Rotorcraft blade equipped with cavities, rotorcraft equipped with such a blade and noise reduction method

摘要

The present invention relates to a rotorcraft (1) blade (3) provided with cavities (4), said blade (3) comprising a lower surface and an upper surface each extending between a leading edge and a trailing edge, each of said cavities (4) communicating with an external environment at the level of said intrados and/or of said extrados, According to the invention, said blade (3) comprises an active system (11) for closing and conversely opening at least one of said cavities (4), said system (11) comprising at least one actuator (12) configured to close off in whole or in part said at least one cavity (4) of said blade (3) and conversely to open in whole or in part said at least a cavity (4) of said blade (3). Abstract Figure: Figure 1