1.南方电网科学研究院有限责任公司 广州;2.贵州电网有限责任公司电力科学研究院 南方电网有限责任公司防冰减灾重点实验室;3.贵州电网有限责任公司电力科学研究院 南方电网有限责任公司防冰减灾重点实验室 贵阳
TM85
南方电网有限责任公司防冰减灾重点实验室 贵州电网公司2022年第一批网级决策科技项目
1.Electric Power Research Institute,China Southern Power Grid;2.Key Laboratory of Ice Prevention&3.Disater Reducing of China Southern Power Grid Co.Ltd, (Electric Power Research Institute of Guizhou Power Grid Co. Ltd;4.Electric Power Research Institute, China Southern Power Grid;5.Key Laboratory of Ice Prevention Disater Reducing of China Southern Power Grid CoLtd,Electric Power Research Institute of Guizhou Power Grid Co Ltd,Guiyang Guizhou
the Science and Technology Project of Key Laboratory of Ice Prevention&Disater Reducing of China Southern Power Grid Co.Ltd.
覆冰是影响风力发电机安全稳定运行的重要因素,建立风力发电机叶片覆冰数值计算模型是实现其覆冰模拟和预测的重要手段。有限元法是当前最常用的方法,但该方法计算量大,效率较低。本文以300kW风力发电机叶片为研究对象,基于剖面分割法对叶片表面水滴碰撞、冻结和覆冰形态变化展开研究,建立了风机叶片多截面气液二相流仿真计算模型,推导了叶片表面水滴局部、整体碰撞系数和冻结系数公式,实现了在较小计算量下对风机叶片表面整体水滴碰冻特性的获取。研究结果表明：风机叶片水滴碰撞系数由叶尖向叶根方向逐渐减小,β1最大值和α1到叶中(0.5 R处)均可降低80%以上。风机叶片覆冰水滴捕获量最大位置位于靠近叶尖的0.8R ~ 0.9R处,而一般覆冰均主要分别在0.5R~ R范围内,水膜溢流作用使风机叶片截面的水滴冻结系数呈现水滴碰撞区域小而溢流区域大的特点,而越靠近风机叶片叶尖的位置覆冰增长过程冰形迭代变化程度越大,覆冰速率线性度也越差。
Ice accretion is a crucial factor affecting the safe and stable operation of wind turbines. Establishing a numerical calculation model for ice accretion on wind turbine blades is an essential means to simulate and predict icing phenomena. While the finite element method is currently the most widely used approach, it involves significant computational complexity and lower efficiency. This study focuses on the blades of a 300 kW wind turbine, employing a sectional segmentation method to investigate water droplet impact, freezing, and ice accretion morphology changes on the blade surface.
