Development and Testing of a Commercial Turbofan Engine for High Altitude UAV Applications 2001-01-2972
A High Altitude Test Program has been recently completed by Pratt & Whitney in conjunction with NASA (National Aeronautics and Space Administration) and MTU (Motoren-und Turbinen-Union, Munchen GmbH) to test an instrumented, “off-the-shelf”, commercial turbofan engine to altitudes >65,000 ft for suitability for high altitude applications.
The two-phase test program has been conducted at the Propulsion Systems Laboratory of the Glenn Research Center in Cleveland, Ohio. The 1st phase (Aug ‘99) investigated the basic performance and operability characteristics in order to identify any shortcomings. The 2nd phase (May ‘01) investigated the response to inlet distortion and high power off-takes, and included extensive steady state and transient instrumentation in the low pressure turbine for the correlation of analytical predictions.