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.

Blade ingestion prevention

Abstract: The invention provides an apparatus for either preventing an engine component from flying out of an engine or preventing a foreign body from entering an engine and is particularly applicable to each engine of a bank of gas turbine lift engines. The apparatus consists of detecting means which comprises a photoelectric scanner mounted centrally in the intake of a gas turbine engine and a ring of photoelectric cells spaced around the engine intake wall and a guard means which comprises a pair of part spherical gridlike shields having a power source operable by the detecting means to span the intake.

Recent Experience on Centrifugal Compressors for Small Gas Turbines

Abstract: The design philosophy and development of three recent Rolls-Royce centrifugal compressors, ranging in pressure ratio from 3.6 to 7, are described. The main geometrical and aerodynamic details are given, together with overall performance characteristics of the compressors.Copyright © 1978 by ASME

Coherent Photography (Holography) as an Aid to Engineering Design

Abstract: The paper presents information on the technique of holography applied in a routine engineering application. The extension of photography made possibile by the use of coherent laser light, which enables the recording of far more surface information than was hitherto possible has brought new uses of the photographic process in quantitative measurement and metrology. To realize the full value of the new technique a simple arrangement of equipment is required which can be called upon for routine application. A rig is described which has been tailor-made for vibration testing and inspection of aero engine components. A particular feature is that the rig can be used outside the specialized laboratory

Improvements in or relating to the heat treatment carburizing or welding of metals

Abstract: The formation of scale is reduced during the heat treatment of metals, such as ferrous metals, titanium or zirconium or alloys thereof, and nickel base alloys, by coating them with one or more layers of a sprayable mixture of an organophilic cation-modified clay and an organic solvent, such as toluene, xylene, naphtha, white or methylated spirit, benzene, aliphatic hydrocarbons, alcohols, esters or ketones, dipentene, turpentine or mineral oils, with or without a ceramic frit such as powdered glass or ceramics containing zircon or lead, a binder such as a polyester, polyamide, alkyd or silicone resin, dibutyl phthalate or shellac, and/or a filler such as china clay, water ground nepheline syenite or quartz, prior to heating in an atmosphere containing free oxygen at a temperature of at least 600 DEG C. Also, for carburizing ferrous metals using a carburizing atmosphere, e.g. of isopropanol and methane, at a temperature of at least 600 DEG C., the metal surfaces to be protected are coated beforehand with one or more layers of the above mixture. Similarly, the above mixture may be used as a flux for arc-welding ferrous metals (see Division B3). Each layer may be applied by spraying, brushing or dipping, and then drying. The clay is modified by covering the surfaces of the particles with alkyl or aryl radicals coupled to the clay ionically by an onium base as described in Specifications 664,830 and 782,724 and U.S.A. Specification 2,531,440. The bentonite group of clays are suitable for modifying. Examples of the modified clays are dimethyldioctadecyl ammonium montmorillonite or hectorite, and dodecylamine montmorillonite. The metal surfaces to be coated may first be degreased by washing with paraffin and treating with trichlorethylene vapour to remove organic material; paint may be removed with methylene chloride, and heavy scale by abrasive cleaning. After heat treatment any scale may be removed by wet blasting with water or sand blasting followed by immersion in HCl for stainless steel, or by immersion in nitric acid and calcium fluoride bath for titanium and its alloys, e.g. 2% Cu, up to 0.1% C, up to 0.01% H, up to 0.2% Fe, balance Ti. A zirconium alloy is disclosed of composition 1.5% Sn, 0.12% Fe, 0.05% Ni, 0.1% Cr. balance Zr.ALSO:The formation of scale is reduced during the heat treatment of metals, such as ferrous metals, titanium or zirconium or alloys thereof, and nickel base alloys, by coating them with one or more layers of a sprayable mixture of an organophilic cation-modified clay and an organic solvent, such as toluene, xylene, naphtha, white or methylated spirit, benzene, aliphatic hydrocarbons, alcohols, esters or ketones, dipentene, turpentine or mineral oils, with or without a ceramic frit such as powdered glass or ceramics containing zircon or lead, a binder such as a polyester, polyamide, alkyd or silicone resin, dibutyl phthalate or shellac, and/or a filler such as china clay, water ground nepheline syenite or quartz, prior to heating in an atmosphere containing free oxygen at a temperature of at least 600 DEG C. Also, for carburizing ferrous metals using a carburizing atmosphere, e.g. of isopropanol and methane, at a temperature of at least 600 DEG C., the metal surfaces to be protected are coated beforehand with one or more layers of the above mixture. Each layer may be applied by spraying, brushing or dipping, and then drying. The clay is modified by covering the surfaces of the particles with alkyl or aryl radicals coupled to the clay ionically by an onium base as described in Specifications 664,830 and 782,724 and U.S.A. Specification 2,531,440. The bentonite group of clays are suitable for modifying. Examples of the modified clays are dimethyldioctadecyl ammonium montmorillonite or hectorite, and dodecylamine montmorillonite. The metal surfaces to be coated may first be degreased by washing with paraffin and treating with trichlorethylene vapour to remove organic material; paint may be removed with methylene chloride, and heavy scale by abrasive cleaning. After heat treatment any scale may be removed by wet blasting with water or sand blasting followed by immersion in HCl for stainless steel, or by immersion in nitric acid and calcium fluoride bath for titanium and its alloys.