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1. WO2020115405 - METHOD AND DEVICE FOR DETECTING A ROTATING STALL ADVERSELY AFFECTING A TURBOJET ENGINE COMPRESSOR

Publication Number WO/2020/115405
Publication Date 11.06.2020
International Application No. PCT/FR2019/052853
International Filing Date 29.11.2019
IPC
F04D 27/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
27Control, e.g. regulation, of pumps, pumping nstallations or pumping systems specially adapted for elastic fluids
F02C 9/00 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
9Controlling gas-turbine plants; Controlling fuel supply in air-breathing jet-propulsion plants
CPC
F02C 9/00
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
9Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
F04D 27/001
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
27Control, e.g. regulation, of pumps, pumping installations or systems
001Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
F05D 2270/083
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
2270Control
01Purpose of the control system
08to produce clean exhaust gases
083by monitoring combustion conditions
F05D 2270/101
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
2270Control
01Purpose of the control system
10to cope with, or avoid, compressor flow instabilities
101Compressor surge or stall
Applicants
  • SAFRAN AIRCRAFT ENGINES [FR]/[FR]
Inventors
  • HERDA, Soufiane
  • CABRET, Vincent
  • DJELASSI, Cedrik
Agents
  • DELUMEAU, François
  • COUGARD, Jean-Marie
  • PERROT, Emilie
  • UNDERWOOD, Nicolas
Priority Data
187225403.12.2018FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD AND DEVICE FOR DETECTING A ROTATING STALL ADVERSELY AFFECTING A TURBOJET ENGINE COMPRESSOR
(FR) PROCEDE ET DISPOSITIF DE DETECTION D'UN DECOLLEMENT TOURNANT AFFECTANT UN COMPRESSEUR D'UN TURBOREACTEUR
Abstract
(EN)
The method for detecting a rotating stall comprises; - a step (E90, E100) of determining a level of variation of a static pressure in a combustion chamber of the turbojet engine around an average value of this static pressure; - a step (E11) of comparing the level of variation of the static pressure relative to a first threshold (THR.1); - a step (E140) of comparing a temperature measured at the outlet of a turbine of the turbojet engine relative to a second threshold; and - if the level of variation of the static pressure is greater than the first threshold and the temperature at the outlet of the turbine is greater than the second threshold, a step (E170) of detecting the presence of a rotating stall.
(FR)
Le procédé de détection d'un décollement tournant comprend; - une étape de détermination (E90, E100) d'un niveau de variation d'une pression statique dans une chambre de combustion du turboréacteur autour d'une valeur moyenne de cette pression statique; - une étape de comparaison (E11) du niveau de variation de la pression statique par rapport à un premier seuil (THR.1); - une étape de comparaison (E140) d'une température mesurée en sortie d'une turbine du turboréacteur par rapport à un deuxième seuil; et - si le niveau de variation de la pression statique est supérieur au premier seull et la température en sortie de la turbine est supérieure au deuxième seuil, une étape de détection (E170) d'une présence d'un décollement tournant.
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