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The feasibility of water injection into the turbine coolant to permit gas turbine contingency power for helicopter applicationIt is pointed out that in certain emergency situations it may be desirable to obtain power from a helicopter engine at levels greater than the maximum rating. Yost (1976) has reported studies concerning methods of power augmentation in the one engine inoperative (OEI) case. It was found that a combination of water/alcohol injection into the inlet and overtemperature/overspeed could provide adequate emergency power. The present investigation is concerned with the results of a feasibility study which analytically investigated the maximum possible level of augmentation with constant gas generator turbine stress rupture life as a constraint. In the proposed scheme, the increased engine output is obtained by turbine overtemperature, however, the temperature of the compressor bleed air used for hot section cooling is lowered by injecting and evaporating water.
Document ID
19830058775
Document Type
Reprint (Version printed in journal)
Authors
Van Fossen, G. J. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 11, 2013
Publication Date
July 1, 1983
Publication Information
ISSN: 0022-0825
Subject Category
AIRCRAFT PROPULSION AND POWER
Report/Patent Number
ASME PAPER 83-GT-66
Distribution Limits
Public
Copyright
Other