基于大涡模拟的风力机翼型失速机制探讨  

The Exploration of the Airfoil Stall Mechanism for Wind Turbine Based on LES

作　　者：周姣[1,2] 杨科[1,3,4] 张磊[1,3] 杜建一[1,3,4] 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100190 [3]中国科学院风能利用重点实验室,北京100190 [4]河北省风电叶片工程技术研究中心,河北保定071051

出　　处：《工程热物理学报》2013年第11期2048-2051,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50976117;No.50836006)

摘　　要：本文利用大涡模拟方法,模拟DU93-W-210翼型绕流,发现分离泡对流动的发展和演化具有重要作用.分离泡所住区域是旋涡结构快速生长和湍流脉动快速增大的主要区域,增强了流动的不稳定性.小攻角时分离泡对流动影响较小.随着攻角增大.分离泡的大小和位置对流动的影响增大,尤其是吸力面前缘分离泡的出现,使得流动不稳定性增大.加快厂流动分离的过程,促进了失速的产生.Simulation of the flow field around the DU93-W-210 Airfoil shows that the laminar bubbles attached on the airfoil have an important impact on the development and evolution of the flow field. These bubbles, where the vortex structure grows and turbulent fluctuation increases, enhance the flow instability. The impact of the bubbles is quite small with small angle of attack. When the angle of attack increases, the size and location of the bubbles play a great role on the flow field. Especially, the appearance of the laminar bubbles on leading edge makes the flow field unstable, accelerates the flow separation progress and contributes to the generation of airfoil stall.

关 键 词：大涡模拟 风力机翼型 失速 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]