Experimental investigation and numerical Simulation of propeller noise

In this paper, the experimental and computational analysis of the noise of the P17×5.8 propeller for 2500 rpm and 7000 rpm was carried out. The experiments showed that at 7000 rpm, the maximum noise level was 79.2 dB under the propeller and decreased to 75.3 dB at a distance of four propeller diameters. The harmonic spectrum is dominated by low-frequency tonal components at the blade frequency and its harmonics. Numerical modelling in ANSYS confirmed a similar distribution in the frequency spectrum, but showed higher noise levels, which is explained by differences in geometry and idealised design models. The obtained results coincide with the experimental and numerical data of other studies, which confirms the effectiveness of the proposed experimental setup, which is planned to be used in the future to study the noise of the optimal blade shape.