IP Library › Granted Patent US 12,428,992
Granted Patent B2
US 12,428,992 · App. 18/734,131 · Granted Sep 30, 2025

Gas turbine engine

Inventors: Jeffrey Donald Clements (Mason, OH); Daniel Alan Niergarth (Norwood, OH)
Assignee: General Electric Company
F02C7/18F05D2260/232F05D2300/6033
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,428,992
App. No.
18/734,131
Granted
Sep 30, 2025
Kind
B2
Abstract

A gas turbine includes a turbomachine including a compressor section, a combustion section, and a turbine section arranged in serial flow order. The compressor section includes a high pressure compressor defining a high pressure compressor exit area (A HPCExit ). The turbine section includes a low pressure turbine having at least a first stage of turbine rotor blades and a first stage of turbine stator vanes. The gas turbine engine defines a redline exhaust gas temperature (EGT), a total sea level static thrust output (Fn Total ), an airfoil density (ρ) of one or both of the first stage of turbine rotor blades and the first stage of the turbine stator vanes, and a corrected specific thrust.

Claims (42)

1. A gas turbine engine comprising:

a turbomachine comprising a compressor section, a combustion section, and a turbine section arranged in serial flow order, the compressor section including a high pressure compressor defining a high pressure compressor exit area (A HPCExit ), the turbine section including a low pressure turbine having at least a first stage of turbine rotor blades and a first stage of turbine stator vanes;

wherein the gas turbine engine defines a redline exhaust gas temperature (EGT), a total sea level static thrust output (Fn Total ), an airfoil density (ρ) of one or both of the first stage of turbine rotor blades and the first stage of the turbine stator vanes, and a corrected specific thrust;

wherein ρ multiplied be the corrected specific thrust is greater than or equal to 3 and less than or equal to 12; and

wherein the corrected specific thrust is greater than or equal to 42 and less than or equal to 90 and is determined as follows:

F

⁢

n

Total

×

EGT

/

(

A

HPCExit

2

×

1000

)

.

2. The gas turbine engine of claim 1 , wherein one or both of the first stage of the turbine rotor blades and the first stage of the turbine stator vanes comprise a ceramic-matrix-composite.

3. The gas turbine engine of claim 2 , wherein ρ multiplied be the corrected specific thrust is greater than or equal to 4.2 and less than or equal to 9.

4. The gas turbine engine of claim 2 , wherein ρ is greater than or equal to 0.05 pound-mass per inches cubed and less than or equal to 0.15 pound-mass per inches cubed.

5. The gas turbine engine of claim 1 , wherein the EGT is greater than or equal to 1100 degrees Celsius.

6. The gas turbine engine of claim 1 , wherein the corrected specific thrust is greater than or equal to 45 and less than or equal to 90.

7. The gas turbine engine of claim 1 , wherein the EGT is greater than 1000 degrees Celsius and less than 1300 degrees Celsius.

8. The gas turbine engine of claim 1 , wherein the EGT is greater than 1100 degree Celsius and less than 1250 degrees Celsius.

9. The gas turbine engine of claim 1 , wherein the EGT is greater than 1150 degree Celsius and less than 1250 degrees Celsius.

10. The gas turbine engine of claim 1 , wherein the EGT is greater than 1000 degree Celsius and less than 1300 degrees Celsius, and wherein the corrected specific thrust is greater than or equal to 45 and less than or equal to 80.

11. The gas turbine engine of claim 1 , wherein the EGT is greater than 1000 degree Celsius and less than 1300 degrees Celsius, and wherein the corrected specific thrust is greater than or equal to 50 and less than or equal to 80.

12. The gas turbine engine of claim 1 , wherein the turbine section comprises a high pressure turbine having a first stage of high pressure turbine rotor blades, and wherein the gas turbine engine further comprises:

a cooled cooling air system in fluid communication with the first stage of high pressure turbine rotor blades.

13. The gas turbine engine of claim 12 , wherein the cooled cooling air system is further in fluid communication with the high pressure compressor for receiving an airflow from the high pressure compressor.

14. The gas turbine engine of claim 13 , wherein the cooled cooling air system further comprises a heat exchanger in thermal communication with the airflow for cooling the airflow.

15. The gas turbine engine of claim 12 , wherein when the gas turbine engine is operated at a takeoff power level, the cooled cooling air system is configured to provide a temperature reduction of a cooling airflow equal to at least 15% of the EGT and up to 45% of the EGT.

16. The gas turbine engine of claim 12 , wherein when the gas turbine engine is operated at a takeoff power level, the cooled cooling air system is configured to receive between 2.5% and 35% of an airflow through a working gas flow path of the turbomachine at an inlet to a compressor of the compressor section.

17. The gas turbine engine of claim 1 , further comprising a primary fan driven by the turbomachine.

18. The gas turbine engine of claim 17 , further comprising:

an inlet duct downstream of the primary fan and upstream of the compressor section of the turbomachine; and

a secondary fan located within the inlet duct.

19. The gas turbine engine of claim 18 , wherein the gas turbine engine defines a bypass passage radially outward of the turbomachine, and wherein the gas turbine engine defines a third stream extending from a location downstream of the secondary fan to the bypass passage.

20. The gas turbine engine of claim 18 , wherein the secondary fan is a single stage secondary fan.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 5, 2024
From: CLEMENTS, JEFFREY DONALD; NIERGATH, DANIEL ALAN
To: GENERAL ELECTRIC COMPANY
Reel/Frame 067626/0377 →
Continuity (2)
Continuation In Part 17978629 · Nov 1, 2022
Related Publication 20240328357A1 · Oct 3, 2024
References Cited (256)
US 2264297A · Clay · 1941 [cited by applicant]
US 2623721A · Harrington · 1952 [cited by applicant]
US 3420055A · Lavash · 1969 [cited by applicant]
US 3528250A · Johnson · 1970 [cited by applicant]
US 3628885A · Sidenstick · 1971 [cited by applicant]
US 3651645A · Grieb · 1972 [cited by applicant]
US 3779007A · Lavash · 1973 [cited by applicant]
US 4012012A · Ligler · 1977 [cited by applicant]
US 4064692A · Johnson et al. · 1977 [cited by applicant]
US 4078604A · Christl et al. · 1978 [cited by applicant]
US 4078761A · Thompson · 1978 [cited by applicant]
US 4120150A · Wakeman · 1978 [cited by applicant]
US 4137705A · Andersen et al. · 1979 [cited by applicant]
US 4254618A · Elovic · 1981 [cited by applicant]
US 4263786A · Eng · 1981 [cited by applicant]
US 4546605A · Mortimer et al. · 1985 [cited by applicant]
US 4696156A · Burr et al. · 1987 [cited by applicant]
US 4741152A · Burr et al. · 1988 [cited by applicant]
US 4773212A · Griffin et al. · 1988 [cited by applicant]
US 4776536A · Hudson et al. · 1988 [cited by applicant]
US 4966005A · Cowell et al. · 1990 [cited by applicant]
US 5024580A · Olive · 1991 [cited by applicant]
US 5121598A · Butler · 1992 [cited by applicant]
US 5152146A · Butler · 1992 [cited by applicant]
US 5177951A · Butler · 1993 [cited by applicant]
US 5203163A · Parsons · 1993 [cited by applicant]
US 5241814A · Butler · 1993 [cited by applicant]
US 5255505A · Cloyd et al. · 1993 [cited by applicant]
US 5256340A · Allison et al. · 1993 [cited by applicant]
US 5261227A · Giffin, III · 1993 [cited by applicant]
US 5296308A · Caccavale et al. · 1994 [cited by applicant]
US 5297386A · Kervistin · 1994 [cited by applicant]
US 5305616A · Coffinberry · 1994 [cited by applicant]
US 5317877A · Stuart · 1994 [cited by applicant]
US 5370499A · Lee · 1994 [cited by applicant]
US 5387380A · Cima et al. · 1995 [cited by applicant]
US 5392614A · Coffinberry · 1995 [cited by applicant]
US 5402638A · Johnson · 1995 [cited by applicant]
US 5414992A · Glickstein · 1995 [cited by applicant]
US 5511374A · Glickstein et al. · 1996 [cited by applicant]
US 5544700A · Shagoury · 1996 [cited by applicant]
US 5545003A · O'Connor et al. · 1996 [cited by applicant]
US 5553449A · Rodgers et al. · 1996 [cited by applicant]
US 5558303A · Koethe et al. · 1996 [cited by applicant]
US 5615547A · Beutin et al. · 1997 [cited by applicant]
US 5619855A · Burrus · 1997 [cited by applicant]
US 5680767A · Lee et al. · 1997 [cited by applicant]
US 5724816A · Ritter et al. · 1998 [cited by applicant]
US 5782076A · Huber et al. · 1998 [cited by applicant]
US 5802841A · Maeda · 1998 [cited by applicant]
US 5819525A · Gaul et al. · 1998 [cited by applicant]
US 5853044A · Wheaton et al. · 1998 [cited by applicant]
US 5918458A · Coffinberry et al. · 1999 [cited by applicant]
US 6106229A · Nikkanen et al. · 2000 [cited by applicant]
US 6117612A · Halloran et al. · 2000 [cited by applicant]
US 6182435B1 · Niggemann et al. · 2001 [cited by applicant]
US 6182458B1 · Franklin, Jr. · 2001 [cited by applicant]
US 6253554B1 · Kobayashi et al. · 2001 [cited by applicant]
US 6302191B1 · Wickham et al. · 2001 [cited by applicant]
US 6347660B1 · Sikkenga et al. · 2002 [cited by applicant]
US 6415595B1 · Wilmot, Jr. et al. · 2002 [cited by applicant]
US 6578362B1 · Coffinberry · 2003 [cited by applicant]
US 6584778B1 · Griffiths et al. · 2003 [cited by applicant]
US 6595749B2 · Lee et al. · 2003 [cited by applicant]
US 6805535B2 · Tiemann · 2004 [cited by applicant]
US 6913064B2 · Beals et al. · 2005 [cited by applicant]
US 6990797B2 · Venkataramani et al. · 2006 [cited by applicant]
US 6993913B2 · Kobayashi et al. · 2006 [cited by applicant]
US 7000404B2 · Palmisano et al. · 2006 [cited by applicant]
US 7140174B2 · Johnson · 2006 [cited by applicant]
US 7143581B2 · Kobayashi et al. · 2006 [cited by applicant]
US 7188464B2 · Ackerman et al. · 2007 [cited by applicant]
US 7216475B2 · Johnson · 2007 [cited by applicant]
US 7231769B2 · Spadaccini et al. · 2007 [cited by applicant]
US 7260926B2 · Sabatino et al. · 2007 [cited by applicant]
US 7306026B2 · Memmen · 2007 [cited by applicant]
US 7395657B2 · Johnson · 2008 [cited by applicant]
US 7448433B2 · Ortiz et al. · 2008 [cited by applicant]
US 7452202B2 · Gram · 2008 [cited by applicant]
US 7481214B2 · Eilers · 2009 [cited by applicant]
US 7527475B1 · Liang · 2009 [cited by applicant]
US 7533713B2 · Pfeifer et al. · 2009 [cited by applicant]
US 7608131B2 · Jensen · 2009 [cited by applicant]
US 7610946B2 · Morris et al. · 2009 [cited by applicant]
US 7624592B2 · Lui et al. · 2009 [cited by applicant]
US 7716913B2 · Rolt · 2010 [cited by applicant]
US 7717676B2 · Cunha et al. · 2010 [cited by applicant]
US 7753104B2 · Luczak et al. · 2010 [cited by applicant]
US 7770381B2 · Johnson et al. · 2010 [cited by applicant]
US 7836680B2 · Schwarz et al. · 2010 [cited by applicant]
US 7926289B2 · Lee et al. · 2011 [cited by applicant]
US 8015788B2 · Stephenson et al. · 2011 [cited by applicant]
US 8056345B2 · Norris et al. · 2011 [cited by applicant]
US 8066052B2 · Blair · 2011 [cited by applicant]
US 8307662B2 · Turco · 2012 [cited by applicant]
US 8506836B2 · Szuromi et al. · 2013 [cited by applicant]
US 8641807B2 · Thomas · 2014 [cited by applicant]
US 8747055B2 · McCune et al. · 2014 [cited by applicant]
US 8789376B2 · Coffinberry · 2014 [cited by applicant]
US 8851151B2 · Frasier et al. · 2014 [cited by applicant]
US 8943827B2 · Prociw et al. · 2015 [cited by applicant]
US 8955330B2 · Narcus et al. · 2015 [cited by applicant]
US 8961114B2 · Ruthemeyer · 2015 [cited by applicant]
US 8985540B1 · Slesinski · 2015 [cited by applicant]
US 9039382B2 · Stapleton · 2015 [cited by applicant]
US 9079357B2 · Ebert et al. · 2015 [cited by applicant]
US 9200855B2 · Kington et al. · 2015 [cited by applicant]
US 9410482B2 · Krautheim et al. · 2016 [cited by applicant]
US 9422063B2 · Diaz · 2016 [cited by applicant]
US 9429072B2 · Diaz et al. · 2016 [cited by applicant]
US 9458764B2 · Alecu et al. · 2016 [cited by applicant]
US 9650147B2 · Selechert et al. · 2017 [cited by applicant]
US 9677501B2 · Pierluissi et al. · 2017 [cited by applicant]
US 9835035B2 · Mueller et al. · 2017 [cited by applicant]
US 9845768B2 · Pesyna et al. · 2017 [cited by applicant]
US 9920710B2 · Dawson et al. · 2018 [cited by applicant]
US 9995314B2 · Miller et al. · 2018 [cited by applicant]
US 10022790B2 · Lee et al. · 2018 [cited by applicant]
US 10100736B2 · Niergarth et al. · 2018 [cited by applicant]
US 10260419B2 · Cerny et al. · 2019 [cited by applicant]
US 10280486B2 · Zhang et al. · 2019 [cited by applicant]
US 10352243B2 · Mizukami et al. · 2019 [cited by applicant]
US 10399270B2 · Xu et al. · 2019 [cited by applicant]
US 10578028B2 · Becker, Jr. · 2020 [cited by applicant]
US 10654579B2 · Diaz · 2020 [cited by applicant]
US 20010024000A1 · Lee et al. · 2001 [cited by applicant]
US 20050109016A1 · Ullyott · 2005 [cited by applicant]
US 20050205232A1 · Wang et al. · 2005 [cited by applicant]
US 20080006384A1 · Memmen · 2008 [cited by applicant]
US 20080080979A1 · Brassfield et al. · 2008 [cited by applicant]
US 20080110603A1 · Fellague et al. · 2008 [cited by applicant]
US 20080135722A1 · Wang et al. · 2008 [cited by applicant]
US 20080190093A1 · Gauthier et al. · 2008 [cited by applicant]
US 20080310955A1 · Norris et al. · 2008 [cited by applicant]
US 20080314573A1 · Schwarz et al. · 2008 [cited by applicant]
US 20090060714A1 · Moors · 2009 [cited by applicant]
US 20090175718A1 · Diaz et al. · 2009 [cited by applicant]
US 20090188234A1 · Suciu et al. · 2009 [cited by applicant]
US 20090211273A1 · Klewer · 2009 [cited by applicant]
US 20090229812A1 · Pineo et al. · 2009 [cited by applicant]
US 20100003619A1 · Das et al. · 2010 [cited by applicant]
US 20100025001A1 · Lee et al. · 2010 [cited by applicant]
US 20100028645A1 · Maguire et al. · 2010 [cited by applicant]
US 20100068464A1 · Meyer · 2010 [cited by applicant]
US 20100068465A1 · Su et al. · 2010 [cited by applicant]
US 20100107603A1 · Smith · 2010 [cited by applicant]
US 20100139288A1 · Rago · 2010 [cited by applicant]
US 20100170262A1 · Kaslusky et al. · 2010 [cited by applicant]
US 20100192593A1 · Brown et al. · 2010 [cited by applicant]
US 20100212857A1 · Bulin et al. · 2010 [cited by applicant]
US 20110079683A1 · Stolte et al. · 2011 [cited by applicant]
US 20110088405A1 · Turco · 2011 [cited by applicant]
US 20110132562A1 · Merrill et al. · 2011 [cited by applicant]
US 20110132563A1 · Merrill et al. · 2011 [cited by applicant]
US 20110150634A1 · Bajusz et al. · 2011 [cited by applicant]
US 20110162387A1 · Chir et al. · 2011 [cited by applicant]
US 20110302928A1 · Mudawar · 2011 [cited by applicant]
US 20110310370A1 · Rohner et al. · 2011 [cited by applicant]
US 20110314835A1 · Liu · 2011 [cited by applicant]
US 20120067055A1 · Held · 2012 [cited by applicant]
US 20120174583A1 · Lehar · 2012 [cited by applicant]
US 20120192578A1 · Finney · 2012 [cited by applicant]
US 20120243970A1 · Hellgren et al. · 2012 [cited by applicant]
US 20120248657A1 · Ebert et al. · 2012 [cited by applicant]
US 20120297789A1 · Coffinberry · 2012 [cited by applicant]
US 20130104564A1 · Arar · 2013 [cited by applicant]
US 20130186100A1 · Rhoden et al. · 2013 [cited by applicant]
US 20130195658A1 · Saito et al. · 2013 [cited by applicant]
US 20130224423A1 · Mikulak et al. · 2013 [cited by applicant]
US 20130247587A1 · Lo · 2013 [cited by applicant]
US 20130333855A1 · Merrill et al. · 2013 [cited by applicant]
US 20140079540A1 · Morris et al. · 2014 [cited by applicant]
US 20140182264A1 · Weisgerber et al. · 2014 [cited by applicant]
US 20140230444A1 · Hao et al. · 2014 [cited by applicant]
US 20140271129A1 · Mueller et al. · 2014 [cited by applicant]
US 20140352315A1 · Diaz · 2014 [cited by applicant]
US 20140352562A1 · Raymond, Jr. · 2014 [cited by applicant]
US 20150000291A1 · Smith et al. · 2015 [cited by applicant]
US 20150037601A1 · Blackmore · 2015 [cited by applicant]
US 20150048209A1 · Hoyt et al. · 2015 [cited by applicant]
US 20150064015A1 · Perez · 2015 [cited by applicant]
US 20150068629A1 · Kottilingam et al. · 2015 [cited by applicant]
US 20150076739A1 · Batchelder · 2015 [cited by applicant]
US 20150090070A1 · Etter et al. · 2015 [cited by applicant]
US 20150100607A1 · Kobashi et al. · 2015 [cited by applicant]
US 20150114611A1 · Morris et al. · 2015 [cited by applicant]
US 20150202683A1 · Bunker · 2015 [cited by applicant]
US 20150209910A1 · Denney et al. · 2015 [cited by applicant]
US 20150306657A1 · Frank · 2015 [cited by applicant]
US 20150321249A1 · Shah et al. · 2015 [cited by applicant]
US 20150321250A1 · Xu · 2015 [cited by applicant]
US 20150337730A1 · Kupiszewski et al. · 2015 [cited by applicant]
US 20150354465A1 · Suciu et al. · 2015 [cited by applicant]
US 20160038866A1 · Gibson et al. · 2016 [cited by applicant]
US 20160059302A1 · McBrien et al. · 2016 [cited by applicant]
US 20160108814A1 · Schmitz · 2016 [cited by applicant]
US 20160221262A1 · Das et al. · 2016 [cited by applicant]
US 20160298550A1 · Kupratis et al. · 2016 [cited by applicant]
US 20160326963A1 · Yamazaki · 2016 [cited by applicant]
US 20160341126A1 · Kupratis et al. · 2016 [cited by applicant]
US 20170030266A1 · Cerny et al. · 2017 [cited by applicant]
US 20170044984A1 · Pesyna et al. · 2017 [cited by applicant]
US 20170087630A1 · Lee et al. · 2017 [cited by applicant]
US 20170114721A1 · Miller et al. · 2017 [cited by applicant]
US 20170159563A1 · Sennoun · 2017 [cited by applicant]
US 20170159566A1 · Sennoun et al. · 2017 [cited by applicant]
US 20170167382A1 · Miller et al. · 2017 [cited by applicant]
US 20170184027A1 · Moniz et al. · 2017 [cited by applicant]
US 20170260905A1 · Schmitz · 2017 [cited by applicant]
US 20180029944A1 · Subramanian et al. · 2018 [cited by applicant]
US 20180161852A1 · McCarren et al. · 2018 [cited by applicant]
US 20180161853A1 · Deines et al. · 2018 [cited by applicant]
US 20180161854A1 · Deines et al. · 2018 [cited by applicant]
US 20180161855A1 · Deines et al. · 2018 [cited by applicant]
US 20180161856A1 · Yang et al. · 2018 [cited by applicant]
US 20180161857A1 · Garay et al. · 2018 [cited by applicant]
US 20180161858A1 · Garay et al. · 2018 [cited by applicant]
US 20180161859A1 · Garay et al. · 2018 [cited by applicant]
US 20180161866A1 · Deines et al. · 2018 [cited by applicant]
US 20190218971A1 · Niergarth et al. · 2019 [cited by applicant]
US 20190359340A1 · Pachidis et al. · 2019 [cited by applicant]
US 20210199013A1 · Read et al. · 2021 [cited by applicant]
US 20220288673A1 · Deines et al. · 2022 [cited by applicant]
CN 1603596A · 2005 [cited by applicant]
CN 101576024A · 2009 [cited by applicant]
CN 102078924A · 2011 [cited by applicant]
CN 202291247U · 2012 [cited by applicant]
CN 102802834A · 2012 [cited by applicant]
CN 103008558A · 2013 [cited by applicant]
CN 203441604U · 2014 [cited by applicant]
CN 105579688A · 2016 [cited by applicant]
CN 107035528A · 2017 [cited by applicant]
DE 102009039255A1 · 2011 [cited by applicant]
EP 2359959A1 · 2011 [cited by applicant]
EP 2359962A2 · 2011 [cited by applicant]
EP 2992982A1 · 2016 [cited by applicant]
EP 3514349A1 · 2019 [cited by applicant]
GB 2034822A · 1980 [cited by applicant]
JP H07208200A · 1995 [cited by applicant]
JP 2013512783A · 2013 [cited by applicant]
JP 2014208373A · 2014 [cited by applicant]
JP 2016501139A · 2016 [cited by applicant]
JP 2015516591A · 2016 [cited by applicant]
JP 2016533905A · 2016 [cited by applicant]
WO WO9703281A1 · 1997 [cited by applicant]
WO WO032331A1 · 2000 [cited by applicant]
WO WO0051761A1 · 2000 [cited by applicant]
WO WO2015021168A1 · 2015 [cited by applicant]
WO WO2015026535A1 · 2015 [cited by applicant]
WO WO2015053846A2 · 2015 [cited by applicant]
WO WO2015112885A1 · 2015 [cited by applicant]
BAE, Integrally Cored Ceramic Investment Casting Mold Fabricated by Ceramic Stereolithography, Chapter 5, A Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy, Mater… [cited by applicant]
Krithivasan, Detection of Propagation of Over-Heat Sections in Supply Air Duct of Aircrafts, Honeywell Technology Solutions Lab Pvt Ltd., Dec. 6, 2011, pp. 1-6. [cited by applicant]
Kumar et al., 30 Printing of Hollow Compounds, IJRET: International Journal of Research in Engineering and Technology, vol. 4, Issue 12, 2015, pp. 18-21. [cited by applicant]
MIKRO Systems, Advanced Filtration to Improve Single Crystal Casting Yield, National Energy Technology Laboratory, Aug. 2013, pp. 1-4. [cited by applicant]
Rame et al., Development of AGAT, a Third-Generation Nickel-Based Superalloy for Single Crystal Turbine Blade Applications, The Minerals, Metals & Materials Society, Superalloys 2020, pp. 31-40. [cited by applicant]