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Comparisons of Rig and Engine Dynamic Events in the Compressor of an Axi-Centrifugal Turboshaft EngineSteady state and dynamic data were acquired in a T55-L-712 compressor rig. In addition, a T55-L-12 engine was instrumented and similar data were acquired. Rig and engine stall/surge data were analyzed using modal techniques. This paper compares rig and engine preliminary results for the ground idle (approximately 60% of design speed) point. The results of these analyses indicate both rig and engine dynamic event are preceded by indications of traveling wave energy in front of the compressor face. For both rig and engine, the traveling wave energy contains broad band energy with some prominent narrow peaks and, while the events are similar in many ways, some noticeable differences exist between the results of the analyses of rig data and engine data.
Document ID
19970002986
Document Type
Technical Memorandum (TM)
Authors
Owen, A. Karl (Army Research Lab. Cleveland, OH United States)
Mattern, Duane L. (NYMA, Inc. Brook Park, OH United States)
Le, Dzu K. (NASA Lewis Research Center Cleveland,OH United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1996
Subject Category
Aircraft Propulsion and Power
Report/Patent Number
ASME-96-GT-239
ARL-TR-1108
E-10478
NAS 1.15:107339
NASA-TM-107339
Meeting Information
Gas Turbine and Aeroengine Congress(Birmingham)
Funding Number(s)
PROJECT: RTOP 505-62-0L
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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