US 12,247,741 B2
Multitube pilot injector having a split airflow for a gas turbine engine
Bryan Kalb, Jupiter, FL (US); Matthew Yaquinto, Jupiter, FL (US); Gene Chong, Jupiter, FL (US); David E Paredes, Jupiter, FL (US); James Brackett, Palm Beach, FL (US); Gregory Vogel, Palm Beach Gardens, FL (US); Hany Rizkalla, Stuart, FL (US); Bernard Tam Yen Sam, Jupiter, FL (US); Ramesh Keshava-Bhattu, Jupiter, FL (US); Fred Hernandez, Jupiter, FL (US); and Joshua R. Mcnally, Jupiter, FL (US)
Assigned to Power Systems Mfg., LLC, Jupiter, FL (US)
Filed by Power Systems Mfg., LLC, Jupiter, FL (US)
Filed on Nov. 3, 2022, as Appl. No. 17/980,273.
Claims priority of provisional application 63/275,127, filed on Nov. 3, 2021.
Prior Publication US 2023/0135396 A1, May 4, 2023
Int. Cl. F23R 3/00 (2006.01); F02C 7/22 (2006.01); F23R 3/04 (2006.01); F23R 3/20 (2006.01); F23R 3/28 (2006.01); F23R 3/34 (2006.01)
CPC F23R 3/286 (2013.01) [F02C 7/22 (2013.01); F23R 3/045 (2013.01); F23R 3/20 (2013.01); F23R 3/343 (2013.01); F02C 7/222 (2013.01); F23R 3/346 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An injector for a combustor of a gas turbine engine comprising:
a plurality of air/fuel mixing tubes including a radially outer subset of air/fuel mixing tubes and a radially inner subset of air/fuel mixing tubes,
wherein each air/fuel mixing tube of the radially outer subset of air/fuel mixing tubes includes a substantially quadrilateral cross-sectional profile, and
wherein each air/fuel mixing tube of the radially inner subset of air/fuel mixing tubes includes a substantially circular cross-sectional profile;
a first fuel manifold in fluid communication with the radially outer subset of air/fuel mixing tubes;
a second fuel manifold in fluid communication with the radially inner subset of air/fuel mixing tubes; and
a plurality of static air plenums, each static air plenum surrounding a corresponding one of the plurality of air/fuel mixing tubes such that each of the plurality of air/fuel mixing tubes is thermally isolated from a respective fuel manifold via a corresponding static air plenum,
wherein each air/fuel mixing tube of the radially outer subset of air/fuel mixing tubes includes a blocker at an outlet of each air/fuel mixing tube of the radially outer subset of air/fuel mixing tubes,
wherein four neighboring blockers are provided proximate one another to form a substantially circular flame anchoring surface.