基于翼型粗糙容忍度,采用三维建模方法模拟分布式粗糙元,代替传统粗糙带,并利用3D打印技术打印粗糙前缘模型。通过风洞测试,得到前缘粗糙的18%厚度风力机翼型气动性能数据。测试结果表明,随着雷诺数的增加,翼型的升力系数增加。前缘粗糙会导致翼型的最大升力系数减小,阻力系数上升,最大升阻比减小,失速攻角提前。同时,相同粗糙水平下,相较于前缘凸起,前缘凹坑粗糙方式对风力机翼型气动性能影响较小。
Abstract
Based on the roughness tolerance of airfoil, the distributed roughness element was simulated by 3D modeling method to replace the traditional rough band, and the roughness model was printed by 3D printing technology. Through wind tunnel test, the aerodynamic performance of 18% thickness airfoil with rough leading edge was obtained. The test results proved that the lift coefficients improved with the increase of Reynolds numbers. Rough leading edge leads to lower maximum lift coefficient, higher drag coefficient, lower maximum lift-drag ratio, and earlier stall angle of attack. Meanwhile, compared with the leading edge bump, the leading edge pit roughness has less influence on the aerodynamic performance of the wind turbine airfoil.
关键词
粗糙度 /
风洞 /
雷诺数 /
3D打印 /
凹坑 /
凸起
Key words
roughness /
wind tunnel /
Reynolds number /
3D printing /
pit /
bump
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基金
国家重点研发计划（2019YFB1503700）
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