Results 191 to 200 of about 4,618,854 (237)

Effects of compressibility on dynamic stall

AIAA Journal, 1991
In this paper, typical computational predictions and experimental measurements of compressible flow past an airfoil at dynamic stall conditions are studied and compared to develop an insight into the effect of compressibility on dynamic stall. The dependency of the critical Mach number on airfoil leading edge curvature, camber, and angle of attack is ...
K.-Y. Fung, L. W. Carr
openaire   +1 more source

Revisiting unresolved dynamic stall phenomena

38th Aerospace Sciences Meeting and Exhibit, 2000
In a series of dynamic stall tests, performed 1968 with a finite-span wing model having a NACA-0012 airfoil section, very unusual C,(a) characteristics were obtained by varying the Reynolds number as well as using fixed and free boundary layer transition.
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The effects of compressibility on dynamic stall

1st National Fluid Dynamics Conference, 1988
In this paper, typical computational predictions and experimental measurements of compressible flow past an airfoil at dynamic stall conditions are studied and compared to develop an insight into the effect of compressibility on dynamic stall. The dependency of the critical Mach number on airfoil leading edge curvature, camber, and angle of attack is ...
K.-Y. FUNG, L. CARR
openaire   +1 more source

Flight dynamics and control in relation to stall

2012 American Control Conference (ACC), 2012
Control of fixed-wing aircraft at high angles of attack is particularly challenging. In this case, aerodynamic forces can be subjected to strong variations, among which stall is certainly the most critical. This paper tackles flight dynamics and control for aerial vehicles subjected to the stall phenomenon.
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Effects of Dynamic Stall on SWECS

Journal of Solar Energy Engineering, 1982
A study of dynamic stall is presented in order to define its influence on the airfoil force and moment coefficients so that these effects can be included in the calculation of small wind energy conversion system (SWECS) loads and responses. A review of past work indicates that semiempirical methods are best suited to SWECS requirements. A definition of
R. B. Noll, N. D. Ham
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Some Measurements on Dynamic Stall

Journal of Aircraft, 1974
Details of a flow oscillation device and of force and moment measurements on a 2 ft chord twodimensional NACA 0012-64 airfoil in the oscillating flow and oscillated in pitch in a steady flow through stall are presented. Results indicate that both methods give essentially the same description of the dynamic stall process.
A. G. Parker, J. Bicknell
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Optimization of Blowing Jet Performance on Wind Turbine Airfoil Under Dynamic Stall Conditions Using Active Machine Learning and Computational Intelligence

The Arabian journal for science and engineering, 2023
Siroos Kasmaiee, ·. M. Tadjfar, Saman Kasmaiee   +2 more
semanticscholar   +1 more source

Large eddy simulation of dynamic stall flow control for wind turbine airfoil using plasma actuator

, 2020
To solve aerodynamic performance deterioration caused by dynamic stall, a large eddy simulation numerical calculation based on dynamic grid and sliding grid technology was conducted and the dynamic flow control mechanism of unsteady pulsed plasma was ...
L. Guoqiang, Yi Shi-he
semanticscholar   +1 more source

Analysis of the onset of dynamic stall

AIAA Journal, 1992
The dynamic stall characteristics of several airfoils have been investigated to assess the effects of compressibility, unsteadiness, and airfoil geometry on the onset of dynamic stall. For the purpose of understanding the physical phenomena in the range of low reduced frequency of practical importance, it is found that the flow before the onset of ...
Jeffrey M. Currier, K.-Y. Fung
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Shock-induced dynamic stall

21st Aerospace Sciences Meeting, 1983
At freestream Mach numbers above M= 0 3 shock/boundary layer interaction begins to complicate the unsteady airfoil stall characteristics The present paper shows how theoretical relationships can be developed for the interdependence between unsteady and steady characteristics to provide the means whereby the shock induced dynamic stall characteristics ...
L. E. Ericsson, J. P. Reding
openaire   +1 more source