摘要
相比于三维CFD叶片真实模拟,致动盘方法将水轮机简化为流场中分布有作用力的核心区域,所需网格大大降低,节省了计算资源和计算时间。文章介绍了一种精度适中、计算成本较低的潮流能水轮机CFD致动盘数值模拟模型,将动量理论与CFD方法相结合,通过致动盘来模拟水轮机对流场的作用,通过求解Navier-Stokes方程获得尾流场。对比基于致动盘理论的数值模拟结果与真实水轮机的水槽实验数据,结果表明,致动盘数值模拟在远尾流处的结果比近尾流处更加接近实验值,致动盘方法很容易捕捉到远尾流的流场情况。研究结果可为潮流能大规模利用的数值模拟提供依据和参考。
Compared with the blade resolved 3D CFD simulations,the actuated disc method simplifies the turbine to the core area with the force acting on the flow field,thus leading to the less number of grids and computing resources and time.This paper introduced a numerical actuating disk simulation model with moderate precision and low calculation cost.The momentum theory was combined with the CFD to simulate the flow field of the turbine through the actuating disk.The wake field was obtained by solving the Navier-Stokes equation.A comparison between CFD actuator disk simulation and experimental measurement indicated that the results of the numerical simulation on the far wake were closer to the experimental results.The actuator disk method can capture the flow field of the far wake well.The results can provide the basis and reference for numerical simulation of large-scale utilization of tidal stream energy.
作者
张玉全
郑源
孙勇
张继生
臧伟
刘惠文
Zhang Yuquan;Zheng Yuan;Sun Yong;Zhang Jisheng;Zang Wei;Liu Huiwen(College of Energy and Electrical Engineering,Hohai University,Nanjing 210098,China;Management Division of Qinhuai River Hydraulic Engineering of Jiangsu Province,Nanjing 210001,China;College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)
出处
《可再生能源》
CAS
北大核心
2019年第1期144-150,共7页
Renewable Energy Resources
基金
国家自然科学基金项目(51809083)
江苏省自然科学基金项目(BK20180504)
江苏省水利科技项目(2018026)
中央高校基本科研业务费专项资金资助项目(2019B15114)
关键词
潮流能水轮机
尾流场
致动盘方法
模型实验
数值模拟
tidal steam turbine
wake velocity
actuator disk
model experiment
numerical simulation
