基于Xflow风机叶片覆冰数值模拟研究  

Numerical Simulation Analysis of Icing on Fan Blades

作　　者：杨生 钱进[1] 王明惠 朱春晓 YANG Sheng;QIAN Jin;WANG Minghui;ZHU Chunxiao(College of Electrical Engineering,Guizhou University,Guiyang 550025,China;Kaiyang industrial park construction and Development Management Committee,Guiyang 550300,China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025 [2]开阳县工业园区建设开发管理委员会,贵州开阳550300

出　　处：《贵州大学学报（自然科学版）》2021年第2期30-36,共7页Journal of Guizhou University:Natural Sciences

基　　金：贵州省科技支撑计划资助项目(黔科合支撑[2020]2Y040)。

摘　　要：为研究风力发电机叶片覆冰后对其运行性能带来的诸多问题,本文采用格子玻尔兹曼方法-大涡模拟的无网格方法对贵州某1.5 MW大型风力发电场的风机叶片雾凇、雨凇覆冰下的结冰程度、风速及转速对其输出能力的影响进行数值模拟研究,并根据计算结果拟合出一组公式。结果显示:额定风速下雾凇覆冰程度达2%时,与未覆冰(0%)时相比,输出功率和风能利用系数分别减少了5.06%和11.89%;结冰度达20%后其功率和风能利用系数分别降低了26.23%和31.54%;当雨凇覆冰程度达到2%后其输出功率降低16.47%,风能利用系数降达21.29%,10%的雨凇形式覆冰其功率降幅为31.51%,风能利用系数降幅达35.46%;转矩及输出功率均随风速的增加不断上升,结冰度为20%时,其转矩和功率较结冰程度为零时减少了26.23%;转矩、输出功率和风能利用系数均随转速增大而上升,转速为16 r/min时是最佳转矩状态;运行现场根据计算结果拟合的公式获得的覆冰模型,可进行有效的性能预测。In order to study the problems caused by the operation performance of wind turbine blades after icing,this paper adopts the lattice Boltzmann method-large eddy simulation meshless method to analyze the wind turbines of a large 1.5 MW wind farm in Guizhou.The effect of icing degree,wind speed and rotation speed on the output capacity of blade rime and rime icing is studied numerically,and a set of formulas are fitted according to the calculation results.The results show that:when the rime icing degree reaches 2%under the rated wind speed,the output power and the wind energy utilization coefficient are reduced by 5.06%and 11.89%compared with the non-icing(0%);when the icing degree reaches 20%,the output power and the wind energy utilization coefficient are reduced by 26.23%and 31.54%respectively;when the rime icing degree reached 2%,its output power decreased by 16.47%,and the wind energy utilization coefficient dropped to 21.29%.The power reduction rate of 10%rime icing was 31.51%,the wind energy utilization coefficient has dropped by 35.46%;both torque and power continue to rise with the increase of wind speed.When the icing degree is 20%,the torque and power are reduced by 26.23%compared to when the icing degree is zero;The torque,the output power and wind energy utilization coefficient both increase with the increase of speed.When the speed is 16 r/min,it is the best torque state;the icing model obtained by the formula fitted by the calculation result can be used for effective performance prediction.

关 键 词：风机叶片 覆冰 BOLTZMANN方法 大涡模拟 数值模拟 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]