26th Congress of International Council of the Aeronautical Sciences
including the 8th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference
14 - 19 September 2008, Anchorage, Alaska, USA
Paper ICAS2008-P2.14

RELATION BETWEEN TRAILING EDGE NOISE AND BOUNDARY LAYER INSTABILITY

Y. Konishi, S. Takagi, T. Kurotaki, Y. Kohama*, T. Kato*
JAXA, Japan; *Tohoku Univ., Japan

Keywords: trailing-edge noise, boundary-layer transition, acoustic feedback

Experiments are conducted to reveal the frequency-selection mechanism of the trailing edge noise. When the T-E noise is suppressed artificially, naturally growing broad-band T-S waves are observed. This indicates that the feedback loop between T-E noise and T-S waves actively contributes to generation of tonal T-E noise.

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