Wake structure and mechanical energy transformation induced by a horizontal axis tidal stream turbine

被引：4

作者：

Lin, Jie ^{[1
]}

Lin, Binliang ^{[1
]}

Sun, Jian ^{[1
]}

Chen, Yaling ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China

[2] Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China

来源：

RENEWABLE ENERGY | 2021年 / 171卷

基金：

中国国家自然科学基金;

关键词：

Tidal stream turbine; Wake structure; Energy transformation; Turbine rotor;

D O I：

10.1016/j.renene.2021.02.091

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The horizontal axis turbine is one of the most promising energy extractors for tidal stream energy utilization. However, there is no widely accepted model for describing the wake structure of a tidal stream turbine. Besides, the flow velocity variation in wakes is accompanied by energy transformation and has hardly been investigated to date. In this paper, a brief review of existing laboratory tidal stream turbine experiments is first presented, followed by a discussion about the controlling variables that includes cross-comparisons between different results from physical laboratory tests. Theoretical derivation and experimental data analysis are conducted to enable a better understanding of the energy transformation and wake development processes, and tidal stream energy extraction. It has been found that part of the flow kinetic energy has been converted into potential energy before reaching the rotor, commonly used power coefficients are not equivalent when quantifying energy extraction, and it is possible to reconstruct turbine wakes using 3 independent data-based parameters. (c) 2021 Elsevier Ltd. All rights reserved.

引用

页码：1344 / 1356

页数：13