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- W746794524 abstract "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. The importance of secondary shed vortices, downstream wake action, and the flow in the separated region is generally acknowledged but poorly understood. By means of surface pressure cross-correlations and flow field measurements in static stall, several new hypotheses have been generated. It is proposed that vortex shedding may be caused by acoustic disturbances propagating forward in the lower (pressure) surface boundary layer, that wake closure is a misnomer, and that the shed vortex leaves a trail of vorticity that forms a turbulent free shear layer. The known dynamic stall flow mechanisms are reviewed and the potential importance of recently proposed and hypothetical flow phenomena with respect to helicopter blade aeroelastic response are assessed." @default.
- W746794524 created "2016-06-24" @default.
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- W746794524 date "1981-03-01" @default.
- W746794524 modified "2023-09-27" @default.
- W746794524 title "Fluid mechanics mechanisms in the stall process of helicopters" @default.
- W746794524 hasPublicationYear "1981" @default.
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