US 12,392,254 B2
Hybrid turbomachine for aircraft with an active acoustic control system
Romain Jean Gilbert Thiriet, Moissy-Cramayel (FR); Eric Jean-Louis Bouty, Moissy-Cramayel (FR); Denis Antoine Julien Real, Moissy-Cramayel (FR); and Valéry Chau, Moissy-Cramayel (FR)
Assigned to SAFRAN HELICOPTER ENGINES, Bordes (FR); SAFRAN ELECTRICAL & POWER, Blagnac (FR); and SAFRAN POWER UNITS, Toulouse (FR)
Appl. No. 18/044,056
Filed by SAFRAN HELICOPTER ENGINES, Bordes (FR); SAFRAN ELECTRICAL & POWER, Blagnac (FR); and SAFRAN POWER UNITS, Toulouse (FR)
PCT Filed Sep. 3, 2021, PCT No. PCT/FR2021/051517
§ 371(c)(1), (2) Date Mar. 3, 2023,
PCT Pub. No. WO2022/049352, PCT Pub. Date Mar. 10, 2022.
Claims priority of application No. 2009010 (FR), filed on Sep. 4, 2020.
Prior Publication US 2023/0258129 A1, Aug. 17, 2023
Int. Cl. F02C 7/045 (2006.01); B64D 27/10 (2006.01); B64D 27/24 (2006.01); B64D 33/02 (2006.01); F01D 15/10 (2006.01); H04R 29/00 (2006.01); B64D 27/02 (2006.01)
CPC F02C 7/045 (2013.01) [B64D 27/10 (2013.01); B64D 27/24 (2013.01); B64D 33/02 (2013.01); F01D 15/10 (2013.01); H04R 29/001 (2013.01); B64D 27/026 (2024.01); B64D 2033/0206 (2013.01); F05D 2260/962 (2013.01); F05D 2270/333 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A hybrid turbomachine comprising an electric generator, a gas generator equipped with an air inlet and with an exhaust and an acoustic monitoring system comprising a control unit, a plurality of microphones and a plurality of loudspeakers configured to emit noise-attenuating acoustic waves;
wherein at least a first microphone of the plurality of microphones is directly connected to the electric generator;
wherein at least a first loudspeaker of the plurality of loudspeakers is positioned proximately to the electric generator, and at least a second loudspeaker of the plurality of loudspeakers is positioned proximately to the air inlet of the gas generator and/or at least a third loudspeaker of the plurality of loudspeakers is positioned proximately to the exhaust of the gas generator;
wherein the control unit of the acoustic monitoring system is mounted on the electric generator and configured to make an AC-DC electrical conversion of an electromotive force of the electric generator into an adjustable DC voltage intended to be distributed to loads or to energy storage means, wherein the control unit of the acoustic monitoring system further comprises a database including noise models generated as a function of operating parameters of the hybrid turbomachine, and a determination module configured to determine, for each loudspeaker of the plurality of loudspeakers, a respective first signal to be emitted, in response to a failure of one of the plurality of the microphones, based on the noise models to the respective loudspeaker as a function of i) the operating parameters of the hybrid turbomachine and ii) the positioning of the respective loudspeaker; and
wherein the acoustic monitoring system attenuates noise generated by the hybrid turbomachine by emitting acoustic waves from the plurality of loudspeakers, wherein the acoustic waves emitted from the plurality of loudspeakers are in phase opposition with acoustic waves received by the plurality of microphones.