RNLAF has experienced performance loss and an increased rate of in-flight compressor stalls due to compressor deterioration of some of their 15 year old engines. Investigation on the Maintenance Depot test bed showed that significant loss of air mass flow occurred near the surge line under conditions which were not covered by the normal post-overhaul acceptance tests. Also it was found that impending stall was always preceded by increasing pressure fluctuations, although the level of these pressure fluctuations varied with different engines. A method was developed to routine-check for this phenomenon. The surge margin of the affected engines was recovered by replacing the rear compressor casing. Further investigation is being conducted by the engine manufacturer to narrow down the reason for the engine's behaviour. (Peters)
Handling problems through compressor deterioration
Bedienungsprobleme durch Verschlechterung des Kompressors
1979
7 Seiten, 12 Bilder
Aufsatz (Konferenz)
Englisch
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