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.

Some practical aspects of staged premixed, low emissions combustion

Abstract: An experimental program to research, develop, and demonstrate an axially staged, premixed low emissions combustor is described, with particular emphasis on the many mechanical and thermal problems which were encountered and which seem characteristic of the type. Of these, the risks of autoignition and flashback in the premixing duct were perhaps, the most severe. Their elimination imposed severe constraints on premixing duct geometry and indeed, dictated the layout of the whole combustor. Nevertheless, it proved possible to retain conventional technology to a large extent including the basic combustor structure and mounting arrangements and normal fuel injector accessibility. Large emissions reduction capability was demonstrated to be possible though not within conventional combustor dimensions.

Tank suitable for holding liquids

Abstract: An oil tank suitable for an aircraft mounted gas turbine engine is divided into three series connected chambers. Aerated oil after engine use is fed into the first chamber and de-aerated oil withdrawn from the third chamber for engine use. The chambers are interconnected in such a manner that when the tank is inverted, a reservoir of oil is retained within the third chamber to provide a continued supply of oil to the oil outlet for a finite time period and insufficient oil flows into the first chamber from the second to obstruct an air vent provided in the first chamber.

Sparking circuit for an ignition system for internal combustion engines

Abstract: The invention concerns a sparking circuit for an ignition system for internal combustion engines comprising first and second discharge circuits, the first circuit being operatively associated with said second circuit via delay circuit means, discharge of the first circuit causing said second circuit to discharge after said first circuit but at less than 1 millisecond thereafter.

Combination mold and selector device for casting single crystal objects

Abstract: A selector for use in allowing only one crystal from a directionally-solidified initiating mould cavity to grow into a main casting cavity is described. The selector comprises a ceramic member with a curvilinear groove formed in its surface. The selector is positioned in a two part ceramic shell mould which cooperates with the groove in the selector to form a curvilinear passage which selects the single crystal required.