AERODYNAMIC PERFORMANCE AND ASSOCIATED NOISE GENERATION SPECTRA OF AIRFOIL

Document Type : Original Article

Authors

1 Lecturer, Dept. of Mechanical Engineering, Faculty of Engineering and Technology, Minia University, Minia, Egypt.

2 Associate professor, Dept. of Mechanical Engineering, Faculty of Engineering and Technology, Minia University, Minia, Egypt.

Abstract

Noise reduction of turbo-machines is one of the most important targets in the modern technology. This can be achieved by a proper choice of the air-foil which makes a significant reduction in noise level with the best aerodynamic performance. This paper presents an experimental study carried out on a symmetric airfoil with the aim of investigating its performance and associated noise generation. The influence of flow velocity and angle of attack is also presented. The results indicate that the change in flow velocity is accompamed by a variation in the noise spectrum measured. A comparison has been made with other available data and showed that the lowest noise level is obtained in most cases close to the point of the best airfoil aerodynamic performance.

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