基于Openfoam的怀来复杂地形风电场流动特性研究  

Research on Huailai complex wind farm terrain flow characteristics based on Openfoam

作　　者：叶昭良 闫姝[1] 史绍平[1] 曾崇济 陈新明[1] 张波[1] 马俊祥 Ye Zhaoliang;Yan Shu;Shi Shaoping;Zeng Congji;Chen Xinming;Zhang Bo;Ma Junxiang(State Key Laboratory of Coal-based Clean Energy(Huaneng Clean Energy Research Institute Limited Company),Beijing 102209,China;Huaneng Henan Clean Energy Research Institute Branch,Zhengzhou 450000,China)

机构地区：[1]煤基清洁能源国家重点实验室(中国华能集团清洁能源技术研究院有限公司),北京102209 [2]华能河南清洁能源分公司,河南郑州450000

出　　处：《可再生能源》2020年第4期471-476,共6页Renewable Energy Resources

基　　金：华能集团清洁能源技术研究院有限公司“高精尖”团队专项(TS-19-HJK01)。

摘　　要：针对实际风电场复杂地形的流动特性,基于Openfoam开源软件进行二次开发。通过自主研发的网格捕捉地形工具,运用计算流体力学(CFD)模拟方法,研究了复杂地形条件下不同扇区入口方向的流动模拟。模拟结果表明:基于Openfoam的复杂地形模拟方法具有较高的模拟精度,验证了方法的可行性;以河北怀来的实际复杂地形为研究对象,通过定性和定量速度场特性分析可知,风绕过山体,受到山体漩涡流动和风机尾流损失的影响,风电场的风能品质下降;主风向下流动的自持性较高,而在其他扇区进出口的流向速度梯度不为零,存在较大的回流现象,各个机位点在轮毂高位处的观测结果与商业软件计算结果相差15%左右。文章的研究方法对于复杂地形数值模拟和风电场微观选址具有重要的参考价值。In view of the actual wind flow characteristics of complicated terrian,the secondary development based on Openfoam open source software,through independent research and development of the grid generation tools to capture the terrain boundary,using computational fluid dynamics(CFD)simulation method.By Hebei complex terrain simulation results show that combined with the wind velocity field characteristics of qualitative and quantitative analysis,the overall performance of the wind farm is greatly affected by the ups and downs of the complex terrain,which is mainly manifested in the wind passing around the mountain,resulting in the influence of mountain vortex flow and wind turbine wake loss,the quality of wind energy in the whole field decreases the flow under the main wind direction has a higher self-sustaining property.Compared with the calculation results of commercial software,the difference at the hub velocity of each wind turbine position is about 15%.The current research methods are of great significance for numerical simulation of complex terrain and location selection of wind field onlookers.

关 键 词：复杂地形 风电场 速度场特性 湍流模型参数 OPENFOAM 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]