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.

Gas turbine engine combustion chambers

Abstract: In a gas turbine engine having a can annular combustion system, the diffusion passage between the outlet annulus of the engine compressor and the inlets to the individual combustion chambers located in an annular housing, is partially defined by diffusion control housings, one of each of which is integral with the upstream end of a respective one of the combustion chambers. Each diffusion control housing is wedge-like in planform and increases in circumferential width and radial height in the downstream direction. An opening is provided to receive a fuel injector and an air outlet or inlets is located at the upstream end of each housing. The air inlet can be in the form of a single opening at the apex of the housing or in the form of an opening in each flank of the housing.

Stator vane for a gas turbine engine

Abstract: A vane for a gas turbine engine has an aerofoil of unconventional shape. The stacking of sections which defines the aerofoil is arranged to produce an aerofoil whose concave flank is convex in spanwise sections and whose convex flank is concave in spanwise sections. In order to reduce the problems produced by the resulting shape of trailing edge the sections are stacked so that all their trailing edges lie in a plane substantially parallel with the plane of the throat formed between the trailing edge and the next adjacent vane in an array.

Apparatus for producing a fiber reinforced composite material

Abstract: The present invention relates to apparatus for producing a carbon or boron fiber reinforced composite material for use in the manufacture of blades for gas turbine engines. The apparatus consists of a number of aerofoil section formers mounted on a rotatable drum means for winding a continuous fiber or bundle of fibers under tension onto the formers, a source of curable matrix material located adjacent the drum, and means for curing the matrix material.

A Quasi-Three-Dimensional Turbomachinery Blade Design System: Part II—Computerized System

Abstract: The purpose of this work has been to develop a quasi-three-dimensional blade design and analysis system. In Part II of the paper the computerized blade design system is presented and an example given to illustrate its use. The system comprises a streamline curvature throughflow program incorporating the analysis of Part I of this paper, a blade section stacking program, and one of a number of blade-to-blade calculation programs. The information flow between each part of the system is described and the importance of each stage in the calculation indicated. Information is transferred between programs via a data base which enables other design programs, e.g., heat transfer programs, to access the results. This modular approach enables individual design program advances to be made relatively easily. The system is flexible enough to incorporate a number of blade-to-blade programs, the one used depending on the specific application. An example of the flow through a turbine nozzle guide vane is presented. Experimental data are compared with the results from the quasi-three-dimensional system, a fully three-dimensional program and an unlinked two-dimensional system. The results from the quasi-three-dimensional system are very encouraging.

Fluid flow diffuser

Abstract: Fluid flow diffuser has a first divergent duct connected by a sudden enlargement of flow area to a second divergent duct. The enlargement is defined by a fence situated downstream of the downstream end of the first duct. The top of the fence is on a flow perimeter intermediate between the downstream end of the first duct and the upstream end of the second duct, the latter end being defined by the bottom of the fence. An opening defined by the downstream end of the first duct and by the top of the fence gives access to a chamber connected to a pressure less than that at latter downstream end thereby to generate a vortex having a surface bridging the opening and assisting transition of flow from the first duct to the top of the fence. A second vortex formed immediately downstream of the fence assists transition of flow from the top of the fence to the surface of the second duct. The first duct has a rate of divergence low enough to avoid boundary separation. The second duct has a rate of divergence greater than at boundary layer separation would normally occur. The arrangement described avoids boundary layer separation in the second duct and leads overall to a relative reduction in the length of the diffuser for a given rate of diffusion or a relative increase in the rate of diffusion for a given diffuser length.