What is it about?
This paper reports a study of the sound emitted by a slat of a two-dimensional three-element MD30P30N airfoil, on which a two-dimensional excrescence was installed to represent a sealing device.
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Why is it important?
Nine seal positions along the slat cove wall and six different seal cross sections were tested for 3–9 deg angles of attack and 34 m∕s freestream speed. At some positions, the narrowband peaks were increased up to 18 dB∕Hz, whereas for other positions, they were virtually suppressed. At the noisiest position, even a seal whose height was 1.33% of the slat chord strongly affected the slat noise signature.
Perspectives
We believe it will be of interest to readers interested in airframe noise in general or in either numerical or experimental studies. Since aircraft noise is a leading topic in aeroacoustics, we believe the paper would also draw attention from researchers in other areas in the aeroacoustics field.
Mr. Filipe Amaral
Universidade de Sao Paulo Campus de Sao Carlos
Read the Original
This page is a summary of: Effect of Bubble Seal on Slat Noise, AIAA Journal, December 2018, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/1.j057381.
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