翼型
失速(流体力学)
计算流体力学
后缘
纵轴
Lift(数据挖掘)
风力发电
前沿
阻力
机械
升阻比
垂直轴风力涡轮机
叶尖速比
海洋工程
空气动力学
环境科学
航空航天工程
材料科学
物理
工程类
涡轮机
计算机科学
电气工程
数据挖掘
工程制图
出处
期刊:Energy
[Elsevier]
日期:2020-06-01
卷期号:201: 117659-117659
被引量:33
标识
DOI:10.1016/j.energy.2020.117659
摘要
Recent studies have revealed that passive leading-edge slots on the pressure side has the potential to increase both the peak and overall CL/CD of airfoils and may possess an advantage over active methods. This work pursues application of such novel slots to the modern DU12W262 airfoil with a flexible slot-shape parametrization coupled with an optimizer to allow other slot concepts as well (suction side and trailing edge slots). Experimentally validated Computational Fluid Dynamics (CFD) simulations are employed for this purpose. It is shown that 16% peak CL/CD improvement and overall α-CL/CD rise are observed without any penalty in stall range. Implications of these are demonstrated on Horizontal- and Vertical-Axis Wind Turbines (HAWT and VAWT) by CFD. It is shown that, HAWT peak Cp of increases by 3.2%. Alternative BEM simulations predict this as high as 7.5%. For the VAWT, the peak Cp remains unchanged, however high tip-speed-ratio (λ > 3, low wind speed) Cp increases between 3.5 and 9.6% throughout the operational range. This may directly reflect into VAWT urban operation. In summary, the concept is highly successful in improving peak and overall CL/CD of a modern airfoil, and this yields to significant enhancements in both HAWTs and VAWTs.
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