基于叶片动态响应后风轮输出特性的CFD仿真  

CFD Simulation Based on the Dynamic Response of the Vane

作　　者：方玉财 陈永艳[1,2,3] 高志鹰 闫萌萌[1] FANG Yu-cai;CHEN Yong-yan;GAO Zhi-ying;YAN Meng-meng(Inner Mongolia University of Technology,Hohhot Inner Mongolia 010051,China;Key Laboratory of Wind and Solar Energy Utilization Technology Ministry of Education,Hohhot Inner Mongolia 010051,China;Key laboratory of Wind and Solar Energy Utilization Mechanism and Optimization in Inner Mongolia Autonomous Region,Hohhot Inner Mongolia 010051,China)

机构地区：[1]内蒙古工业大学,内蒙古呼和浩特010051 [2]风能太阳能利用技术教育部重点实验室,内蒙古呼和浩特010051 [3]内蒙古自治区风能太阳能利用机理及优化重点实验室,内蒙古呼和浩特010051

出　　处：《计算机仿真》2020年第2期106-109,158,共5页Computer Simulation

基　　金：国家自然科学基金(51866012,51366010);内蒙古自治区自然科学基金重大项目(2018ZD08);风能太阳能利用技术教育部重点实验室开放基金项目(201605)。

摘　　要：通过模态实验测得叶片低阶弯振特征向量,经过Matlab拟合获得风轮振动控制方程。自编UDF代码实现对运行风轮振动形态的控制。数值模拟过程中利用动网格技术施加到风轮叶片,控制其运动形态,使其旋转的同时做垂直于旋转面的弯振运动。湍流模型选择大涡模拟(LES)研究振动风轮输出特性规律。研究结果表明:施加低阶弯振后,叶片中部位置出现压力指向性的改变,扭矩和推力波动明显加剧且呈现出周期性规律。弯振的施加使风轮功率下降,且下降趋势随着风速和尖速比增大而增强。通过仿真叶片的结构动态响应,为改进和优化常规风力机性能分析及流固耦合分析提供新思路。The feature vector of low-order bending vibration of blade was measured by modal experiment.The vibration control equation of wind wheel was obtained by Matlab fitting.The self-compiled UDF code was used to control the vibration form of wind wheel.In the process of numerical simulation,the dynamic grid technique was applied to the blade to control the motion pattern,so as to make it rotate while doing the bending vibration perpendicular to the rotating surface.In order to study the output characteristics of vibrating wind wheel,large eddy simulation(LES)was chosen by the turbulence model.The results show that the pressure directivity changes in the middle of blade after low-order bending vibration is applied.The torque and thrust fluctuate obviously,which presents the periodic trends.The application of bending vibration reduces the power of wind wheel.The downward trend increases with the increase of wind speed and tip-speed ratio.Through the simulation for dynamic response of blade structure,this paper provides a new idea for improving and optimizing the performance analysis and fluid-solid coupling analysis of conventional wind turbine.

关 键 词：模态实验 低阶弯振 动网格技术 风轮 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]