摘要:
The invention relates to a blade (20) for a turbine comprising a blade wall (30, 32), a first channel (36) for guiding a first medium (M1) and a second channel (38) for guiding a second medium (M2) that can be supplied to the turbine blade (20) separately from the first medium (M1). In order to combine both media (M1, M2), which are supplied separately, into one mixture, the turbine blade (20) has least one chamber (40) which is arranged in the interior or in the blade wall (32, 34) and said chamber is connected to said channels (36, 38) via a respective connection line (42, 44). In order to provide a particularly simple component that is eco
摘要:
L'invention concerne un boîtier d'allumage (200) pour turboréacteur, ledit boîtier comprenant : une alimentation électrique (201), une unique voie de commande (202) pour recevoir un signal de commande en provenance d'un calculateur, une voie d'allumage de bougie principale (210) pour exciter au moins une bougie principale d'une chambre de combustion principale, et une voie d'allumage de bougie de postcombustion (220) pour exciter au moins une bougie de postcombustion d'une chambre de postcombustion, ledit boîtier étant apte, en réponse à des commandes impulsionnelles sur ladite unique voie de commande (202), à activer sélectivement la voie d'allumage de bougie principale (210) ou la voie d'allumage de bougie de postcombustion (220).
摘要:
A control system for controlling the operation of a plurality of micro thrusters arranged in a plurality of parallel horizontal rows and a plurality of parallel vertical columns, the control system requires a power source, a first plurality of power lines connected to the power source and coupled to at least one micro thruster of the plurality of micro thrusters in a horizontal row of the plurality of parallel horizontal rows, a second plurality of power lines connected to the power source and coupled to at least one micro thruster of the plurality of micro thrusters in a vertical column of the plurality of parallel vertical columns, and a control unit coupled to the power source to control activation of the first plurality of power lines and activation of the second plurality of power lines.
摘要:
Die Erfindung betrifft eine Turbinenschaufel (10) mit einem profilierten, von einem Arbeitsgas (22) umströmbaren Schaufelblatt (16), welches eine vom Arbeitsgas (22) anströmbare Vorderkante (18) aufweist sowie eine Hinterkante (20), an der das Arbeitsgas (22) abströmbar ist, und mit einem ersten Kanalsystem (30) und mit einem zweiten Kanalsystem (40) zum getrennten Führen zweier unterschiedlichen, der Turbinenschaufel (10) getrennt zuführbaren Medien (M1, M2), wobei das erste Kanalsystem (30) in mindestens einer ersten im Bereich der Hinterkante (20) angeordnete Austrittsöffnung (48) zum Ausblasen des ersten Mediums (M1) in das Arbeitsgas (22) aufweist. Um eine Turbinenschaufel (10) für eine Gasturbine bereitzustellen, bei der eine im Inneren stattfindende Verbrennung zur Erhaltung der Lebensdauer der Turbinenschaufel (10) und zur Vermeidung von Schäden in der Gasturbine sicher vermieden wird, wird vorgeschlagen, dass die mit dem ersten Kanalsystem (30) in Verbindung stehende erste Austrittsöffnungen (48) im Bereich der Hinterkante (20) angeordnet sind und mindestens eine im Bereich der Hinterkante (20) angeordnete, zweite Austrittsöffnung (52) zum Ausblasen des zweiten Mediums (M2) mit dem zweiten Kanalsystem (40) verbunden ist.
摘要:
A turbine engine includes a duct defining an annular passage, at least two heat exchangers arranged within the annular passage and spaced circumferentially apart, a passage between the at least two heat exchangers, and a forward flow control device operable for controlling airflow through the passages.
摘要:
An air breathing reaction propulsion engine has: an open-ended cylindrical combustion chamber having an upstream end and a downstream end, an exhaust propulsion nozzle located at the downstream end of the combustion chamber, and an ejector system located at the upstream end of the combustion chamber. The ejector system comprises an open-ended cylindrical structure having an upstream end through which air is drawn into its interior, and a downstream end in open communication with the combustion chamber. The engine further has a fuel supply system comprising a fuel injector located within the ejector system, a source of pressurised fluid fuel, and a fuel heating coil disposed around the wall of the cylindrical combustion chamber through which the pressurised fluid fuel is supplied to the fuel injector. Under normal running operation, the pressurised fluid fuel is heated in the coil, and the heated fuel is expelled at the fuel injector into the cylindrical structure thereby establishing a pressure differential which draws air into the ejector system to form a combustible fuel/air mixture which is supplied to the combustion chamber. The fuel supply system further comprises a charge-carrying section adapted to carry a charge of a solid fuel which is combusted during start-up operation to produce combustion products that pre-heat the heating coil.
摘要:
Described is a propulsion system (1) for hypersonic aircraft, having an air inlet (10) of a fluid (110), a containment duct (20) and an exhaust nozzle (30). The propulsion system (1) comprises a bypass duct (40) for a flow (100) of fluid (110), an air-breathing engine (22) and a rocket (23) configured for processing respective flows (22a, 23a) of fluid (110). The bypass duct (40), the air-breathing engine (22) and the rocket (23) are operatively associated with each other in such a way as to generate a thermodynamic-fluid interaction in a same portion of space (33) between the respective flows (40a, 22a, 23a) processed in an operating configuration of the propulsion system (1) and wherein the portion of space (33) is inside the containment duct (20).
摘要:
NMSET and related device uses and improvements to the forces generated. Laminar flow control systems benefit from NMSET and related devices as they simplify installation and are easier to retrofit on existing aircraft. Necessary temperature gradients can me generated by using a heated material with the sides at different energy accommodation coefficients. Surface geometries can be used to increase the force generated. Photovoltaic film can be embedded into the membrane, providing a source of energy that can offset the power required for desired thrust. Intake scoops improve the air flow through the micro thrusters and surface geometries, and airflow diffusers increase air flow interaction with the hotter surface resulting in higher thrust outputs.
摘要:
NMSET and related device uses and improvements to the forces generated. Laminar flow control systems benefit from NMSET and related devices as they simplify installation and are easier to retrofit on existing aircraft. Necessary temperature gradients can me generated by using a heated material with the sides at different energy accommodation coefficients. Surface geometries can be used to increase the force generated. Photovoltaic film can be embedded into the membrane, providing a source of energy that can offset the power required for desired thrust. Intake scoops improve the air flow through the micro thrusters and surface geometries, and airflow diffusers increase air flow interaction with the hotter surface resulting in higher thrust outputs.
摘要:
The present invention pertains to the field of machine construction and more precisely relates to combined jet-engine power units for aircraft. This invention essentially comprises increasing the air pressure during take-off or subsonic flight mainly using a fan (2) which is rotated by a two-stroke piston engine (4) operating at a nominal power. The pressurised air in which the fan (2) generated turbulence is further fed into an after-burning chamber (7) where an air-fuel load is burnt. The combustion products are further expanded in a jet nozzle (9) so as to generate the aircraft thrust. The pressure build-up ratio in the inlet device (1) increases together with the flight speed. Once the supersonic flight speed is reached, the power unit is switched from a motor-compressed operation mode to a ramjet-engine operation mode by decreasing the force supplied by the engine (4) to the fan (2) while maintaining the pressure build-up ratio close to one. This system reduces the air resistance to displacement while minimising the power losses upon maintaining the fan (2) rotation. The piston-engine (4) drive is substantially more economical than the gas-turbine drive used on such power units. This piston engine also exhibits good response characteristics over the whole range of its operation modes and allows for instant reaction to any change in the flight mode in that the fan (2) may be restarted in flight. This system may also be used to avoid pumping as well as flame explosion in the after-burning chamber (7) which are typical of ramjets engines. During economical modes such as subsonic-speed air inspection or cruise flights, the power unit is switched to a fan-engine operation mode with a very high bypass ratio by shutting the fuel supply into the after-burning chamber. The method of the present invention may be used to substantially increase the economical features of the aircraft at any flight speed, while increasing flight reliability and safety thanks to the aircraft improved dynamic features.