Institution
Rolls-Royce Holdings
Company•Derby, United Kingdom•
About: Rolls-Royce Holdings is a company organization based out in Derby, United Kingdom. It is known for research contribution in the topics: Turbine & Gas compressor. The organization has 4027 authors who have published 6305 publications receiving 80517 citations. The organization is also known as: Rolls-Royce Holdings plc.
Topics: Turbine, Gas compressor, Rotor (electric), Turbine blade, Casing
Papers published on a yearly basis
Papers
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12 Feb 1993TL;DR: In this paper, the guide vanes are made variable in camber and each vane comprises a number of spanwise hinged members which can be moved relative one to another to vary the vane camber.
Abstract: Conventionally gas turbine engine compressors have fixed inlet guide vanes to give a predetermined swirl to incoming air at an engine design speed, so that air enters the compressor at an optimum angle. At speeds much lower, for example, than the design speed the guide vane is less efficient. The guide vanes are thereby made variable in camber. Each vane comprises a number of spanwise hinged members which can be moved relative one to another to vary the vane camber.
55 citations
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14 Sep 2000TL;DR: In this paper, a cooling air flow control device for a gas turbine engine is described, consisting of a component, a cooling passage defined within the component and a shaped memory metal valve.
Abstract: A cooling air flow control device for a gas turbine engine, the cooling air flow control device comprising a component, a cooling passage defined within the component and a shaped memory metal valve, the shaped memory metal valve disposed in the cooling passage to regulate, in use, the flow rate of a cooling air flow supplied, in operation, through the cooling passage wherein the shaped memory metal valve operates by changing shape to control the flow rate of the cooling air flow in response to the temperature of the component.
55 citations
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07 Jul 1981TL;DR: In this article, a cooling arrangement for a gas turbine engine's trailing region is described. But this arrangement is restricted to a very small section of the engine, and there is no disturbance of the high speed airflow in this region.
Abstract: A cooled vane or blade for a gas turbine engine has a cooling arrangement for its trailing region which can be accommodated in the relatively thin section available. In this arrangement the trailing region of the hollow interior of the blade is divided off from the remainder by a partition which may be apertured to allow cooling air to enter the compartment thus formed. The concave, pressure flank of the compartment is cooled by arrays of film cooling holes while the convex, suction flank has a perforated plate spaced therefrom to provide impingement cooling. The suction flank is therefore unapertured and there is no disturbance of the high speed airflow in this region. The spent impingement air leaves the aerofoil via a slot and may pass over pedestals en route to cool the entire trailing edge.
55 citations
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15 Jul 2009-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a sequentially coupled thermal and mechanical finite element (FE) model has been developed to describe inertia friction welding (IFW) using the DEFORM 8.2 package.
Abstract: A sequentially coupled thermal and mechanical finite element (FE) model has been developed to describe inertia friction welding (IFW) using the DEFORM 8.2 package. All modelling and experimental work was undertaken on inertia friction welds made from RR1000, which is an advanced high γ′ content nickel-based superalloy. The accuracy of the thermal predictions has been assessed by an analysis of γ′ distribution across the weld region as compared to those recorded during prescribed thermal simulations, while the mechanical model has been validated by comparing predicted and measured upsets and weld pressures. Finally the residual stress predictions have been compared against measurements (by neutron diffraction). In all cases excellent agreement was found between predicted and experimental data. This exercise revealed that the clamping forces applied during the welding process may have a strong influence on the axial stress field. The validated model was then used to study the effect of welding pressure on material flow, thermal history and residual stresses. The work shows that with increasing weld pressure the width of the heat-affected zone (HAZ) is reduced, while the peak temperature and strain rate is increased. In addition the peak stresses in the hoop direction near the weldline were found to be largely unaffected by the weld pressure. However, for lower welding pressures a broader high tensile hoop stress region was found in accordance with the increased HAZ.
54 citations
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TL;DR: In this article, the temporal pulse train modulation during laser percussion drilling was found to effect significant changes to the material ejection processes, and the results showed that the use of linearly increasing SPDPC method increased the downward material removal fractions, from 20% to 28% observed in NDP drilling, to 34% to 39%.
54 citations
Authors
Showing all 4029 results
Name | H-index | Papers | Citations |
---|---|---|---|
David A. Jackson | 136 | 1095 | 68352 |
David Harvey | 115 | 738 | 94678 |
David J. Williams | 107 | 2060 | 62440 |
Michael Walsh | 102 | 963 | 42231 |
Zi-Qiang Zhu | 89 | 1049 | 33963 |
H. K. D. H. Bhadeshia | 77 | 476 | 27588 |
Nigel P. Brandon | 71 | 412 | 18511 |
Sanjib Kumar Panda | 64 | 633 | 13808 |
Fabrizio Scarpa | 63 | 467 | 13559 |
Robert J.K. Wood | 56 | 314 | 10439 |
Howard P. Hodson | 50 | 226 | 7118 |
Martin Rose | 49 | 241 | 10299 |
Andy J. Keane | 46 | 301 | 13753 |
Stephen J. Finney | 45 | 263 | 6821 |
D.M. Vilathgamuwa | 45 | 212 | 7827 |