IDDES方法模拟风切变下大型水平轴风力机流场特性  

The Flow Field Characteristics of Large Horizontal Axis Wind Turbine in Shear Inflow Based on IDDES Method

作　　者：杨从新[1,2] 张宇婷 岳念西 YANG Congxin;ZHANG Yuting;YUE Nianxi(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050 China;Gansu Province Technology Center for Wind Turbines,Lanzhou 730050 China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]甘肃省流体机械及系统重点实验室,甘肃兰州730050

出　　处：《西华大学学报（自然科学版）》2024年第1期78-86,共9页Journal of Xihua University:Natural Science Edition

基　　金：国家自然科学基金资助项目(12062012);甘肃省风力机工程技术研发中心专项基金(071904)。

摘　　要：为研究风切变条件下大型水平轴风力机流场特性,以NH 1500 kW大型水平轴风力机为研究对象,运用计算流体力学中模拟流场精度较高的IDDES(改进延迟分离涡)方法,分析流场内瞬时速度分量、脉动速度和风力机输出功率。结果表明:风轮平面周围流场速度波动大,轴向速度在风轮旋转边界以外的区域会增大,在旋转边界以内的区域会亏损;脉动风速频谱特性在低频区与风轮转频的整数倍相关,风力机功率呈余弦形式输出并满足湍流谱特性。In order to study the flow field characteristics of large horizontal axis wind turbine under wind shear,the NH 1500 kW large horizontal axis wind turbine was taken as the research object.The flow field characteristics such as instantaneous velocity component,pulsation velocity and wind turbine output power were analyzed by IDDES(improved delayed detached eddy simulation)method with high simulated flow field accuracy in CFD.The results show that the flow field velocity around the wind wheel plane fluc-tuates greatly,and the axial velocity increases outside the rotating boundary of the wind wheel,while de-creases within the rotation boundary.The spectral characteristics of the pulsation velocity are related to the integer times of the rotation frequency of the wind wheel in the low frequency region.The simulated wind turbine power in cosine form satisfies the turbulent spectral characteristics.

关 键 词：水平轴风力机 数值模拟 IDDES方法 流场特性 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]