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The present study focuses on the aerodynamic characteristic and aeroacoustic noise of the propeller used for UAV. The propeller includes 3-blades with 9 inch diameter. The objective of the present study is to develop the blade profile satisfying the thrust force of 1.6 kg and the overall noise of 60 dB(A) 10 m away from UAV. For CFD (Computational Fluid Dynamics) simulation, a computational domain is considered for a repeating section of single blade, and periodic boundary conditions are adopted. To validate the numerical method, the experiment is performed. In addition, the effect of blade pitch on the propeller performance is analyzed, and the optimal value of the blade pitch is obtained. Through the numerical and experimental results, we would like to present not only the aerodynamic and aeroacoustic characteristics of 3-blade propeller but also the optimal design of blade profile used for UAV.

computation; simulation; numerical methods