Blade for a turbomachine

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 27/46 (2006.01) F03D 1/06 (2006.01)

Patent

CA 2738016

The invention relates to a blade (3) for a turbomachine, in particular for a rotor (2) of a helicopter, comprising a main section (5) that is designed to create a flow in the surrounding medium and that extends from a hub section (4) to a blade tip region (7). An end piece (6) for influencing eddy formation is provided in the blade tip region (7). To achieve a substantial noise reduction, the end piece (6) is designed as a rounded flow body comprising at least one groove (13a, 13b, 13c; 13d, 13e, 13f) originating in the transition region (12) between the body and the main section (5), substantially in the direction of the blade axis (8) and curving towards the trailing edge (11) of the blade (3).

L'invention concerne une pale (3) pour une turbomachine, en particulier pour un rotor (2) d'un hélicoptère, comportant une partie principale (5) qui est conçue pour produire un courant dans le milieu ambiant et s'étend d'une partie moyeu (4) à un bout de pale (7), un embout (6) destiné à influer sur la formation de tourbillons en bout de pale (7) étant placé en bout de pale. Une réduction sensible du niveau sonore peut être obtenue du fait que l'embout (6) est réalisé sous la forme d'un corps arrondi pourvu d'au moins une rainure (13a, 13b, 13c; 13d, 13e, 13f) qui débute dans une zone de transition (12) avec la partie principale (5), s'étend sensiblement en direction de l'axe (8) de la pale et se courbe en direction du côté aval (11) de la pale (3).

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