BROADBAND ROTOR NOISE PREDICTION BASED ON A NEW FREQUENCY-DOMAIN FOUMULATION

• Published in: Journal of hydrodynamics. Series B Vol. 22; no. 3; pp. 387 - 392
• Main Authors: XIE, Jian-bo, ZHOU, Qi-dou, FANG, Bin
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.06.2010; Springer Singapore
• Subjects: acoustics; Aerodynamics; Broadband; broadband noise; Computational fluid dynamics; Engineering; Engineering Fluid Dynamics; Fluid flow; frequency-domain formulation; Hydrology/Water Resources; Noise; Numerical and Computational Physics; rotor; Rotors; Simulation; Turbulence; Turbulent flow; 叶片表面; 噪声预测; 宽带噪声; 数值方法; 空气动力学; 转子轴; 辐射噪声; rotor; broadband noise; frequency-domain formulation; acoustics
• ISSN: 1001-6058; 1878-0342
• DOI: 10.1016/S1001-6058(09)60069-X

This article studies the broadband noise of a rotor in upstream turbulence. A numerical approach is proposed, based on frequency domain, for predicting rotor broadband noise which requires the aerodynamic sources to be integrated over the actual blade surface rather than over the mean-chord surface. The prediction of the radiated rotor broadband noise due to turbulence is made. This method is validated through a comparison between numerical predictions and measured data, with a reasonable agreement. Noise level directivity shows that the main lobe is located along the rotor axis, while the minimum noise occurs in the direction vertical to the rotor axis.