基于改进延迟分离涡方法的潮流能水轮机偏航水动力分析
Hydrodynamic Analysis of Tidal Stream Turbine under Yaw Conditions Based on Improved Delayed Detached Eddy Simulation
刘红藏 1朱仁庆 1纪仁玮 2黄斐 1张玉全 3窦朋1
作者信息
- 1. 江苏科技大学船舶与海洋工程学院,镇江 212100
- 2. 江苏科技大学船舶与海洋工程学院,镇江 212100;河海大学港口海岸与近海工程学院,南京 210098
- 3. 河海大学电气与动力工程学院,南京 211100
- 折叠
摘要
为探究偏航工况对潮流能水轮机水动力及尾流场特性的影响,将改进的延迟分离涡模拟与滑移网格相结合,建立了偏航条件下潮流能水轮机水动力特性的数值模型.用潮流能水轮机的水槽试验结果验证了该数值模型的计算精度,并对水轮机在-50°～50°偏航角时的水动力及尾流场特性进行研究.结果表明:(1)水轮机的平均功率系数和推力系数随偏航角的增大而快速减小,且瞬时功率系数和推力系数的波动幅值逐渐增大;(2)随着偏航角的增大,尾流场速度分布的不对称性更加显著,同时尾流场速度衰减逐渐加快;(3)水轮机在正偏航角和负偏航角下的结果并非完全对称,正偏航角时的功率系数比负偏航角时大,这可能是由于水轮机的旋转效应更有利于在正向偏航时获取能量.
Abstract
To investigate the influence of yaw conditions on the hydrodynamic forces and wake field characteristics of the tidal stream turbine(TST),this paper establishes a numerical model for the TST under yaw conditions with a combination of the improved delayed detached eddy simulation model and sliding meshes.the flume test results of the TST are selected to verify the calculation accuracy of the established numerical model,and hydrodynamic forces and wake characteristics of the TST are studied under angles from-50°to 50°.The results show that:(1)The average power coefficient and thrust coefficient of the TST decreases rapidly with the increase of the yaw angle,while the fluctuation amplitude of the instantaneous power coefficient and thrust coefficient increases gradually.(2)With the increase of yaw angle,asymmetry of flow velocity in the wake field is more significant,and the velocity attenuation in the wake accelerates gradually.(3)The numerical results under positive and negative yaw angles are not completely symmetrical,and the power coefficient at the positive yaw angle is larger than that at the negative yaw angle.It is possible that the rotational effect of the turbine is more conducive to energy acquisition during positive yaw.
关键词
潮流能水轮机/改进延迟分离涡方法/偏航角/水动力特性/尾流场Key words
tidal stream turbine/improved delayed detached eddy simulation/yaw angle/hydrodynamic characteristics/wake引用本文复制引用
基金项目
国家自然科学基金项目(52271318)
国家自然科学基金项目(52301321)
江苏省高等学校基础科学(自然科学)研究项目(24KJB570001)
出版年
2024
NETL
NSTL
万方数据