基于OpenFOAM的层结性对风力机尾流大气参数的影响  

Influence of stratification properties on atmospheric parameters of wind turbine wake based on OpenFOAM

作　　者：吴正人[1] 张智博 刘梅[2] 杜思源 张雷 Wu Zhengren;Zhang Zhibo;Liu Mei;Du Siyuan;Zhang Lei(Department of Power Engineering,North China Electric Power University,Baoding 071003,China;Department of Economics and Management,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学动力工程系,河北保定071003 [2]华北电力大学经济管理系,河北保定071003

出　　处：《可再生能源》2022年第7期926-931,共6页Renewable Energy Resources

摘　　要：层结性是影响大气参数变化的重要因素,不同的层结状态会对风力机尾流大气参数产生不同的影响。文章基于开源CPD平台OpenFoam,并结合大涡模拟和大气边界层理论,开发编译了特定求解器下的风力机模型,实现不同层结状态下风力机尾流对大气参数影响的研究。研究结果表明:稳定层结下风力机尾流的影响范围远,不稳定层结的风速损失较小,两种层结状态下风速分布规律相似;在轮毂高度处,不稳定层结下温度下降,稳定层结则上升;与来流大气温度相比,不稳定层结的远尾流区温度变化明显。在风轮高度以下及3d(风轮直径)以上区域,风力机后各处的温度分布不受尾流发展的影响;在风轮高度以下区域,不稳定层结下的尾流温度比来流大气温度低,而稳定层结则相反。Stratification is an important factor affecting atmospheric parameters,and different stratification states will have different effects on wind turbine wake atmospheric parameters.As an open source CFD software,OpenFoam has good performance in custom solver.Based on OpenFoam and combined with large eddy simulation and atmospheric boundary layer theory,the wind turbine model under specific solver is developed and compiled to study the influence of wind turbine wake on atmospheric parameters under different stratification conditions.The results show that under the stable stratification,the influence range of the wind turbine wake is far,the wind speed loss of the unstable stratification is small,and the wind speed distribution under the two stratification conditions is similar.Under the unstable stratification,the temperature decreases,while the stable stratification increases.Compared with the incoming atmospheric temperature,the change of the temperature in the far wake region of unstable stratification is more obvious than that of stable stratification.In the region below the height of the wind turbine and above 3d,the temperature distribution behind the wind turbine is not affected by the development of the wake.At the same time,in the region below the wind turbine,the wake temperature under the unstable stratification is lower than the incoming atmospheric temperature,while the stable stratification is on the contrary.

关 键 词：风力机尾流 大气边界层 大气层结 大涡模拟 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]