High Stability Engine Control (Histec): Flight Demonstration Results

Document Number: 985556

Date Published: September 1998

Author(s):
John C. Delaat - NASA Lewis Research Center
Robert D. Southwick - Pratt and Whitney
John Orme - NASA Dryden Flight Test Center
George W. Gallops - Pratt and Whitney

Abstract:
Future aircraft turbine engines, both commercial and military, must be able to accommodate expected increased levels of steady-state and dynamic engine-face distortion. The current approach of incorporating sufficient design stall margin to tolerate these increased levels of distortion would significantly reduce performance. The high stability engine control (HISTEC) program has developed technologies for an advanced, integrated engine control system that uses measurement-based estimates of distortion to enhance engine stability. The resulting distortion tolerant control reduces the required design stall margin, with a corresponding increase in performance and/or decrease in fuel burn. The HISTEC concept was successfully flight demonstrated on the F-15 ACTIVE aircraft during the summer of 1997. The flight demonstration was planned and carried out in two parts, the first to show distortion estimation, and the second to show distortion accommodation. Post-flight analysis shows that the HISTEC technologies are able to successfully estimate and accommodate distortion, transiently setting the stall margin requirement on-line and in real-time. Flight demonstration of the HIST technologies has significantly reduced the risk of transitioning the technology to tactical and commercial engines.

File Size: 2610K
Product Status: In Stock

See other papers presented at World Aviation Congress _® & Exposition, September 1998, Anaheim, CA, USA, Session: Propulsion Flight Test

Purchase more technical papers and save! With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay. Learn more >