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Airfoils and Airfoil Systems of Finite Span
1935The subject of this Chapter is the investigation of the forces experienced by an airfoil of finite span and by airfoil systems. The basic idea for the following deductions has been indicated at the end of III 32. The only point we have to add is that in the case of a single wing of ordinary type we may substitute the lift per unit span l for Λ (see III
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Cylinder-Airfoil Interactions and the Effect on Airfoil Performance
2021From micro air vehicles flying in the wake of buildings to aircraft operating in ship airwakes, turbulent flows generate unsteady aerodynamic loads on airfoils that may promote structural failure, loss of flight control, and produce noise radiation. In order to develop engineering solutions capable of mitigating these effects, accurate force prediction
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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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Unsteady flowfield and noise propagation due to transonic airfoil-airfoil interaction
AIAA Journal, 1998As a two-dimensional approximation to the outer region of a coaxial rotor, the flowfields induced by transonic airfoil-airfoil interaction are numerically simulated to investigate the aerodynamic and acoustic characteristics. The processes of aerodynamic load fluctuation are monitored with time for a transonic flowfield.
Kwanjung Yee, Dong-Ho Lee, Soogab Lee
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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 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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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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