The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 1985
Filed:
Jun. 07, 1982
Douglas J Nightingale, Atlanta, GA (US);
Rolls-Royce Inc., New York, NY (US);
Abstract
An ejector nozzle for a turbomachine comprising fixed inner and outer ducts 16,19 to the downstream ends of which is provided mechanism for varying the geometry and area of the nozzle. A plurality of flaps 20, 20(a) which slide in curved tracks 21 are provided to define the throat of the nozzle. An axially movable shroud 25 is provided downstream of the outer duct 19. A plurality of second flaps 23, 23(a) are pivotally attached to the downstream ends of the flaps 20, 20(a) and to the downstream end of the shroud 25. The second flaps 23, 23(a) having openings therein and doors 30 to close the openings 29. Links 31 which are connected to the shroud 25 are used to open and close the doors 30. By sliding the flaps 20, 20(a) in their tracks 21, and translating the shroud axially the geometry of the nozzle can be altered to cater for 'dry', ' reheat' and 'ejector' modes of operation. In the 'ejector' mode the shroud is moved rearwards to uncover air inlets and the links 31 push open the doors of the nozzle throat. The flaps 20, 20(a) can be moved to a thrust reverse position whereby the hot gases flowing through the nozzle can be redirected out of the air inlet openings. A two dimensional nozzle is also disclosed in which the plurality of flaps 20 are replaced by a pair of mutually confronting arcuate flaps 20 and the circumferential array of flaps 23 is replaced by a pair of flaps 23.