Short takeoff and landing (STOL) aircraft using externally blown flaps (EBF) for lift augmentation develop considerable jet-flap interaction noise. A proposed method to reduce the EBF trailing edge noise is to locate a slot near the trailing edge of a flap through which low velocity secondary air is blown. Limited OASPL noise data were obtained from the interaction of the jet exhaust from a 5.08 cm diameter convergent nozzle with the trailing edge of a plate, and are presented for five slot configurations located near or at the trailing edge of the plate. Also presented are some significant jet trailing edge interaction data using a mixer nozzle with one of the slot configurations.
Externally blown flap trailing edge noise reduction by slot blowing: A preliminary study
Aerospace Sci. Meeting Tech. Display ; 1973 ; Washington, D. C., United States
1973-01-01
Conference paper
No indication
English
NTRS | 1972
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