Aerodynamic noise measurement in anechoic wind tunnel of rod-airfoil with leading edge serrations
Turbulent flow interaction with the leading edge of an airfoil generates a well-known leading edge noise. The present work is an experimental investigation of reducing the leading edge noise by adapting serrations on the leading edge of NACA0012 airfoil. A rod is placed upstream of the airfoil to ma...
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Main Authors: | , |
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Format: | Article |
Language: | English |
Published: |
Penerbit Akademia Baru
2018
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Subjects: | |
Online Access: | http://eprints.utm.my/id/eprint/85372/1/SitiRuhliahLizarose2018_AerodynamicNoiseMeasurementInAnechoicWind.pdf http://eprints.utm.my/id/eprint/85372/ http://www.akademiabaru.com/doc/ARFMTSV47_N1_P97_107.pdf |
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Summary: | Turbulent flow interaction with the leading edge of an airfoil generates a well-known leading edge noise. The present work is an experimental investigation of reducing the leading edge noise by adapting serrations on the leading edge of NACA0012 airfoil. A rod is placed upstream of the airfoil to magnify the turbulence flow-leading edge interaction. Locations and the size of the serrations are two parameters being investigated for the noise reduction. The study found that a noise reduction up to 3.5 dB is obtained when the size of the serration is wider. Additionally, more sound reduction can be obtained when the angle of attack is increased. |
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