Investigation of the aerodynamics of an innovative vertical-axis wind turbine

21st Fluid Mechanics Conference

物理学;力学

Kludzinska, K.^1 ; Tesch, K.^1 ; Doerffer, P.^2

Gdansk University of Technology, ul. G.Narutowicza 11/12, 80-233, Gdansk, Poland^1

Institute of Fluid Flow Machinery, ul. Fiszera 14, 80-231, Gdansk, Poland^2

关键词: Aerodynamic phenomena;    Eigenvalues;    Innovative design;    Savonius wind turbine;    Three-dimensional analysis;    Velocity gradients;    Vertical axis wind turbines;    Vortex structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/530/1/012007/pdf
DOI  :  10.1088/1742-6596/530/1/012007

学科分类：力学，机械学

来源: IOP

【 摘 要 】

This paper presents a preliminary three dimensional analysis of the transient aerodynamic phenomena occurring in the innovative modification of classic Savonius wind turbine. An attempt to explain the increased efficiency of the innovative design in comparison with the traditional solution is undertaken. Several vorticity measures such as enstrophy, absolute helicity and the integral of the velocity gradient tensor second invariant are proposed in order to evaluate and compare designs. Discussed criteria are related to the vortex structures and energy dissipation. These structures are generated by the rotor and may affect the efficiency. There are also different vorticity measure taking advantage of eigenvalues of the velocity gradient tensor.