Patent ID: 6755617
Filing Date: 2004-06-29
Classification: F01D,F04D,Y02T

Abstract:
A method for the early detection of instabilities in an aerodynamic flow in a turbomachine compressor including a rotor carrying rows of moving blades which rotate between rows of fixed blades, said method comprising the steps of:a) collecting signals over a predetermined length of time from at least one sensor disposed at an angular position &thgr; on a circumference of the compressor between successive rows of fixed and moving blades; b) normalizing the signals collected; c) detecting, from the normalized signals, events for which the normalized signals have a property including an absence of passage through a zero value during a length of time Tz at least greater than the time Ta taken for two successive moving blades to pass said sensor; d) analyzing all of the detected events; and e) making a decision regarding an imminence of instability in the aerodynamic flow through the compressor according to a result of the analysis of the detected events.