Rolls-Royce Limited

About: Rolls-Royce Limited is a based out in . It is known for research contribution in the topics: Gas compressor & Rotor (electric). The organization has 624 authors who have published 623 publications receiving 10751 citations. The organization is also known as: Rolls Royce Limited.

Method of electrolytic machining

Abstract: The operation of an electrolytic machine tool is monitored over equal periods of time, so as to detect the number of short circuits, if any, which occur. Where a given number of short circuits are detected in any one time period, a signal is derived from the last of that number and utilised to switch off the electrode traverse motor through power and electrolyte flow are maintained to enable sludge clearance and observation of the resultant reduction in short circuits.

Dispositif d'etancheite pour rotor de turbine a gaz

Abstract: L'invention concerne un dispositif destine a ameliorer l'etancheite entre le rotor et le stator d'une turbine a gaz. Les aubes 22 du rotor sont cerclees d'un bandage 24 comportant un flasque radial 26 formant joint avec le stator 28 et en amont duquel ce stator est perce d'orifices 30 d'alimentation d'air froid creant au voisinage du joint une turbulence s'opposant a la fuite des gaz chauds moteurs par l'entrefer a. Le dispositif ameliore le rendement de la turbine et abaisse la consommation de carburant du moteur.

Gas turbine engine powerplants

Abstract: A ducted fan gas turbine powerplant consists of a core gas generator, which may be a single or two-shaft gas generator, and which drives a fan at the downstream end of the powerplant. The exhaust from the gas generator is mixed with flow in the fan duct and the fan operates on the mixed stream as a working fluid.

Sensing surges in gas turbine engines

Abstract: A pyrometer which senses blade temperature in the engine as also used to detect the onset of an engine surge. The output of the pyrometer 2 (FIG. 1) passes to a level detector unit, comprising a differential amplifier and a constant reference voltage, and which produces an output when the pyrometer signal exceeds the reference voltage. A duration detector comprising a monostable 12, inverter 14, delay line 18 and AND gate 16 determines the duration of the excess level signal and if the duration exceeds a given time, set by the monostable, an output from the duration detector actuates a fuel chopper to minimize the effect of the surge.

Gas turbine engine thrust deflectors

Abstract: The blocker flaps in the fan duct of a gas turbine ducted fan engine are mounted for simultaneous pivoting across the fan duct and movement bodily downstream thereof so as to attain the required throat area for the subsequently reversed flow of fan air through the reverser aperture in the fan cowl.