EP 0777828 A1 19970611 - COMPRESSOR STALL DIAGNOSTICS AND AVOIDANCE
Title (en)
COMPRESSOR STALL DIAGNOSTICS AND AVOIDANCE
Title (de)
DIAGNOSE UND VERMEIDUNG DES PUMPENS EINES VERDICHTERS
Title (fr)
DIAGNOSTIC ET 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)
Citation (search report)
See references of WO 9634207A1
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