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计及动态失速和有限展弦比的立轴风力机气动分析
引用本文:刘占芳,颜世军,张 凯,邓智春.计及动态失速和有限展弦比的立轴风力机气动分析[J].农业机械学报,2011,42(2):120-125.
作者姓名:刘占芳  颜世军  张 凯  邓智春
作者单位:重庆大学资源及环境科学学院,重庆,400044
基金项目:重庆市科技攻关计划资助项目(CSTC2008AC3105)
摘    要:结合Darrieus立轴风力机运行时叶片非定常气动特性,对B-L动态失速模型进行了适当修正。考虑叶片有限展弦比效应和叶尖气动损失,修正了等截面叶片的气动性能。基于DMST气动评价方法,给出了考虑动态失速和有限展弦比效应的Darrieus立轴风力机气动性能计算模型。对Sandia实验室17m风力机进行了气动评价,分析了动态失速与有限展弦比对叶片气动特性的影响,与实测的功率和功率系数的对比表明,该模型能较好地预测Darrieus立轴风力机的气动性能。

关 键 词:立轴风力机  气动性能  双向多流管模型  动态失速  有限展弦比

Aerodynamic Performance Prediction for Darrieus Wind Turbine in View of Dynamic Stall and Finite Aspect Ratio Effects
Liu Zhanfang,Yan Shijun,Zhang Kai and Deng Zhichun.Aerodynamic Performance Prediction for Darrieus Wind Turbine in View of Dynamic Stall and Finite Aspect Ratio Effects[J].Transactions of the Chinese Society of Agricultural Machinery,2011,42(2):120-125.
Authors:Liu Zhanfang  Yan Shijun  Zhang Kai and Deng Zhichun
Institution:Chongqing University;Chongqing University;Chongqing University;Chongqing University
Abstract:Considering the unsteady aerodynamic characteristics of the vertical axis wind turbine (VAWT) blade at low speed ratios, the B-L dynamic stall model was modified. The finite aspect ratio effects and blade tip loss were taken into account to modify the aerodynamic characteristics for constant chord blade. Based on the double-multiple stream tube method (DMST) in aerodynamic analysis, an improved aerodynamic performance prediction model for VAWT was developed combining with the dynamic stall model and predicting method for the effects of finite aspect ratio. The aerodynamic performance of 17m VAWT by Sandia National Laboratory was calculated. The effects of the dynamic stall and finite aspect ratios were analyzed, and the rotor power and power coefficients were compared and analyzed between the test and evaluation results. Feasibility of the prediction model to evaluate the aerodynamic performance for VAWT was proved.
Keywords:Vertical axis wind tubine  Aerodynamic evaluation  Double-multiple stream tube method  Dynamic stall  Finite aspect ratio
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