摘要
针对实海况条件下来流梯度,基于现场实测的流速和水深数据,对实尺度水平轴潮流能水轮机的水动力学性能进行仿真,对比水轮机在流速梯度影响下获能和轴向力变化规律。结果表明,真实潮流场中流速梯度不仅对水轮机的获能和轴向力产生影响,还会造成流场的布放水深对水轮机实际获能产生影响。同时,流速梯度造成水轮机运行时所受载荷发生动态变化,使得叶片处于不同位置时轴向力和转矩呈现周期性波动,影响叶片的获能和动力稳定性,引起振动和寿命疲劳等问题。
According to the real ocean tidal field complex conditions,this paper studied the hydrodynamic performance of full-scale horizontal axis tidal stream turbine using velocity profile and bathymetry data from a real tidal stream site,and compared the power and axial force coefficient of the turbine under the influence of the velocity gradient. The results showed the velocity gradient not only affects the energy conversion and axial force,but also decreases power output of the turbine with the increase of the water depth. Moreover,the velocity gradient will bring dynamic loading to the turbine,and cause the axial force and torque of the blade fluctuate cyclically when rotates locate in different positions.Consequently it reduces power and dynamic stability of the blade as well as produces issues such as vibration and life fatigue.
作者
司先才
王树杰
袁鹏
谭俊哲
于晓丽
张敬斌
Si Xiancai;Wang Shujie;Yuan Peng;Tan Junzhe;Yu Xiaoli;Zhang Jingbin(College of Engineering,Ocean University of China,Qingdao 266100,China;Qingdao Key Laboratory of Marine Renewable Energy,Qingdao 266100,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第8期2220-2227,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51479185
51279191)
关键词
流速梯度
水平轴潮流能水轮机
获能特性
动态载荷
水动力学性能
velocity profile
horizontal axis tidal turbine
characteristic of energy extracting
dynamic loading
hydrodynamic performance
