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冰脊会造成翼型气动性能严重损失。在不同的冰脊形状、弦向位置、冰脊高度和雷诺数条件下,对翼型气动特性进行了数值模拟研究。仿真结果表明:出现冰脊后,翼型的升力系数下降、失速迎角减小且阻力系数增大;冰脊迎风面形状对气动系数的影响比冰脊下游形状的影响更大;冰脊最危险的弦向位置在最小压力区与最大逆压梯度区之间;冰脊越高对翼型气动特性的影响越大,而不同雷诺数下翼型气动特性变化并不明显。
Ice ridges can cause severe loss of airfoil aerodynamic performance. The aerodynamic characteristics of airfoils are numerically simulated under different ice ridge shapes, chordwise positions, ice ridge heights and Reynolds numbers. The simulation results show that the lift coefficient of airfoil decreases, the attack angle of stall decreases and the drag coefficient increases when ice ridges appear. The shape of ice ridge affects the aerodynamic coefficient more than the shape of ice ridges. The dangerous chordwise position is between the minimum pressure zone and the zone of maximum reverse pressure gradient. The higher the icy ridge is, the greater the aerodynamic characteristics of the airfoil are. However, the aerodynamic characteristics of the airfoil at different Reynolds numbers are not obvious.