US 12,078,353 B2
Aircraft power plant with interburner
Etienne Plamondon, Verdun (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Nov. 24, 2022, as Appl. No. 18/058,755.
Prior Publication US 2024/0175580 A1, May 30, 2024
Int. Cl. F23R 3/16 (2006.01); B64D 27/10 (2006.01); B64D 31/00 (2006.01); B64D 33/02 (2006.01); F02C 3/04 (2006.01)
CPC F23R 3/16 (2013.01) [B64D 27/10 (2013.01); B64D 31/00 (2013.01); B64D 33/02 (2013.01); F02C 3/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operating an aircraft power plant having an interburner fluidly connected between a combustion engine and a turbine, comprising:
operating the combustion engine at an air-fuel ratio corresponding to a nominal air-fuel ratio to generate combustion gases at a nominal temperature;
receiving the combustion gases generated by the combustion engine into the interburner;
increasing a temperature of the combustion gases generated by a combustion chamber of the combustion engine from the nominal temperature to an ignition temperature by lowering the air-fuel ratio to an ignition air-fuel ratio lower than the nominal air-fuel ratio;
injecting a fuel into the interburner and igniting a mixture of the combustion gases and the fuel received into the interburner with the combustion gases being at the ignition temperature; and
after the ignition of the mixture of the combustion gases and the fuel received into the interburner, increasing the air-fuel ratio above the ignition air-fuel ratio.