Validation of the CQU-DTU-LN1 series of airfoils

The Science of Making Torque from Wind 2012

Shen, W.Z.^1 ; Zhu, W.J.^1 ; Fischer, A.^1 ; Garcia, N.R.^1 ; Cheng, J.T.^1,2 ; Chen, J.^2 ; Madsen, J.^3

Department of Wind Energy, Technical University of Denmark, Lyngby

DK-2800, Denmark^1

State Key Laboratory of Mechanical Transmission, Chong Qing University, Chongqing, China^2

LM Wind Power, Jupitervej 6, Kolding

6000, Denmark^3

关键词: Acoustic features;    Acoustic measurements;    Aero-dynamic performance;    Design process;    Noise emissions;    Numerical computations;    Virginia Tech;    Wind tunnel measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/555/1/012093/pdf
DOI  :  10.1088/1742-6596/555/1/012093

来源: IOP

【 摘 要 】

The CQU-DTU-LN1 series of airfoils were designed with an objective of high lift and low noise emission. In the design process, the aerodynamic performance is obtained using XFOIL while noise emission is obtained with the BPM model. In this paper we present some validations of the designed CQU-DTU-LN118 airfoil by using wind tunnel measurements in the acoustic wind tunnel located at Virginia Tech and numerical computations with the inhouse Q3uic and EllipSys 2D/3D codes. To show the superiority of the new airfoils, comparisons with a NACA64618 airfoil are made. For the aerodynamic features, the designed Cl and Cl/Cd agrees well with the experiment and are in general higher than those of the NACA airfoil. For the acoustic features, the noise emission of the LN118 airfoil is compared with the acoustic measurements and that of the NACA airfoil. Comparisons show that the BPM model can predict correctly the noise changes.