Abstract:
Préforme fibreuse pour une aube creuse de turbomachine, une telle aube creuse, ainsi qu'un procédé de fabrication d'une telle aube creuse. La préforme comprend une première structure fibreuse (41') obtenue par tissage tridimensionnel comportant au moins une portion longitudinale principale (46, 47) apte à former essentiellement une paroi intrados de pale, une deuxième structure fibreuse (42') obtenue par tissage tridimensionnel comportant au moins une portion longitudinale principale apte à former essentiellement une paroi extrados de pale; les première et deuxième structures fibreuses (41, 42) comportent en outre chacune une première zone de liaison (43), s'étendant le long du bord avant de leur portion longitudinale principale respective (46), solidaire l'une de l'autre et formant une première portion de liaison (43) de la préforme, et une deuxième zone de liaison (44), s'étendant le long du bord arrière de leur portion longitudinale principale respective (46, 47), solidaire l'une de l'autre et formant une deuxième portion de liaison de la préforme (44); les portions longitudinales principales (46, 47) des première et deuxième structures fibreuses (41', 42') sont dissociées de manière à ménager un espace (D2) entre lesdites portions longitudinales principales (46, 47) apte à former un creux de pale.
Abstract:
遮熱コーティング膜の剥離を解消でき、耐久性に優れた遮熱コーティング部材を提供する。 金属基材1上に遮熱コーティング膜2を備える遮熱コーティング部材10であって、遮熱コーティング膜2は金属基材1の表層側から順に、ボンドコート層3とトップコート層4が積層して形成されており、トップコート層4は、主成分であるAl 2 O 3 と、MgO、Co 2 O 3 、Cr 2 O 3 のうちの一種以上の添加物と、からなるセラミックス組成物から形成されている。
Abstract:
A gas turbine engine having an engine casing extending circumferentially about an engine centerline axis; and a compressor section, a combustor section, and a turbine section within said engine casing. At least one of said compressor section and said turbine section includes at least one airfoil and at least one seal member adjacent to the at least one airfoil, wherein a tip of the at least one airfoil is metal having a thin film ceramic coating and the at least one seal member is coated with an abrasive.
Abstract:
The aim of the invention is to improve a turbine blade (10) such that it has a comparatively high wear resistance (e.g. against water droplet erosion) and at the same time a low weight. A section of the turbine blade (10) consists of a fiber composite material (16) having a matrix and fibers embedded therein, said matrix comprising nanoparticles that are distributed in or on said matrix. The turbine blade (10) can e.g. be used as a rotor blade (5) in the final stage (1-2) of a condensing steam turbine (1).
Abstract:
Methods for repairing barrier coatings involving providing a component having a barrier coating including at least one damaged portion, removing the damaged portion of the barrier coating leaving a void, applying a replacement tape cast barrier coating to the void of the component, and sintering the component having the replacement tape cast barrier coating layer.
Abstract:
A ceramic integral vanes impeller which can be used for pumping fluids containing highly erosive and corrosive substances. More particularly the impeller can be used for pumping fluids containing highly erosive and corrosive substances in mining and mineral processing industry.
Abstract:
A turbopump such as a liquid oxygen (LOX) turbopump for a liquid rocket engine is formed using a metal additive manufacturing process in which a single-piece impeller is formed within a single piece housing, the impeller being trapped within the single piece housing. The impeller is formed with an axial bore in which a shaft is inserted after the impeller and housing have been formed. The turbopump includes a protective coating that forms a reaction resistant surface on the base metal in areas of the base metal that are exposed to an oxidizer during pumping. The protective coating may be an enamel glass, a superalloy layer beneath an enamel glass layer, a composite layer of a mixture of enamel glass and superalloy, a composite mixture of oxide and superalloy, or a composite layer of a mixture of enamel glass, superalloy, and oxide.
Abstract:
A fiber preform for a hollow turbine engine vane, the preform comprising a main fiber structure obtained by three-dimensional weaving and including at least one main part (41), wherein the main part (41) extends from a first link strip (44p), includes a first main longitudinal portion (46) suitable for forming essentially a pressure side wall of an airfoil, then includes an U-turn bend portion (45) suitable for forming essentially a leading edge or a trailing edge of the airfoil, then includes a second main longitudinal portion (47) facing the first main longitudinal portion (46) and suitable for forming essentially a suction side wall of the airfoil, and terminating at a second link strip (44q), wherein the first and second link strips (44p, 44q) are secured to each other and form a link portion (44) of the main fiber structure, and wherein the main longitudinal portions (46, 47) are spaced apart so as to form a gap between said main longitudinal portions (46, 47) suitable for forming a hollow in the airfoil.