by an externally trapped vortex
10th Fluid and Plasmadynamics Conference, 1977A theoretical study is made of the performance capabilities of a lift concept that utilizes a spanwise vortex over the upper surface of the wing. The vortex is generated by a vertical flap near the leading edge of the wing and maintained by suction through orifices in endplates at the wingtip.
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Lift Enhancement over Flexible Nonslender Delta Wings
AIAA Journal, 2007Unsteady aerodynamics of flexible nonslender delta wings is investigated in an experimental study using various techniques. Dramatic fluid/structure interactions emerge with increasing wing flexibility and result in substantial lift enhancement in the poststall region.
G. Taylor +3 more
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Image enhancement in lifting wavelet transform domain
AIP Conference Proceedings, 2019In this paper, the scheme of image enhancement in lifting wavelet transform (LWT) domain using the singular value decomposition (SVD) and artificial bee colony (ABC) algorithm is proposed. The proposed algorithm uses 1-level LWT to break up the original image into different subbands and the LL subband is utilized for adaptive thresholding whereas ABC ...
Anuj Bhardwaj +2 more
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