Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
A study on the noise characteristics and blade performance of propellers with leading edge protuberance (LEP) was conducted in order to reduce the fluid dynamic noise generated by drone propellers. Noise, thrust and torque measurements were carried out to investigate the effectiveness of a LEP on reducing noise and improving wing performance. As a results, neither noise reduction nor improvement of wing performance were found for the wing with LEP compared to the wing with straight leading edge. The investigation in which the mounting position of the LEP was changed found that the LEP mounted near the wing tips, where the rotation speed increases, has a significant effect on the deterioration of the noise. In addition, the investigation using wing models with different wavelength and amplitude found that longer wavelength and smaller amplitude of LEP improves the noise characteristic and wing performance because the leading-edge shape becomes more similar like the linear leading edge.
