摘要:
A centrifugal fan includes a plurality of fan blades (21) arranged spaced apart from each other in a circumferential direction. The fan blade (21) has an inner edge portion (26) disposed on an inner peripheral side and an outer edge portion (27) disposed on an outer peripheral side. The fan blade (21) has a blade surface including a pressure surface and a suction surface. When cut along a plane orthogonal to a rotation axis of the fan, the fan blade (21) has a blade cross section having concave portions formed at the pressure surface and the suction surface. A plurality of fan blades (21) include fan blades (21A to 21E) having blade cross sections of different shapes. With such a configuration, the fan has an excellent air-blowing capacity while preventing noise. A molding die for use in production of the fan and a fluid feeder including the fan are also provided.
摘要:
An exhaust mixer (32) for a gas turbine engine (10) has a lobe cross-over offset (O). The proposed geometric feature leads to improved exhaust performance and potential weight reduction.
摘要:
An airfoil for a turbine engine includes pressure and suction sides that extend in a radial direction from a 0% span position at an inner flow path location to a 100% span position at an airfoil tip. The airfoil has a relationship between a total chord length and a span position and corresponds to a curve that has an increasing total chord length from the 0% span position to a first peak. The first peak occurs in the range of 45-65% span position, and the curve either remains generally constant or has a decreasing total chord length from the first peak to the 100% span position. The total chord length is at the 0% span position in the range of 8.2-10.5 inches (20.8-26.7 cm).
摘要:
An airfoil for a turbine engine includes pressure and suction sides that extend in a radial direction from a 0% span position at an inner flow path location to a 100% span position at an airfoil tip. The airfoil has a relationship between a tangential leading edge location and a span position that corresponds to a curve that is at least a third order polynomial with a generally S-shaped curve that has an initial negative slope followed by a positive slope and then a second negative slope. The positive slope leans toward the suction side and the negative slopes lean toward the pressure side.
摘要:
Die Erfindung bezieht sich auf eine Triebwerksverkleidung eines Fluggasturbinentriebwerks mit einer Schubumkehrvorrichtung, mit einem Kerntriebwerk 10 und einem dieses umgebenden Nebenstromkanal 31, sowie mit einer den Nebenstromkanal 31 umschließenden vorderen Verkleidung 29 und einer in Axialrichtung verschiebbaren hinteren Verkleidung 30, sowie mit um den Umfang angeordneten Kaskadenelementen 32, welche in einen sich bei einer Verschiebung der hinteren Verkleidung 30 zu der vorderen Verkleidung 29 ergebenden Zwischenraum durch eine im Wesentlichen axiale Verschiebung einbringbar sind, wobei die Kaskadenelemente 32 direkt mit der hinteren Verkleidung 30 verbunden sind, dass die hintere Verkleidung 30 eine gerundete äussere Vorderkante 33 aufweist und dass das Kaskadenelement 32 an seinem hinteren Bereich ein Strömungsleitelement 34 aufweist, vor welchem mehrere Schubumkehrleitschaufeln 35 angeordnet sind und hinter welchem zumindest eine Strömungsleitschaufel 36 angeordnet ist, deren Wölbungsform der Rundung der äusseren Vorderkante 33 der hinteren Verkleidung 30 gleicht.
摘要:
In a variable geometry turbocharger including a variable nozzle mechanism, an object is to enhance safety upon malfunction of the variable nozzle mechanism as well as to improve accuracy in the control of the variable nozzle mechanism by applying a moment that acts on the nozzle vanes in an opening direction securely and stably. A variable geometry turbocharger includes a plurality of nozzle vanes 41a disposed at predetermined intervals around a rotational shaft center of a turbine wheel 7 so as to surround an outer circumferential side of the turbine wheel 7 and a variable nozzle mechanism configured capable of changing a blade angle of each of the nozzle vanes 41a, each of the nozzle vanes 41a having a blade cross-section orthogonal to a nozzle shaft 41b of each nozzle vane 41a, the blade cross-section having: a concave portion 53 curved into a concave shape on at least a part of a pressure surface 45 side, the part being disposed at a trailing edge 51 side with respect to the rotational center C; and a convex portion at a leading edge 49 side with respect to the rotational center C, so that a surface shape of the pressure surface 45 side is a substantially S-shape having the concave portion and the convex portion across a boundary at a same longitudinal position as the rotational center.
摘要:
One embodiment of the present invention is a unique flight vehicle. Another embodiment is a unique propulsion system. Another embodiment is a unique thrust vectoring system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for flight vehicles, propulsion systems and thrust vectoring systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.
摘要:
A rocket nozzle (8) includes a dual-bell nozzle (10) and a gas introducing section (40A, 40B, 40C, 40D) configured to introduce gas into space (80) surrounded by the dual-bell nozzle. Combustion gas flows in the space. The dual-bell nozzle includes a first stage nozzle (20) bell-shaped and surrounding an upstream portion (81) of the space, and a second stage nozzle (30) bell-shaped and surrounding a downstream portion (82) of the space. The dual-bell nozzle has an inflection point (12) between the first stage nozzle and the second stage nozzle. The gas introducing section includes a gas inlet (45, 63) provided to an inner wall surface of the first stage nozzle. The gas is introduced into the space from the gas inlet.