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1. WO2020221976 - INTEGRATION OF A FAN FLUTTER DAMPER IN AN ENGINE CASING

Publication Number WO/2020/221976
Publication Date 05.11.2020
International Application No. PCT/FR2020/050698
International Filing Date 23.04.2020
IPC
F02C 7/045 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
7Features, component parts, details or accessories, not provided for in, or of interest apart from, groups F02C1/-F02C6/158; Air intakes for jet-propulsion plants
04Air intakes for gas-turbine plants or jet-propulsion plants
045having provisions for noise suppression
F02K 1/34 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
KJET-PROPULSION PLANTS
1Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
28using fluid jets to influence the jet flow
34for attenuating noise
F02K 1/82 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
KJET-PROPULSION PLANTS
1Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
78Other construction of jet pipes
82Jet pipe walls, e.g. liners
CPC
B64D 33/06
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
33Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
04of exhaust outlets or jet pipes
06Silencing exhaust or propulsion jets
F02C 7/045
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
7Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
04Air intakes for gas-turbine plants or jet-propulsion plants
045having provisions for noise suppression
F02K 1/827
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
KJET-PROPULSION PLANTS
1Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
78Other construction of jet pipes
82Jet pipe walls, e.g. liners
827Sound absorbing structures or liners
F05D 2220/36
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
2220Application
30in turbines
36specially adapted for the fan of turbofan engines
F05D 2250/283
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
2250Geometry
20Three-dimensional
28patterned
283honeycomb
F05D 2260/963
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
2260Function
96Preventing, counteracting or reducing vibration or noise
963by Helmholtz resonators
Applicants
  • SAFRAN AIRCRAFT ENGINES [FR]/[FR]
Inventors
  • RIOU, Georges, Jean, Xavier
  • MARDJONO, Jacky, Novi
  • DAON, Renaud, Yannick, Fabien
  • DE CACQUERAY-VALMENIER, Nicolas, Pierre, Alain, Edme
Agents
  • HEALY, Erwan
  • DESORMIERE, Pierre-Louis
  • DAVID, Alain
  • LAIK, Eric
Priority Data
190457830.04.2019FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) INTEGRATION OF A FAN FLUTTER DAMPER IN AN ENGINE CASING
(FR) INTEGRATION D'UN AMORTISSEUR DE FLOTTEMENT FAN DANS UN CARTER MOTEUR
Abstract
(EN)
Acoustic treatment panel (10) intended to be disposed on at least one wall of a jet engine (1) in contact with a fluidic flow, the panel (10) comprising a first sheet (16), a second sheet (14) that is parallel to the first sheet (16) and has a first face (141) intended to be in contact with a fluidic flow and a second face (142) facing the first sheet (16), and acoustic treatment cells (18) that extend between the first and second sheets (16, 14) and each have an enclosure (182) and a cavity (180) delimited by the enclosure (182). The enclosure (182) of each cell (18) comprises two openings (184) opposite one another, at least one of the openings (184) being coincident with an opening (184) in the enclosure (182) of an adjacent cell (18). The second sheet (14, 14', 14") comprises a non-porous portion (144) which covers at least a first acoustic treatment cell (18), and at least one porous portion (143) which is arranged facing at least a second acoustic treatment cell (18) and comprises at least one perforation (145) extending through the thickness of the second sheet (14, 14', 14"), making it possible for the acoustic waves to reach at least one second acoustic treatment cell (18) and said at least one first acoustic treatment cell (18) via the openings (184, 184").
(FR)
Panneau de traitement acoustique (10) destiné à être disposé sur au moins une paroi d'un turboréacteur (1) en contact avec un écoulement fluidique, le panneau (10) comprenant une première plaque (16), une seconde plaque (14) parallèle à la première plaque (16) et présentant une première face (141) destinée à être en contact avec un écoulement fluidique et une seconde face (142) en regard de la première plaque (16), et des cellules de traitement acoustique (18) s'étendant entre les première et seconde plaques (16, 14) et comportant chacune une enceinte (182) et une cavité (180) délimitée par l'enceinte (182). L'enceinte (182) de chaque cellule (18) comprend deux ouvertures (184) en vis-à-vis l'une de l'autre, au moins une des ouvertures 184) étant confondue avec une ouverture (184) de l'enceinte (182) d'une cellule (18) adjacente. La seconde plaque (14, 14', 14") comprend une portion non poreuse (144) couvrant au moins une première cellule de traitement acoustique (18) et au moins une portion (143) poreuse disposée en regard d'au moins une seconde cellule de traitement acoustique (18) et comprenant au moins une perforation (145) traversant l'épaisseur de la seconde plaque (14, 14', 14") et permettant aux ondes sonores d'accéder à au moins une seconde cellule de traitement acoustique (18) et à ladite au moins une première cellule de traitement acoustique (18) via les ouvertures (184, 184").
Latest bibliographic data on file with the International Bureau