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Breaking the "Flutter" Code
Before installing new elements within aircraft engines with the goal of
reducing noise, being able to predict what will happen inside that
engine is a big plus. To gain this advantage, NASA researchers developed
a special computer code called TURBO-AE. The code analyzes the predicted
interactions between structures and aerodynamics—like air flow over an
engine's vibrating and spinning fan blades.
Using TURBO-AE, along with its sister code, TURBO, NASA created
realistic, physics-based modeling to identify how much "flutter" might
occur in a new fan design. The codes identified opportunities to reduce
flutter and vibration problems during engine development, making it
possible to build thinner, more efficient blades, and leading to
improved efficiency, lower fuel burn, lower decibels, and lower
emissions.
The TURBO-AE/TURBO technologies also provided a good example of how NASA
research makes its way into the public domain. GE Aircraft Engines
successfully used TURBO to analyze engine designs against blade
failures. Honeywell incorporated TURBO-AE as part of its design system,
as did Williams International, and Siemens Westinghouse Power
Corporation. And the codes have been used for aeroelastic research work
by the Air Force Propulsion Research Lab, NAVAIR, Naval Postgraduate
School, Duke University, University of Kentucky, Purdue University, and
Ohio State University.
Engine Aeroelastic Analysis Team
NASA Glenn Research Center, Honeywell, GE Aircraft Engines, Williams
International, Siemens Westinghouse, University of Toledo, Mississippi
State University
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