摘要:
An induction heater is employed with a gas turbine engine (100) in order to heat a static component (22) of the gas turbine engine (100). The heating of the static component (22) is performed such that the clearance space between the static component (22) and a rotating component (24) remains constant during steady state conditions and transient conditions.
摘要:
An annular air inlet duct (302) configured to receive a radially inward flow of air and circumscribing an axis of rotation of a rotatable member of a machine comprising a forward end and an aft end is described. The air inlet duct includes an unheated wall (310) and a heated wall (312) adjacent to a heat source (315). The heated wall includes a plurality of axially-spaced wall panels (320) forming a cavity (326) between each of a pair of adjacent wall panels of the plurality of axially-spaced wall panels.
摘要:
A fluid viscosity system for use in a gas turbine engine includes an induction assembly coupled to a fluid line (204) within the gas turbine engine. The induction assembly includes an electromagnet (206). The induction assembly further includes an electronic oscillator (210) electronically coupled to the electromagnet. The electronic oscillator is configured to generate an alternating current (AC) that is transmitted to the electromagnet at a predetermined frequency and magnitude such that a viscosity of a fluid channeled through the fluid line (206) is reduced at least partially due to induction heating.
摘要:
Aspects of the invention disclosed herein generally provide a heat engine system, a turbopump system, and methods for lubricating a turbopump while generating energy. The systems and methods provide proper lubrication and cooling to turbomachinery components by controlling pressures applied to a thrust bearing in the turbopump. The applied pressure on the thrust bearing may be controlled by a turbopump back-pressure regulator valve adjusted to maintain proper pressures within bearing pockets disposed on two opposing surfaces of the thrust bearing. Pocket pressure ratios, such as a turbine-side pocket pressure ratio (P1) and a pump-side pocket pressure ratio (P2), may be monitored and adjusted by a process control system. In order to prevent damage to the thrust bearing, the systems and methods may utilize advanced control theory of sliding mode, the multi-variables of the pocket pressure ratios P1 and P2, and regulating the bearing fluid to maintain a supercritical state.
摘要:
Lèvre avant de nacelle de turboréacteur comportant des perçages d'air chaud en amont de panneaux acoustiques Lèvre avant de nacelle de turboréacteur, délimitée à l'arrière par une cloison (6), la lèvre comportant un volume annulaire de dégivrage (4) comportant un tube d'alimentation en air chaud (40) pour effectuer un dégivrage de ses parois extérieures, cette lèvre comprenant de plus des panneaux acoustiques (42) disposés sur sa paroi sensiblement tournée radialement vers l'axe de la nacelle, caractérisée en ce qu'elle comporte des perçages de sortie d'air chaud (50) qui sont disposés entre l'extrémité avant de la lèvre, et lesdits panneaux acoustiques (42), qui permettent un débit d'air chaud, depuis ledit volume annulaire, formant un film sensiblement régulier venant recouvrir par une couche limite d'air (52) lesdits panneaux acoustiques afin de les réchauffer.
摘要:
L'invention concerne le domaine des turbomachines, et plus particulièrement une turbomachine (5a) comprenant au moins un compresseur (8), une chambre de combustion (9), une première turbine (10) reliée au compresseur (8) par un premier arbre rotatif (11), un dispositif (13) d'actionnement dudit premier arbre rotatif (11) pour maintenir en rotation la première turbine (10) et le compresseur (8) avec la chambre de combustion (9) éteinte, et un circuit (14) de lubrification de la turbomachine (5a). Ce circuit (14) traverse au moins une source chaude (15,15a-15c) apte à réchauffer un lubrifiant dans ledit circuit (14) de lubrification pendant la rotation de la première turbine (10) et du compresseur (8) avec la chambre de combustion (9) éteinte.
摘要:
A gas turbine engine has a compressor rotor with blades and a disk. A bore is defined radially inwardly of the disk. A combustor includes a burner nozzle. A tap taps air that has been combusted in the combustor section through a valve, and into the bore of the disk. A method is also disclosed.
摘要:
A gas turbine engine including a compressor section, a combustor section, and a turbine section operating to produce a power output during a first mode of operation. A heat retention and distribution system is provided to the engine wherein the heat retention system operates in a second mode of operation, following a shutdown of the engine, to maintain an elevated temperature in components of each of the compressor section, the combustor section and the turbine section in order to effect (1) a reduction in an effective cyclic life consumption of the components and extend a maintenance interval associated with the effective cyclic life consumption, and (2) clearances by maintaining a higher vane carrier temperature with time during a non-power producing mode and more uniform temperature of most stationary components in the circumferential orientation