摘要:
A modular air intake duct system for a vehicle comprising: at least one intake duct (11, 13); and attachment means (17) for attaching said at least one intake duct to at least one structural member of a vehicle (1); wherein said at least one intake duct (11, 13) is adapted to be demountably attached to a load bearing structural member (15) of said vehicle (1), said at least one intake duct (11, 13) itself being adapted to bear substantially no load; and wherein said at least one intake duct (11, 13) is modular, said at least one intake duct comprising at least one module.
摘要:
The invention relates to engine air intakes for aerospace vehicles in which a variable geometry ramp system is employed for matching air intake flow to propulsion engine demand. To alleviate the induced high pressure loads on the ramps and the ramp actuators arising from the air intake flow a reacting pressure is applied to the opposite face of the ramps. The ramp assembly in addition to defining the required air intake duct geometry further defines the adjacent boundary of an enclosure which is pressurised by ram air and vented as required as a function of the load on one of the ramp actuating jacks to give the desired load alleviation.
摘要:
The invention relates to engine air intakes for aerospace vehicles in which a variable geometry ramp system is employed for matching air intake flow to propulsion engine demand. To alleviate the induced high pressure loads on the ramps and the ramp actuators arising from the air intake flow a reacting pressure is applied to the opposite face of the ramps. The ramp assembly in addition to defining the required air intake duct geometry further defines the adjacent boundary of an enclosure which is pressurised by ram air and vented as required as a function of the load on one of the ramp actuating jacks to give the desired load alleviation.
摘要:
Un procédé (2) permet de camoufler contre la détection radar les entrées (1) de réacteurs sur des avions et des dispositifs correspondants. Dans le but de réduire la section globale sur le radar de l'avion tout entier, les ouvertures des entrées (1) de réacteurs sont subdivisées, par des structures appropriées réfléchissant le radar et perméables à l'air, en plusieurs cellules (3) ou canaux présentant de petites ouvertures, lesquelles d'une part, en raison de leurs dimensions, ne permettent pas la pénétration, à l'intérieur de l'entrée (1) du réacteur, des ondes électromagnétiques incidentes (1) mais les réfléchissent comme sur un plan conducteur, et d'autre part opposent au flux d'air une traînée de frottement minimale.
摘要:
A method of producing ducts from composite synthetic material, suitable for use as aircraft air intake ducts, whereby a plaster core, first coated with polyvinyl detaching fluid and then flame-coated with a layer of aluminium, is wound with a synthetic-resin-impregnated yarn followed by a carbon-fibre yarn, and, after being oven-cured, is broken out.
摘要:
A triangular airfoif plate (4) is fixedly supported forward of and below the air intake duct (1) of an aircraft-mounted gas-turbine engine, and a small airfoil member (9) is fixedly supported below the airfoil plate (4). An inductive action of leading-edge separation vortices (5, 10) generated from the leading edges of the airfoil plate (4) and the small airfoil member (9) is utilized to curve the direction of air flowing into the air intake duct (1) and thereby to prevent turbulence in the intake airflow and resulting defective operation or failure of the engine during flight of the aircraft at large angles (a) of attack.