A major source of noise in commercial turbofan engines is the interaction of the fan blade wakes with the fan exit vanes (stators). These wakes can be greatly reduced by filling them with air blown out of the blade trailing edge. Extensive testing of this concept has demonstrated significant noise reductions. These tests were conducted on a low-speed, 4- ft-diameter fan using hollow blades at NASA Glenn Research Center's Aeroacoustic Propulsion Laboratory (AAPL).
New Fan Engine Noise-Reduction Concept Using Trailing Edge Blowing of Fan Blades Demonstrated
2002-03-01
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Trailing Edge Blowing of Fan Blades
AIAA | 2005
|Low-Speed Fan Noise Reduction with Trailing Edge Blowing
AIAA | 2002
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