Injector having low tip temperature

F - Mech Eng,Light,Heat,Weapons – 01 – P

Patent

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Details

F01P 3/16 (2006.01) F23D 14/02 (2006.01) F23D 14/78 (2006.01)

Patent

CA 2157274

Past fuel injection nozzles have attempted to provide a structure to reduce tip temperatures. Such nozzles have failed to attain adequate reduction of tip temperatures without increasing the quantity of cooling air required. The present fuel injector (40) structure has resulted in reduced tip temperatures without increasing the quantity of cooling air required. The structure includes a shell (80) having an inner member (118) positioned therein forming a first chamber (120) therebetween, an end piece (96) forming a second chamber (132) between the inner member (118) and the end piece (96). An inner body (140) has a plurality of first angled passages (174) formed therein and communicates between the second chamber (132) and a passage (116). A flow of combustor air through the second chamber (132) contacts an air side (106) of the end piece (96) resulting in a combustor side (104) being cooled. The unique structure of the fuel injector nozzle (40) provides improved tip cooling without increasing the quality of cooling air and improves the efficiency of the gas turbine engine (10).

Dans les injecteurs de carburant classiques, on a essayé de trouver une structure permettant de réduire la température de la buse. Il a été impossible de parvenir à une réduction adéquate de la température de buse sans augmenter la quantité d'air de refroidissement requise. La structure d'injecteur (40) de carburant de la présente invention permet d'obtenir une réduction de la température de buse sans augmenter la quantité d'air de refroidissement requise. Ladite structure comporte un boîtier (80) possédant un élément interne (118) placé à l'intérieur dudit boîtier et formant une première chambre (120), et une pièce terminale (96) formant une seconde chambre (132) entre l'élément interne (118) et la pièce terminale (96). Un corps interne (140) possède une pluralité de premiers passages (174) angulaires formés à l'intérieur dudit corps et met en communication la seconde chambre (132) et un passage (116). Un flux d'air de combustion traversant la seconde chambre (132) contacte un côté air (106) de la pièce terminale (96), ce qui entraîne le refroidissement du côté combustion (104). La structure unique dudit injecteur (40) de carburant fournit un refroidissement amélioré de la buse sans augmenter la qualité de l'air de refroidissement et améliore l'efficacité de la turbine à gaz (10).

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