风力机翼型尾缘厚度对气动噪声的影响Influence of Trailing Edge Thickness on Aero-Acoustic Performance of Wind Turbine Airfoils
曾明伍;孙振业;朱卫军;李松林;
摘要(Abstract):
文章研究不同尾缘厚度对翼型气动噪声的影响.选取DU 93-W-210和DU 97-W-300翼型作为研究对象,采用XFOIL计算翼型的气动数据,并结合半经验模型模拟翼型气动噪声特性.通过改变翼型的尾缘厚度,研究尾缘厚度对气动特性和声压级的影响.结果表明:尾缘增厚对较大厚度的DU 97-W-300翼型升阻比的影响较小,而对较薄的DU93-W-210翼型的影响明显.和较薄翼型相比,较厚翼型的尾缘厚度增加导致的声压级相对变化较大.在一定范围内,尾缘增厚会导致声压级先增加后降低,应严格控制较薄翼型的尾缘厚度;但是在一定范围内增加较厚翼型的尾缘厚度,可以获得较大的结构性能提升而损失较小的升阻比,并获得较低的噪声水平.
关键词(KeyWords): 风力机;气动噪声;翼型;尾缘厚度;钝尾缘
基金项目(Foundation): 四川省科技厅重点研发项目(2019YFG0018);; 国家自然科学基金(11672261;51905469)
作者(Authors): 曾明伍;孙振业;朱卫军;李松林;
DOI: 10.13568/j.cnki.651094.651316.2020.07.09.0001
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