EP 0777828 B1 20020821 - COMPRESSOR STALL AVOIDANCE
Title (en)
COMPRESSOR STALL AVOIDANCE
Title (de)
VERMEIDUNG DES PUMPENS EINES VERDICHTERS
Title (fr)
EVITEMENT DU CALAGE DE COMPRESSEURS
Publication
Application
Priority
- US 9605309 W 19960417
- US 42733495 A 19950424
- US 1318796 P 19960312
Abstract (en)
[origin: WO9634207A1] A pressure sensor (12) is located in the compressor stage of a gas turbine engine (10) to provide a pressure signal (PR1) that shows the compressor flow characteristics. The pressure signal (PR1) is applied to a bandpass filter (16) with roll-offs above and below N2. The difference between the filter output and a stored value for the pressure signal is integrated, and compressor bleed valves (18) are opened if the integral exceeds a stored threshold. The health of a compressor stage is determined by analyzing the magnitude of compressor pressure variations at N2 while accelerating the engine and by comparing the magnitude with values obtained from a compressor with a known stall margin.
IPC 1-7
IPC 8 full level
F04D 27/02 (2006.01)
CPC (source: EP)
F04D 27/001 (2013.01); F04D 27/0223 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9634207 A1 19961031; AU 5850796 A 19961118; DE 69623098 D1 20020926; DE 69623098 T2 20021219; EP 0777828 A1 19970611; EP 0777828 B1 20020821
DOCDB simple family (application)
US 9605309 W 19960417; AU 5850796 A 19960417; DE 69623098 T 19960417; EP 96920104 A 19960417