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.

Process and apparatus for increasing the concentration of alcohol in aqueous solution

Abstract: The process involves the steps of: spraying droplets of an aqueous alcohol input solution through spray-bars into a heat transfer fluid contained within a refrigerated process vessel and allowing the droplets to fall through the heat transfer fluid so that some of the water separates out as ice in the droplets; collecting the droplets as a slurry of ice and concentrated solution at the bottom of the process vessel and subsequently removing the ice to produce a concentrated output solution from the process. The process can be repeated in subsequent process stages up to a limiting concentration of 92% by weight of alcohol in the case of ethanol. The invention includes apparatus in which the process can be performed. Means by which the efficiency of the process may be optimized are also included.

Method for manufacturing bladed members from powder material

Abstract: The invention is concerned with manufacturing gas turbine engine components e.g. guide vanes and blades, in dense silicon nitride starting with silicon nitride in a powder form. Guide vanes are usually in the form of an aerofoil portion and two shroud portions and according to the invention, the aerofoil portion is made in a first mould by hot pressing a mixture of silicon nitride powder and a fluxing agent, such as magnesia. The formed aerofoil is placed in a second mould so that each end extends partly into a space which is to be filled with a further mixture of silicon nitride powder and a fluxing agent. The further mixtures are hot pressed both to form the shroud portions and to amalgamate the shroud portions with the aerofoil portion. Features, such as, flanges and webs can be formed in the shrouds during the moulding process or they can be machined into the shrouds after the vane is removed from the second mould.

Improvements in or relating to gas turbine combustion chambers

Abstract: 943,250. Gas-turbine combustion chambers. ROLLS-ROYCE Ltd. Feb. 1, 1962, No. 3973/62. Heading F1L. A gas turbine combustion chamber comprising a flame tube, fuel supply means and one or more primary and secondary air inlets in the flame tube has an inward annular projection from the flame tube adjacent the downstream edge of at least one secondary air inlet comprising a segmental part projecting from an annular ring, the annular ring being set in the wall of the flame tube and itself projecting into the flame tube. The upstream part of the flame tube is formed from portions 17, 18, 19, 20 having cooling air inlet holes 21, 22, 23. A ring member 24 locates the portion 20 which has a series of angularlyspaced air holes 25. A ring 26 has inwardly projecting segmental parts 27 axially aligned with the holes 25 which encroach on the parts 26, 27 to the extent of half the width of the ring 26 to form channels 28. The ring 26 may be of radial width of between 1/10 and 1/30 and the parts 27 project radially inwards from the ring to a distance of between 1/10 and 1/30 of the external radius of the ring 26. Axial holes 29 and radial holes 31 allow the entry of additional cooling air.

Marine vessel noise attenuating structure

Abstract: The exhaust or the inlet duct of a marine gas turbine engine power plant installation comprises a porous duct, a plurality of circumferentially arranged non-porous channel members attached to and axially spaced along the porous duct, the channel members and the porous duct together defining a plurality of annular noise attenuating cells, and at least one layer of heat insulating material surrounding the channel members, the insulating material being contained with a cover and attached to the porous duct.

Apparatus for deviation borehole drilling

Abstract: A bent-sub, which is a deviation control device, has arcuate stabilizing surfaces on opposite sides of the plane containing the direction of deviation of the borehole, the maximum width between the surfaces being nearly equal to but less than the diameter of the borehole and an arcuate knee contact area, so that when the direction of the deviation is changed by rotating the drill string, the bent-sub is encouraged to slide, rather than roll, around the borehole wall and greater control can be exercised over the direction of deviation.