| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
To reduce the aero-acoustic noise of the aircraft wings with high lift devices, morphing flap concept was developed. Morphing flap is a kind of slotted flap with variable flap deflection distribution in span wise connecting to the outer wing. Noise source survey measurements using a phased array microphone system were carried out in a low-noise wind tunnel on the wing model with morphing flap. Test result showed that the morphing flap eliminates the flap side edge noise and suppresses the overall noise level, keeping sufficient high lift characteristics. Flow field measurement results also showed that the vortex flow around the flap edge was weakened by the morphing flap, and clarified the relation between the flow field and noise suppression effect. Furthermore, continuous flap deflection mechanism with elastic material and multi-rib structure was developed for the application to the actual aircraft wings.
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