|Source||CMES: Computer Modeling in Engineering & Sciences, Vol. 108, No. 5, pp. 315-330, 2015|
|Download||Full length paper in PDF format. Size = 32,863,367 bytes|
|Keywords||Propeller; Aerodynamic noise; Computational fluid dynamics (CFD); Boundary element method (BEM); SPLs; BPF.|
In order to accurately predict the aerodynamic noise of the propeller, a hybrid method combining Computational Fluid Dynamics (CFD) method with Boundary Element Method (BEM) is developed in this paper. The calculation includes two steps: firstly, the unsteady viscous flow around the propeller is calculated using the CFD method to acquire the noise source information; secondly, the radiated sound pressure is calculated using BEM method in the frequency domain. In comparison with the experimental results from wind tunnel, the calculated results of aerodynamic performance are rather desirable. The simulation and experimental results of aerodynamic noise are well fitted. The directivity of sound pressure levels (SPLs) of propeller noise is shown in this paper. Simulation shows that the method can effectively calculate aerodynamic noise of the propeller. The acoustic analysis draws some meaningful conclusions.