摘要
弯度对提高翼型性能具有显著的影响。基于工程上广泛应用的标准k-ε模型,对不同弯度的翼型进行数值模拟。数值计算结果表明,随着弯度增加翼型的升阻力均增加,但升力系数增加程度逐渐减小,最佳升阻比先增大后又呈减小趋势;弯度增加升力增大,翼型吸力面的最低压力减小,但不能使其低于流体的汽化压力。
Airfoil＇s Camber has significant impact on its performance. Based on the standard k-ε model which is widely used in engineering, the airfoils of different cambers are simulated. The numerical results show that both lift and drag force increase as the airfoil ＂s camber increases. However, the increasing extent of lift coefficient decreases gradually. Best lift-to-drag ratio increases first, then the trend is decreasing. As the airfoils camber increases, the minimum pressure of airfoil suction surface decreases, but the pressure is not below the fluid＇s vaporization-pressure.
出处
《中国农村水利水电》
北大核心
2008年第9期128-130,133,共4页
China Rural Water and Hydropower
关键词
翼型弯度
最佳升阻比
数值模拟
airfoil＇s camber
best lift-to-drag ratio
numerical simulation
