Global Patent Index - EP 1319896 A2

EP 1319896 A2 2003-06-18 - Gas turbine engine fuel/air premixers with variable geometry exit and method for controlling exit velocities

Title (en)

Gas turbine engine fuel/air premixers with variable geometry exit and method for controlling exit velocities

Title (de)

Kraftstoff/Luft-Vormischeinrichtung mit veränderlicher Geometrie und Methode, die Ausströmgeschwindigkeit zu regeln

Title (fr)

Dispositif de prémélange carburant / air avec géométrie variable et méthode de contrôle de vitesse de sortie

Publication

EP 1319896 A2 (EN)

Application

EP 02027665 A

Priority

US 1441501 A

Abstract (en)

Apparatus (1430) for premixing fuel and air to provide a fuel/air mixture includes a mixing tube (1434) configured for receiving fuel and air, a mixing tube axis (1442), and a mixing tube exit (1454) for discharging a fuel/air mixture. The apparatus further includes a mixture valve (1444) associated with the mixing tube exit (1454) and including inner and outer valve members that define an exit flow area (1402). The defined exit flow area includes at least two segmented, substantially opposed area portions with respect to angular position about the mixing tube axis provided by contours in the outer valve member for directing the mixture flow, and at least one of the inner and outer valve members is movable relative to the other of the valve members to selectively vary the defined exit flow area with respect to time. In a gas turbine gas generator or engine application, a separate controllable combustion air valve can be used with a fuel valve to provide controlled fuel/air ratios for the mixture. <IMAGE>

IPC 1-7 (main, further and additional classification)

F23R 3/28

IPC 8 full level (invention and additional information)

F23R 3/22 (2006.01); F02C 9/20 (2006.01); F23D 11/10 (2006.01); F23D 14/64 (2006.01); F23R 3/28 (2006.01); F23R 3/50 (2006.01)

CPC (invention and additional information)

F23R 3/50 (2013.01); F23D 11/103 (2013.01); F23D 14/64 (2013.01); F23R 3/286 (2013.01)

Citation (applicant)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

EPO simple patent family

EP 1319896 A2 20030618; EP 1319896 A3 20040512; JP 2003194338 A 20030709

INPADOC legal status


2004-09-01 [18W] WITHDRAWN

- Effective date: 20040708

2004-05-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

2004-05-12 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: AL LT LV MK RO

2003-06-18 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

2003-06-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: AL LT LV MK RO