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Showing 1 to 5 of 5 for “"drag reductions"”.
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Optimum Spanloads Incorporating Wing Structural Considerations And Formation Flying
The classic minimum induced drag spanload is not necessarily the best choice for an aircraft. For a single aircraft configuration, variations from the elliptic, minimum drag optimum load distribution can produce wing weight savings that result in airplane performance benefits. For a group of …
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Aerodynamic and Performance Analysis of a Morphing Helicopter Rotor System
… test data of a UH-60. Effects on power, lift to drag ratio and rotor drag from variations in blade twist, rotor speed, rotor radius and blade chord was analyzed. Morphing cases were applied as linear functions of airspeed. Linearly varying rotor speed provides the most benefits at higher …
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Aerodynamic Design Sensitivities on an Unstructured Mesh Using the Navier-Stokes Equations and a Discrete Adjoint Formulation
… transonic flows over an ONERA M6 wing, and drag reductions are demonstrated.
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Skin friction drag reduction in turbulent flows using superhydrophobic surfaces
… shear stress on the wall. Five prototype drag-reducing surfaces were evaluated experimentally as possible candidates for turbulent drag reduction applications, using a combination of flow tests, surface profile measurements, and contact angle goniometry. Three of these were randomly rough …
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Struktur-Wirkungsbeziehungen bei der Verminderung der Wandreibung in Strömungssystemen durch supramolekulare Strukturen
Flowing liquids in pipe systems cause pressure drops and energy losses and can be responsible for the initiation of flow induced localized corrosion (FILC). Initiation of FILC is affected by unfavourable geometric conditions in flow systems and local flow intensities above critical values. Many …