G - Physics – 01 – M
Patent
G - Physics
01
M
G01M 15/14 (2006.01) F01D 21/14 (2006.01)
Patent
CA 2613865
An isolation method and system is described for distinguishing between turbine case cooling (TCC) and high pressure turbine (HPT) performance faults. A trend is observed in gas path parameter data during cruise and a resulting percent .DELTA. signature across the shift in the gas path parameters is assignable to either an HPT or TCC performance fault. During either fault, exhaust gas temperature (EGT) will shift upward. Since take-off EGT margin is calculated from take-off data, the shift, or lack of shift in EGT margin may be used to differentiate between TCC and HPT faults.
Une méthode et un système de diagnostic sont décrits en vue de distinguer l'anomalie du système de refroidissement d'un carter de turbine (TCC) de celle d'une turbine haute pression (HPT). L'observation d'une tendance des données paramétriques de la veine gazeuse en altitude de croisière et le pourcentage DELTA qui découle des changements ainsi observés permettent de déterminer si l'anomalie se situe dans le TCC ou la HPT. Ces deux anomalies font monter la température du gaz d'échappement (EGT). Comme la marge d'EGT est calculée au moment du décollage, tout changement au niveau de la température permet dès lors de distinguer les anomalies du TCC de celles de la HPT.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
United Technologies Corporation
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