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涡发生器结构对翼型绕流场的影响

李新凯 , 康顺 , 戴丽萍 , 焦建东

工程热物理学报

为了研究涡发生器在风力机叶片上的应用,以进一步提高风力机气动效率,本文采用CFD数值模拟方法,分析涡发生器几何形状对其绕流场和翼型边界层特性的影响.涡发生器几何形状为同样高度的矩形、梯形和三角形.翼型为风力机专用翼型DU97-W-300.首先对数值模拟结果与实验值进行了对比,验证了数值方法的可信性.然后详细讨论了各种涡发生器所产生的集中涡涡量、翼型边界层特性、以及绕流场等沿流向的发展演变.总体上看,三角形涡发生器较适合用于风力机翼型的流动控制.

关键词: 涡发生器 , 翼型 , 绕流场 , 流动控制

DISTRIBUTION OF THE MAGNETIC FIELD AND ITS CONTROL EFFECT ON THE MOLTEN METAL FLOW IN FLOW CONTROL MOLD

G.J. Xu and J.C. He (The Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials , Northeastern University , Shenyang 110006 , China)

金属学报(英文版)

A thermo-simulation experimental continuous caster was established to study the effect of two static magnetic fields imposed the whole width of the mold on the molten metal flow. Low melting point Bi-Pb-Sn alloy and silicon oil were adopted to simulate the molten metal and mold powder respectively. The results show that the control effect of electromagnetic fields on the molten metal flow in the different zones of mold is different. Therefore it is important to study and design new types of magnetic fields to satisfy the request of controlling the molten metal flow in the mold.

关键词: continuous casting mold , null , null

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