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Contingency power for small turboshaft engines using water injection into turbine cooling airBecause of one engine inoperative requirements, together with hot-gas reingestion and hot day, high altitude takeoff situations, power augmentation for multiengine rotorcraft has always been of critical interest. However, power augmentation using overtemperature at the turbine inlet will shorten turbine life unless a method of limiting thermal and mechanical stresses is found. A possible solution involves allowing the turbine inlet temperature to rise to augment power while injecting water into the turbine cooling air to limit hot-section metal temperatures. An experimental water injection device was installed in an engine and successfully tested. Although concern for unprotected subcomponents in the engine hot section prevented demonstration of the technique's maximum potential, it was still possible to demonstrate increases in power while maintaining nearly constant turbine rotor blade temperature.
Document ID
19870058015
Document Type
Conference Paper
Authors
Biesiadny, Thomas J. (NASA Lewis Research Center Cleveland, OH, United States)
Berger, Brett (NASA Lewis Research Center Cleveland, OH, United States)
Klann, Gary A. (NASA Lewis Research Center Cleveland, OH, United States)
Clark, David A. (NASA Lewis Research Center; U.S. Army, Propulsion Directorate, Cleveland OH, United States)
Date Acquired
August 13, 2013
Publication Date
June 1, 1987
Subject Category
AIRCRAFT PROPULSION AND POWER
Report/Patent Number
AIAA PAPER 87-1906
Distribution Limits
Public
Copyright
Other