Performance Deterioration of Commercial High-Bypass Ratio Turbofan Engines 801118
The Aircraft Energy Efficiency Program within NASA is developing technology required to improve the fuel efficiency of commercial subsonic transport aircraft. One segment of this program, the Engine Component Improvement (ECI) Project, includes Engine Diagnostics which is directed toward determining the sources and causes of performance deterioration in the Pratt & Whitney Aircraft JT9D and General Electric CF6 high-bypass ratio turbofan engines and developing technology for minimizing the performance losses. This paper presents the results of engine performance deterioration investigations based on historical data, special engine tests, and specific tests to define the influence of flight loads and component clearances on performance. The results of analyses of several damage mechanisms that contribute to performance deterioration such as blade tip rubs, airfoil surface roughness and erosion, and thermal distortion are also included. The significance of these damage mechanisms on component and overall engine performance is discussed.
Citation: Mehalic, C. and Ziemianski, J., "Performance Deterioration of Commercial High-Bypass Ratio Turbofan Engines," SAE Technical Paper 801118, 1980, https://doi.org/10.4271/801118. Download Citation
Author(s):
Charles M. Mehalic, Joseph A. Ziemianski
Affiliated:
NASA, Lewis Research Center, Cleveland, OH
Pages: 16
Event:
Aerospace Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Engine components
Turbofan engines
Fuel economy
Energy conservation
Wear
Aircraft
Erosion
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »