Results 161 to 170 of about 36,102 (211)
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Airfoil Design and Optimization
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2001AbstractThe aerodynamic efficiency of mildly swept wings is mainly influenced by the characteristics of the airfoil sections. The specific design of airfoils is therefore one of the classical tasks of aerodynamics. Since the airfoil characteristics are directly dependent on the inviscid pressure distribution the application of inverse calculation ...
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Bézier presentation of airfoils
Computer Aided Geometric Design, 1987Bézier presentations and cubic spline presentations of NACA-4-digit airfoils are developed and their errors are discussed. The given representations may help to use the Bernstein-Bézier technique in the design process of wings.
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A geometric approximation-based airfoil data augmentation for airfoil classification
Aerospace Science and TechnologyThis paper proposes a Geometric Approximation-based Airfoil Data Augmentation method and applies it to the classification of transonic airfoils. The method comprises two stages: geometric approximation and sample screening. Specifically, the geometric approximation stage employs an optimization-based strategy to generate a large set of candidate ...
Shutao Sun, Yanhui Duan
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Airfoil gust response and the sound produced by airfoil-vortex interaction
Journal of Sound and Vibration, 1984This paper contributes to the understanding of the noise generation process of an airfoil encountering an unsteady upwash. By using a fast Fourier transform together with accurate airfoil response functions, the lift-time waveform for an airfoil encountering a delta function gust (the indicial function) is calculated for a flat plate airfoil in a ...
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Effect of airfoil thickness on gust–airfoil interaction noise
Physics of FluidsInteraction between turbulence and an airfoil is a significant aerodynamic noise source for many engineering applications when turbulence in the wake of upstream blades interacts with the leading edge of downstream blades. Modeling the oncoming turbulence as harmonic gusts is a common approach to study the noise generated by turbulence–airfoil ...
Shujie Jiang +5 more
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Airfoil-vortex interaction and the wake of an oscillating airfoil
2014Ph. D.
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1958
Publisher Summary The unsteady airfoil theory refers to the part of aerodynamics that considers the calculation of the pressure distribution over an airfoil moving with constant speed while performing an unsteady motion in the direction perpendicular to its plane.
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Publisher Summary The unsteady airfoil theory refers to the part of aerodynamics that considers the calculation of the pressure distribution over an airfoil moving with constant speed while performing an unsteady motion in the direction perpendicular to its plane.
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Derivation of Four-Digit Airfoils from the Sunya Airfoil
Journal of Aircraft, 1997A class of four-digit airfoil profiles is obtained on the basis of Ramamoorthy's (1995) 'Sunya' airfoil analytical representation. It is shown that the Sunya airfoil, described by a simple analytical expression, may be considered as a standard for all single-parameter airfoils.
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Research on aerodynamic performance of a novel dolphin head-shaped bionic airfoil
Energy, 2021Ying Wang
exaly
Low-Reynolds-number airfoil design optimization using deep-learning-based tailored airfoil modes
Aerospace Science and Technology, 2022Mengqi Zhang, Ningyu Liu, Jichao Li
exaly