Detailed flow measurement of the field around tidal turbines with and without biomimetic leading-edge tubercles

RENEWABLE ENERGY

卷:111

Article

Shi, Weichao^1,2  Atlar, Mehmet²  Norman, Rosemary¹ 

[1] Newcastle Univ, Sch Marine Sci & Technol, Armstrong Bldg, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

[2] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, Glasgow, Lanark, Scotland

关键词: Particle Image Velocimetry (PIV);    Tidal turbine;    Blade design;    Tubercles;    Biomimetic;   

DOI  :  10.1016/j.renene.2017.04.053

来源: Elsevier

【 摘 要 】

This paper focuses on implementing detailed flow measurement using advanced Particle Image Velocimetry (PIV) system to investigate the flow mechanism of leading-edge tubercles on tidal turbine blades. Two approaches have been applied: one is 2D PIV to map the flow separation around the blade sections at different radial positions; and the other is Stereo PIV to conduct a volumetric measurement in the wake field to reveal the tip vortex development and also velocity distribution. The research presented in this paper further demonstrates that the leading-edge tubercles can enable the flow to remain attached to the blades and weaken the three dimensional effect which can lead to efficiency loss or the so-called tip loss. Based on these phenomena that have been observed and concluded from the tests, the mechanism by which leading-edge tubercles can provide additional torque and thrust for a tidal turbine has been explained within this paper. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free