叶片数与弦长配比对垂直轴风力机性能的影响
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摘要
垂直轴风力机的叶片数、弦长和风轮半径是影响其实度的因素。在实度和风轮半径一定的情况下,叶片数和弦长之间存在耦合关系。文章应用CFD仿真方法,从功率系数、力矩系数、涡量等方面分析了在实度保持不变的情况下,叶片数和弦长组合对垂直轴风力机性能的影响。研究表明:当保持实度不变时,不同的叶片数和弦长配比可以影响风力机的性能;通过调整其配比,可在实度不变的情况下,降低力矩波动,获得最优风能利用率。
Factors that affect the solidity of vertical axis wind turbine are blade numbers,chord length and radius of the wind wheel. In case of the certain solidity and radius,there is a coupling relationship between blade numbers and chord length. Based on CFD simulation,fixing the magnitude of rotational radius and solidity,this paper analyzes the impact of different factors on wind turbine among aspects of power coefficient,torque efficient and airfoil vortices respectively. The investigation showed that when keeping a constant solidity,different matching of blade numbers and chord length will affect the performance of the wind turbine. By adjusting the ratio,it can achieve the purpose of reducing the torque fluctuation and the optimum utilization of wind energy without changing the solidity.
Factors that affect the solidity of vertical axis wind turbine are blade numbers,chord length and radius of the wind wheel. In case of the certain solidity and radius,there is a coupling relationship between blade numbers and chord length. Based on CFD simulation,fixing the magnitude of rotational radius and solidity,this paper analyzes the impact of different factors on wind turbine among aspects of power coefficient,torque efficient and airfoil vortices respectively. The investigation showed that when keeping a constant solidity,different matching of blade numbers and chord length will affect the performance of the wind turbine. By adjusting the ratio,it can achieve the purpose of reducing the torque fluctuation and the optimum utilization of wind energy without changing the solidity.
引文
[1]Vaughn Nelson.风能——可再生能源与环境[M].北京:人民邮电出版社,2010.[1]Vaughn Nelson.Wind Energy Renewable Energy and Environment[M].Beijing:Posts&Telecom Press,2010.
[2]李岩.垂直轴风力机技术讲座(四)升力型垂直轴风力机相关理论[J].可再生能源,2009,29(4):121-123.[2]Li Yan.Vertical axis wind turbine technology lectures(4)Theory of lift type vertical axis wind turbine[J].Renewable Energy Resources,2009,29(4):121-123.
[3]Okeoghene Eboibi,Louis Angelo,M Danao,et al.Experimental investigation of the influence of solidity on the performance and flow field aerodynamics of vertical axis wind turbines at low reynolds numbers[J].Renewable Energy,2016,92:474-483.
[4]Qing'an Li,Takao Maeda,Yasunari Kamada,et al.Effect of solidity on aerodynamic forces around straight-bladed vertical axis wind turbine by wind tunnel experiments(Depending on number of blades)[J].Renewable Energy,2016,96:928-939.
[5]张建新,蔡新,潘盼.H型垂直轴风力机启动性能分析[J].水电能源科学,2013(5):243-246.[5]Zhang Jianxin,Cai Xin,Pan Pan.Analysis of start-up performance of H-shaped vertical-axis wind turbine[J].Water Resources and Power,2013(5):243-246.
[6]冯潇涛,邓飞,王佳,等.实度对H型垂直轴风机转速影响的试验研究[J].机械与电子,2013(1):7-9.[6]Feng Xiaotao,Deng Fei,Wang Jia,et al.Influence of solidity on the H-type VAWT's rotate speed[J].Machinery&Electronics,2013(1):7-9.
[7]丁国奇,李岩,王绍龙,等.实度对垂直轴风力机性能影响的风洞试验[J].可再生能源,2013,31(9):58-62.[7]Din g Guoqi,Li Yan,Wang Shaolong,et al.Wind tunnel test on effects of solidity on performance of vertical axis wind turbine[J].Renewable Energy Resources,2013,31(9):58-62.
[8]张立勋,梁迎彬,李二肖,等.实度对直叶片垂直轴风力机风轮气动性能的影响分析[J].农业机械学报,2013,44(5):169-174.[8]Zhang Lixun,Liang Yingbin,Li Erxiao,et al.Effects analysis of solidity on aerodynamic performance of straight-bladed vertical axis wind turbine[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(5):169-174.
[9]Fiedler A,Tullis S.Blade offset and pitch effects on a high solidity vertical axis wind turbine[J].Wind Engineering,2009,33(3):237-246.
[10]Howell R,Qin N,Edwards J,et al.Wind tunnel and numerical study of a small vertical axis wind turbine[J].Renewable Energy,2010,35(2):412-422.
[2]李岩.垂直轴风力机技术讲座(四)升力型垂直轴风力机相关理论[J].可再生能源,2009,29(4):121-123.[2]Li Yan.Vertical axis wind turbine technology lectures(4)Theory of lift type vertical axis wind turbine[J].Renewable Energy Resources,2009,29(4):121-123.
[3]Okeoghene Eboibi,Louis Angelo,M Danao,et al.Experimental investigation of the influence of solidity on the performance and flow field aerodynamics of vertical axis wind turbines at low reynolds numbers[J].Renewable Energy,2016,92:474-483.
[4]Qing'an Li,Takao Maeda,Yasunari Kamada,et al.Effect of solidity on aerodynamic forces around straight-bladed vertical axis wind turbine by wind tunnel experiments(Depending on number of blades)[J].Renewable Energy,2016,96:928-939.
[5]张建新,蔡新,潘盼.H型垂直轴风力机启动性能分析[J].水电能源科学,2013(5):243-246.[5]Zhang Jianxin,Cai Xin,Pan Pan.Analysis of start-up performance of H-shaped vertical-axis wind turbine[J].Water Resources and Power,2013(5):243-246.
[6]冯潇涛,邓飞,王佳,等.实度对H型垂直轴风机转速影响的试验研究[J].机械与电子,2013(1):7-9.[6]Feng Xiaotao,Deng Fei,Wang Jia,et al.Influence of solidity on the H-type VAWT's rotate speed[J].Machinery&Electronics,2013(1):7-9.
[7]丁国奇,李岩,王绍龙,等.实度对垂直轴风力机性能影响的风洞试验[J].可再生能源,2013,31(9):58-62.[7]Din g Guoqi,Li Yan,Wang Shaolong,et al.Wind tunnel test on effects of solidity on performance of vertical axis wind turbine[J].Renewable Energy Resources,2013,31(9):58-62.
[8]张立勋,梁迎彬,李二肖,等.实度对直叶片垂直轴风力机风轮气动性能的影响分析[J].农业机械学报,2013,44(5):169-174.[8]Zhang Lixun,Liang Yingbin,Li Erxiao,et al.Effects analysis of solidity on aerodynamic performance of straight-bladed vertical axis wind turbine[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(5):169-174.
[9]Fiedler A,Tullis S.Blade offset and pitch effects on a high solidity vertical axis wind turbine[J].Wind Engineering,2009,33(3):237-246.
[10]Howell R,Qin N,Edwards J,et al.Wind tunnel and numerical study of a small vertical axis wind turbine[J].Renewable Energy,2010,35(2):412-422.