Abstract:
A seal assembly (50) between a disc cavity and a turbine section (26) hot gas path includes a stationary vane assembly (12) with an inner shroud (16) and a rotating blade assembly (18) downstream from the vane assembly and including a plurality of blades that are supported on a platform (28) and rotate with a turbine rotor and the platform during operation of the engine. The inner shroud (16) comprises a radially innwardly facing suface (46) comprising vane grooves (60), and the platform includes a radially and axially facing surface (146), and a plurality of grooves (160) extending into the said surface. The grooves (60, 160) are arranged such that a space is defined between adjacent grooves. During operation of the engine, the grooves guide purge air out of the disc cavity toward the hot gas path such that the purge air flows in a desired direction with reference to a direction of hot gas flow through the hot gas path.
Abstract:
Die Erfindung betrifft einen Diffusor (1) einer thermischen Energiemaschine (3), insbesondere einer Gasturbine (5), mit einem Diffusoreintritt (20), mit einem Diffusoraustritt (22) und mit einer Vielzahl an Luftleitelementen (23), bei welchem ein Luftmassenstrom durch den Diffusoreintritt (20) hindurch in den Diffusor (1) hinein gelangt, und bei welchem der in den Diffusor (1) gelangte Luftmassenstrom durch den Diffusoraustritt (22) wieder aus dem Diffusor (1) hinaus gelangt und hierbei mittels der Luftleitelemente (23) als eine Vielzahl an Luftmassenpartialströmen (24) abströmt, wobei wenigstens zwei unmittelbar benachbarte Luftleitelemente (23) der Vielzahl an Luftleitelementen (23) derart ausgestaltet sind, dass deren Abströmwinkel (α n ) bezogen auf die durch die in Umfangsrichtung (25) umlaufende Austrittsöffnung (31) des Diffusoraustritts (22) ausgestaltete Umfangsfläche (32) voneinander verschieden sind.
Abstract:
A geared turbofan engine includes a first rotor, a fan, a second rotor, a gear train, a fan casing, a nacelle and a plurality of discrete acoustic liner segments. The fan is connected to the first rotor and is capable of rotation at frequencies between 200 and 6000 Hz and has a fan pressure ratio of between 1.25 and 1.60. The gear train connects the first rotor to the second rotor. The fan casing and nacelle are arranged circumferentially about a centerline and define a bypass flow duct in which the fan is disposed. The plurality of discrete acoustic liner segments with varied geometric properties are disposed along the bypass flow duct.
Abstract:
L'invention concerne une turbomachine, telle qu'un turboréacteur ou un turbopropulseur d'avion, comportant une chambre annulaire de combustion délimitée par une virole interne (3) et une virole externe (4), un distributeur de turbine (2) agencé en aval de la chambre de combustion (1), l'extrémité aval de la virole externe (4) et/ou de la virole interne (3) de la chambre comportant un rebord radial (7) disposé en regard d'un rebord radial (14) de l'extrémité amont du distributeur (2), des moyens d'étanchéité comportant au moins une lamelle (17) s'étendant entre lesdits rebords(7, 4) de façon à assurer l'étanchéité entre la chambre de combustion (1) et le distributeur (2). La lamelle d'étanchéité (17) s'étend axialement et 1 circonférentiellement entre lesdits rebords (7, 14) et prend appui de façon étanche sur les extrémités libres desdits rebords (7, 14).
Abstract:
An inter stage seal housing for a turbine engine having upper and lower half inter stage seal housings in which a contact sealing surface of the seal housing is restored after an interval of engine operation. The contact sealing surface is restored by fitting a replaceable wear strip on the downstream sealing surface of the seal housing. In order to fit the replaceable wear strip, a circumferential groove is machined along an outer peripheral edge of the seal housing. The groove is machined to include axial location and radial retention such that the wear strips can be slid into the upper half and lower half inter stage seal housing circumferentially from the horizontal joint. The groove includes through holes and the wear strips include corresponding threaded holes such that the wear strips can be fastened in the groove by fasteners and fastener retention hardware.
Abstract:
A thrust reverser system may comprise a cascade radially positioned about a centerline of an engine or a nacelle centerline. Various cascade features may be positioned at a constant radius from the centerline while other features vary according to station and/or circumferential position.
Abstract:
A seal assembly between a disc cavity and a turbine section hot gas path includes a stationary vane assembly and a rotating blade assembly downstream from the vane assembly and including a plurality of blades that are supported on a platform and rotate with a turbine rotor and the platform during operation of the engine. The platform includes a radially outwardly facing first surface, a radially inwardly facing second surface, a third surface, and a plurality of grooves extending into the third surface. The grooves are arranged such that a space is defined between adjacent grooves. During operation of the engine, the grooves guide purge air out of the disc cavity toward the hot gas path such that the purge air flows in a desired direction with reference to a direction of hot gas flow through the hot gas path.
Abstract:
A bearing support housing for a gas turbine engine includes: an annular mounting flange; a first bearing cage including: an annular first bearing support ring; and an annular array of axially-extending first spring arms interconnecting the first bearing support ring and the mounting flange; and a second bearing cage including: an annular second bearing support ring; and an annular array of axially-extending second spring arms interconnecting the second bearing support ring and the mounting flange, the second spring arms defining spaces therebetween. The first spring arms are received between the second spring arms, and the bearing cages are sized so as to permit independent flexing motion of the first and second spring arms.
Abstract:
An inter stage seal housing for a turbine engine having upper and lower half inter stage seal housings in which a contact sealing surface of the seal housing is restored after an interval of engine operation. The contact sealing surface is restored by fitting a replaceable wear strip on the downstream sealing surface of the seal housing. In order to fit the replaceable wear strip, a circumferential groove is machined along an outer peripheral edge of the seal housing. The groove is machined to include axial location and radial retention such that the wear strips can be slid into the upper half and lower half inter stage seal housing circumferentially from the horizontal joint. The groove includes through holes and the wear strips include corresponding threaded holes such that the wear strips can be fastened in the groove by fasteners and fastener retention hardware.