Dynamic stall modeling and correlation with experimental data on airfoils and rotors [PDF]
Two methods for modeling dynamic stall have been developed. The alpha, A, B method generates lift and pitching moments as functions of angle of attack and its first two time derivatives. The coefficients are derived from experimental data for oscillating
Blackwell, R. H. +3 more
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Analysis of dynamic stall using unsteady boundary-layer theory [PDF]
The unsteady turbulent boundary layer and potential flow about a pitching airfoil are analyzed using numerical methods to determine the effect of pitch rate on the delay in forward movement of the rear flow reversal point.
Nash, J. F. +2 more
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A Jet-diffuser ejector for a V/STOL fighter [PDF]
A single ejector equipped with only one vector control jet and a diffuser flap was installed close to the leading edge of the strake of a one-fifth scale, semi-span model of the aircraft, without wing, canard, or tail surface.
Alperin, M., Wu, J. J.
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Fluid mechanics mechanisms in the stall process of helicopters [PDF]
Recent experimental results from airfoils in the Mach number, Reynolds number, or reduced frequency ranges typical of helicopter rotor blades have identified the most influential flow mechanisms in the dynamic stall process.
Young, W. H., Jr.
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A Low Cost, Low Speed Wind Tunnel For Dynamic Stall Measurement [PDF]
, 2010 Aiming to improve the knowledge on both dynamic and static stall of airfoils for wind turbine applications, a new experimental facility (CCB6 wind tunnel) specifically devoted to this application has been developed.
Meseguer Ruiz, José, Ruotolo, Andrea
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The role of time-history effects in the formulation of the aerodynamics of aircraft dynamics [PDF]
The scope of any aerodynamic formulation proposing to embrace a range of possible maneuvers is shown to be determined principally by the extent to which the aerodynamic indicial response is allowed to depend on the past motion.
Schiff, L. B., Tobak, M.
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Dynamic stall experiments on the NACA 0012 airfoil [PDF]
The flow over a NACA 0012 airfoil undergoing large oscillations in pitch was experimentally studied at a Reynolds number of and over a range of frequencies and amplitudes.
Carr, L. W. +2 more
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Dynamic stall modeling of a wind turbine airfoil at various stall-induced vibration zones
Frontiers in Energy ResearchThe present work entails investigation of the unsteady aerodynamic characteristics of a wind turbine airfoil operating in four stall-induced vibration (SIV) regimes, including normal (SIV-1) and reverse (SIV-2) flow conditions. We conducted computational
Galih Bangga +2 more
doaj +1 more source
Experimental investigation of a simple distortion index utilizing steady-state and dynamic distortions in a Mach 2.5 mixed-compression inlet and turbofan engine [PDF]
A wind tunnel investigation was conducted to determine the amplitude and spatial distribution of steady-state and dynamic distortion produced in an inlet with 45 percent of the overall supersonic area contraction occurring internally.
Costakis, W. G.
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, 2011 The dynamic process of flow separation on a stationary airfoil in a uniform flow was investigated experimentally by means of time-resolved measurements of the velocity field and the airfoil's surface pressure distribution. The unsteady movement of the separation point, the growth of the separated region, and surface pressure fluctuations were examined ...
Mulleners, Karen +3 more
openaire +2 more sources