Definition and discussion of the intrinsic efficiency of winglets [PDF]
INCAS Bulletin, 2018 Three simple equations are derived to define the “Intrinsic Aerodynamic Efficiency of Winglets” independent of the horizontal extension of the winglet and independent of the winglet’s (relative) height.
Dieter SCHOLZ
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Control of shock-induced boundary layer separation at supersonic speeds [PDF]
, 2007 PhDThe results of a systematic experimental investigation into the effects that Sub- Boundary Layer Vortex Generators (SBVGs) have on reducing normal shock-induced turbulent boundary layer separation are presented.
Cohen, Giel S.
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Drag Reduction by Wingtip-Mounted Propellers in Distributed Propulsion Configurations
Fluids, 2022 Tip-mounted propellers can increase wing aerodynamic efficiency, and the concept is gaining appeal in the context of hybrid electrical propulsion for greener aviation, as smaller and lighter electrical motors can help with mitigating structural drawbacks
Mauro Minervino +3 more
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Investigating the effect of rotational degree of freedom on a circular cylinder at low reynolds number in cross flow [PDF]
, 2011 Numerical simulations of Vortex-Induced Vibrations (VIV) of a circular cylinder in cross flow with a rotational degree of freedom about its axis have been carried out by means of a finite-volume method.
Wissink, J +5 more
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A conceptual design methodology for low speed high altitude long endurance unmanned aerial vehicles [PDF]
, 2000 A conceptual design methodology was produced and subsequently coded into a Visual C++ (GUI) environment to facilitate the rapid comparison of several possible configurations to satisfy High Altitude Long Endurance (FIALE) unmanned aircraft (UAV ...
Altman, Aaron
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Study on Cruise Drag Characteristics of Low Drag Normal Layout Civil Aircraft
Xibei Gongye Daxue Xuebao, 2020 This paper focus on the wing shape related drag reduction measures of normal layout civil aircraft, through the drag reduction to improve the aircraft performance.
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Long-span Suspension Bridge Flutter Analysis with Drag Force Effects [PDF]
Journal of Applied and Computational Mechanics, 2021 The paper investigates the influence of the drag force onto the flutter velocity and frequency of the Akashi Kaikyo Bridge. Finite element analyses were run in ANSYS by combining unsteady lift and moment actions with: (a) unsteady drag, (b) steady drag, (
Gianfranco Piana, Alberto Carpinteri
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A Novel Control Allocation Method for Yaw Control of Tailless Aircraft
Aerospace, 2020 Tailless aircraft without vertical stabilisers typically use drag effectors in the form of spoilers or split flaps to generate control moments in yaw. This paper introduces a novel control allocation method by which full three-axis control authority can ...
Thomas R. Shearwood +3 more
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Flexible conformable hydrophobized surfaces for turbulent flow drag reduction [PDF]
, 2015 In recent years extensive work has been focused onto using superhydrophobic surfaces for drag reduction applications. Superhydrophobic surfaces retain a gas layer, called a plastron, when submerged underwater in the Cassie-Baxter state with water in ...
Fairhurst, David +5 more
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Drag Induced Lift in Granular Media
Physical Review Letters, 2011 Laboratory experiments and numerical simulation reveal that a submerged intruder dragged horizontally at constant velocity within a granular medium experiences a lift force whose sign and magnitude depend on the intruder shape. Comparing the stress on a flat plate at varied inclination angle with the local surface stress on the intruders at regions ...
Ding, Yang +2 more
openaire +4 more sources