| 摘要 |
<p>High lift rotor or stator blades with multiple adjacent airfoils cross-section, constituted from a main fin 1 and from at least one other secondary fin 2 and/or 3 joined through a root h and a tip t, and in the span between the root and tip is always imaginable a main airfoil P that circumscribes all the fin's airfoils. The peculiarity of this blades consists in the slots between the fins that enables transfering part of the air-flow with high energy, from the lower to the upper surface of the blades, with consequent increases of the boundary layer energy on the upper surface. Adopting the slots is possible to design blades that have both the camber and the surface greater than the actual blades in use, consequently increasing the lift and delaying the onset of the stall flutter.</p> |
