摘要
为了探究潮流能无轴轮缘导管涡轮机在波流相互作用下的非定常性能,文章依据斋堂岛海域的潮流条件,采用计算流体力学数值模拟方法分析了顺流和偏流对其水动力特性与尾流结构的影响。研究结果表明:在顺流条件下,随着叶尖速比(TSR)的增大,无轴轮缘导管涡轮机的功率系数(CP)和推力系数(CT)的波动幅度也逐渐增大;在偏流条件下,随着偏流角的增大,无轴轮缘导管涡轮机的平均CP和CT逐渐降低,而偏流也将导致CP和CT在一个波流周期内出现额外的波动,且额外波动的振幅随偏流角的增大而增大;受TSR和偏流角的影响,无轴轮缘导管涡轮机的尾流在向下游传播的过程中将呈现出较为复杂的形态,一部分来流将通过轴心处的开放缺口泄流而出形成射流涡,而随着TSR和偏流角的增大,该射流涡的范围将有所减小。
In order to investigate the unsteady performance of a tidal current shaftless rim-driven ducted turbine under wave-current interaction,the effects of aligned flow and yawed flow on hydrodynamics and wake structure were analyzed by computational fluid dynamics numerical simulation method based on the tidal current conditions in Zhaitang Island.The results show that:The fluctuation amplitude of C_(P) and C_(T) increases gradually with increasing of TSR in aligned flow condition.The average C_(P) and C_(T) decreased gradually with increasing of yaw angle in yawed flow condition.In addition,there are additional periodic fluctuations in C_(P) and C_(T) during one wave current cycle in yawed flow condition,and the fluctuation amplitude increases with increasing of yaw angle.Besides,the wake of the turbine is affected by TSR and yaw angle,which presents a more complex form in the process of spreading downstream.Furthermore,part of the incoming flow will leak through the open centre of the turbine and form a jet vortex,and the range of the jet vortex decrease with increasing of TSR and yaw angle.
作者
宋科
杨邦成
Song Ke;Yang Bangcheng(School of Mechanical and Electrical Engineering,Kunming University,Kunming 650214,China;Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2022年第8期1123-1128,共6页
Renewable Energy Resources
基金
云南省基础研究专项(202201AU070028)
昆明学院人才引进项目(YJL20023)。
关键词
潮流能
无轴轮缘导管涡轮机
波流相互作用
水动力特性
尾流
tidal power
shaftless rim-driven ducted turbine
wave-current interaction
hydrodynamics
wake structure
