Axial flow turbo compressor

F - Mech Eng,Light,Heat,Weapons – 04 – D

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F04D 29/54 (2006.01) F04D 19/02 (2006.01) F04D 29/32 (2006.01)

Patent

CA 2427600

An axial flow compressor including one or more axially spaced stator sections (14) each having a circumferential array of guide vanes (15), and one or more rotor section (12, 16) each having a circumferential array of rotor blades (13, 17; A, B), and between successive rotor blades (A, B) there are formed flow paths and between the stator and rotor sections there are provided axial gaps (22, 23, 24) of a diverging configuration so as to form in each flow path a diffusion region (C) which extends from a narrowest cross section (a2) of the flow path located at a certain distance upstream of the leading edge of a second rotor blade (B) to a wider cross section (a3) located approximately at the leading edge of the second rotor blade (B), wherein each flow path has a transition region (D) of a substantially non-increasing cross sectional area extending from the wider cross section (a3) to the trailing edges of the rotor blades (A, B).

L'invention concerne un turbocompresseur à écoulement axial comprenant une ou plusieurs parties stator espacées axialement (14) ayant chacune un réseau circonférentiel d'aubes directrices (15), et une ou plusieurs parties rotor (12, 16) ayant chacune un réseau circonférentiel d'ailettes de rotor (13, 17; A, B). Entre les ailettes de rotor successives (A, B), on trouve des chemins d'écoulement, tandis qu'entre les parties stator et rotor, on trouve des espaces axiaux (22, 23, 24) dont la configuration diverge, de façon à former dans chaque chemin d'écoulement, une zone de diffusion (C) qui s'étend de la section transversale la plus étroite (a¿2?) du chemin d'écoulement situé à une certaine distance en amont du bord d'attaque d'une seconde ailette de rotor (B) à une section transversale plus large (a¿3?) située approximativement sur le bord d'attaque de la seconde ailette de rotor (B), chaque chemin d'écoulement comprenant une zone de transition (D) d'une zone de section transversale n'augmentant sensiblement pas qui s'étend de la section transversale plus large (a¿3?) aux bords arrière des ailettes de rotor (A, B).

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