Accession Number : ADD007862

Title :   Improved Film Cooled Annular Combustor.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Howell,Stephen J

Report Date : 09 Sep 1980

Pagination or Media Count : 21

Abstract : This application discloses a structural improvement to, and a method of improving each cooling nuggest of an annular combustor of a gas turbofan engine, so that the lip portion of each nuggest does not buckle. The structural improvement comprises a plurality of passageways in the defining shell of the combustor, and an unsupported downstream extension of the original length of the prior art lip portion of each nugget to a location which is farther downstream than the most rearwardly (i.e., downstream) positioned passageway of the plurality. The method includes the steps of forming the plurality of passageways, and of extending the lip portion of each nugget downstream, and unsupported, to a position beyond the most rearwardly (i.e., downstream) passageway. The results of the use of the structural improvement, and of the practising of the steps of the improvement method, include: the the promotion of film cooling of the cooling nuggets and of the shell of the combustor; the prevention of buckling of the lip portion of each nugget; and the increase of the useable life span of the combustor.

Descriptors :   *Patent applications, *Film cooling, *Annular burners, *Combustors, Turbofan engines, Experimental design, Shells(Structural forms), Structural properties, Structural members, Life expectancy, Inventions

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE