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.

Analysis of steady stresses in rotating anisotropic discs

Abstract: A full closed-form analysis, based upon the Filonenko-Borodich small displacement technique, for the stress distribution within rotating, constant thickness, annular, anisotropic discs, is given. The solutions obtained are much more general than those arising from the use of the very specific orthotropic condition, which is misleadingly described as anisotropic by many authors. However, in order to test the validity of this technique stress distributions for the orthotropic case (Vθ/Eθ = Vr/Er) have been computed with its aid. These results are compared favourably with those obtained by previous authors, and highlight the influence of the radius ratio, anisotropic constant, and Poisson's ratio upon the stress distribution.

Some combustion aspects of plenum chamber burning

Abstract: Summary A brief explanation is given of the manner in which aircraft performance improvements can be obtained by providing P.C.B. on the high by-pass ratio turbofan engines of subsonic V.T.O.L. aircraft of the Harrier type. The necessity of P.C.B. to supersonic developments is noted. An account is then given of the design considerations behind the choice of the “staggered gutter colander” combustion system for P.C.B., and of the experimental development programme which led, eventually, to the successful demonstration of P.C.B. on an adapted Pegasus engine.

Fuel/oil heat exchange system for a gas turbine engine

Abstract: A fuel/oil heat exchange system is proposed for an aircraft gas turbine engine for heating fuel leaving the aircraft fuel tanks before it enters the engine fuel system. The proposed system eliminates the separate fuel heater. The oil system is designed so that the fuel is not overheated at the hottest engine conditions, and the fuel/oil heat exchange system is made to increase the temperature of the oil if the fuel temperature drops below a pre-determined limit. Referring to FIG. 2 of the drawings, oil from the engine gearbox 16 is passed by scavenge pump 20 to a fuel heating coil 14 in the heat exchanger 12. Fuel from the aircraft passes through the heat exchanger prior to entering the fuel system 7 through fuel filter 6. A temperature sensing device 26 signals a reduction in fuel temperature below a desired level and closes a valve 24 preventing oil passing beneath baffle 25 to the scavenge pump. This causes the oil level to rise until oil spills over the baffle 25, at which level the gears 23 dip into the oil and churn it causing its temperature to increase.