摘要
为研究不同容量风力机尾流的相互作用情况,该文通过致动线模型(actuator line model,ALM)耦合大涡模拟(large eddy simulation,LES)的方法对串列布置两台容量不一的水平轴风力机在不同流向间距下的尾流场进行数值模拟,分析尾流场速度分布、涡量分布、频谱特性以及尾涡演变情况。结果表明,随着下游风力机的容量和几何尺寸的增加,尾流区速度波动越大,上下游风力机尾流掺混强度增强,掺混后的涡结构向上偏转程度加剧,使垂向尾流发展更加均匀,湍动能也较大;随着流向间距的增加,下游风力机的尾流受上游风力机轮毂中心涡的卷吸作用减弱,受下叶尖涡和塔筒脱落涡的裹挟输运作用增加。总体来讲,大小容量不同的风力机的尾流掺混能在一定程度上加速尾流的恢复,但是需要一定的发展空间来使其克服下游风力机产生的进一步速度亏损的影响,该文中的发展空间为6~8D。
To investigate the interaction of wakes from wind turbines with different capacities,the wake field of two horizontally axis wind turbines with different capacities arranged in series under different flow direction spacing is investigated using an actuator line model(ALM)coupled with a large eddy simulation(LES)approach,The velocity distribution,vorticity distribution,spectral characteristics and evolution of wake vortex are analyzed.Results show that as the capacity and geometric size of downstream wind turbines increase,the velocity fluctuations in the wake zone become more pronounced,the mixing intensity of the wake of the upstream and downstream wind turbines is enhanced,and the upward deflection degree of the blended vortex structure is intensified,ultimately leading to more uniform vertical wake development and elevated turbulent kinetic energy levels.With the increase of flow direction spacing,the wake of the downstream wind turbine is weakened by the entrapment and suction of the central vortex of the hub of the upstream wind turbine,and the entrapment and transport effect of the vortex of the lower blade tip and the tower shedding vortex increases.In general,the wake blending of wind turbines with different sizes and capacities can accelerate the recovery of wake to a certain extent.However,a certain development space is needed to overcome the impact of further velocity loss caused by downstream wind turbines,and the development space in this paper is 6~8D.
作者
张立栋
田史琳
冯江哲
任淮辉
陈哲
王兆新
ZHANG Lidong;TIAN Shilin;FENG Jiangzhe;REN Huaihui;CHEN Zhe;WANG Zhaoxin(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 130012,Jilin Province,China;Longyuan(Beijing)New Energy Engineering Technology Co.,Ltd.,Xicheng District,Beijing 100032,China;Jilin Longyuan New Energy Co.,Ltd.,Songyuan 138000,Jilin Province,China)
出处
《中国电机工程学报》
北大核心
2025年第11期4351-4359,I0019,共10页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
基金
龙源(北京)新能源工程技术有限公司科技项目(LYH-2021-17)
吉林省科技厅重点研发项目(20210203201SF)。
关键词
风力机
串列布置
尾流掺混
速度分布
涡量分布
功率谱密度
尾涡演变
wind turbine
serial arrangement
wake blending
velocity distribution
vorticity distribution
power spectral density
wake vortex evolution
