US 12,152,496 B2
Exhaust content
Peter Swann, Derby (GB); David M Beaven, Nottingham (GB); Craig W Bemment, Derby (GB); Alastair G Hobday, Derby (GB); Benjamin J Keeler, Derby (GB); Christopher P Madden, Derby (GB); and Martin K Yates, East Haddon (GB)
Assigned to ROLLS-ROYCE plc, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Apr. 24, 2023, as Appl. No. 18/138,333.
Application 18/138,333 is a continuation of application No. 17/853,405, filed on Jun. 29, 2022, granted, now 11,708,769.
Claims priority of application No. 2118640 (GB), filed on Dec. 21, 2021.
Prior Publication US 2023/0258101 A1, Aug. 17, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F01D 21/00 (2006.01); F02C 9/28 (2006.01)
CPC F01D 21/003 (2013.01) [F02C 9/28 (2013.01); F05D 2220/323 (2013.01); F05D 2260/80 (2013.01); F05D 2270/0831 (2013.01); F05D 2270/708 (2013.01); F05D 2270/804 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of determining one or more fuel characteristics of an aviation fuel suitable for powering a gas turbine engine of an aircraft, the method comprising:
determining, during use of the gas turbine engine, one or more exhaust content parameters by performing a sensor measurement on an exhaust of the gas turbine engine; and
determining one or more fuel characteristics of the fuel based on the one or more exhaust content parameters,
wherein:
the one or more exhaust content parameters include a parameter indicative of a non-volatile particulate matter (nvPM) content of the exhaust; and
the one or more fuel characteristics include any one of more of:
(i) a hydrogen to carbon ratio of the fuel;
(ii) a percentage of sustainable aviation fuel in the fuel;
(iii) an aromatic hydrocarbon content of the fuel;
(iv) a naphthalene content of the fuel; and
(v) a sulphur content of the fuel.