偏流条件下水平轴水轮机水动力学性能与尾流场研究  

Study on Hydrodynamic Performance and Wake Field of Horizontal Axis Turbine Under Yaw Flow Condition

作　　者：宋科 杨邦成[2] SONG Ke;YANG Bang-cheng(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)

机构地区：[1]昆明学院机电工程学院,云南昆明650214 [2]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《水电能源科学》2021年第8期178-180,80,共4页Water Resources and Power

基　　金：国家自然科学基金项目(11172116);昆明学院人才引进项目(YJL20023)。

摘　　要：针对水平轴水轮机在偏流条件下的复杂水动力学问题,借助计算流体力学(CFD)数值模拟方法,建立了水轮机的计算模型并通过试验数据验证了模型及方法的可靠性,之后对不同偏流角下的水平轴水轮机的水动力学性能及尾流场进行了研究。结果表明,随着偏流角的增大,水轮机的平均功率系数和推力系数逐渐下降,而瞬时功率系数、推力系数和压力脉动系数的波动幅值逐渐增大。此外,水轮机的尾流场将变得十分复杂和不稳定,并在下游相应位置处出现反向漩涡,但尾流速度恢复明显加快。Aiming at the complex hydrodynamic performance of horizontal axis turbine under yaw flow condition,the computational model of horizontal axis turbine was established based on the computational fluid dynamics(CFD)numerical simulation method,and the reliability of the model and method was verified by the experimental data.Then,the hydrodynamic performance and wake field of horizontal axis turbine were analyzed under different yaw angles.The results show that the average power coefficient and average thrust coefficient of the turbine decrease with increase of yaw angles,while the coefficient of instantaneous power,thrust and pressure pulsation increase.Besides,the wake field of the turbine is very complex and unstable,and there is a reverse vortex at the corresponding position downstream,but the recovery of wake velocity is obviously accelerated.

关 键 词：潮流能 水平轴水轮机 偏流角 水动力学性能 尾流场 

分 类 号：TK730.2[交通运输工程—轮机工程]