| 翼型凹变对风轮旋转噪声影响特性分析 |
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| 引用本文： | 吕文春,汪建文,段亚范,马剑龙,孟克其劳,陈金霞.翼型凹变对风轮旋转噪声影响特性分析[J].振动与冲击,2021(1):45-51,85. |
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| 作者姓名： | 吕文春 汪建文 段亚范 马剑龙 孟克其劳 陈金霞 |
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| 作者单位： | 内蒙古工业大学能源与动力工程学院;内蒙古机电职业技术学院科技与职教研究中心;内蒙古自治区高等学校可再生能源工程研究中心;风能太阳能利用技术教育部重点实验室 |
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| 基金项目： | 国家自然科学基金(51766014,51966014);内蒙古自然科学基金(2016ZD04,2019MS05021);内蒙古自治区高等学校科学研究项目(NJZY19270)。 |
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| 摘 要： | 针对某分布式小型风力机叶片,为了探究翼型凹变后对风轮旋转噪声的影响效果,利用60通道声阵列系统对凹变叶片和原叶片风轮进行旋转噪声采集,并通过探究翼型凹变对风轮结构动态响应的影响,解析了翼型凹变造成风轮旋转噪声降低的原因.结果表明,翼型凹变可以有效地提高叶片的固有频率和阻尼比,提升了叶片的刚度,有效地减弱了叶片对周围流体...
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| 关 键 词： | 翼型凹变 刚度 旋转噪声 声压级 |
Effects of airfoil concave change on rotating noise of wind turbine |
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| Affiliation: | (School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Research Center of Technology and Vocational Education,Inner Mongolia Technical College of Mechanics and Electrics,Hohhot 010070,China;Engineering Research Center of Renewable Energy at Universities of Inner Mongolia Autonomous Region,Hohhot 010051,China;Key Laboratory of Wind Energy and Solar Energy Technology,Ministry of Education,Hohhot 010051,China) |
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| Abstract: | For a distributed small wind turbine blade,in order to explore effects of airfoil concave change on rotating noise of wind turbine,a 60-channel acoustic array system was used to collect rotating noise of concave variable blade and original blade wind wheels,and through exploring effects of airfoil concave change on dynamic response of wind wheel structure,the reason of wind wheel’s rotating noise reduction caused by airfoil concave change was analyzed.Results showed that airfoil concave change can effectively improve natural frequency and damping ratio of blade,enhance blade stiffness,effectively reduce blade’s expansion and contraction action on the surrounding fluid,and thus reduce rotating noise of wind turbine;the sensitivity of airfoil concave change to the influence of different frequency-doubling harmonic sound pressure levels of rotating noise is different,the sensitivity increases with increase in frequency-doubling times;the related study results provide new idea and solution scheme for reducing rotating noise of wind turbine. |
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| Keywords: | airfoil concave change stiffness rotating noise sound pressure level |
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