Installing tandem lift wings on a Maglev train can reduce the net weight of the train and make it consume less energy.However,the arrangement of the tandem lift wings is greatly restricted by the constraints of the railroad limits and other devices on the roof of the train.In order to improve the aerodynamic perform-ance of the lift wing,six commonly used low-speed large-lift wing airfoils suitable for high-speed maglev trains are designed,and their aerodynamic performance is numerically simulated,the influence of the airfoil type on the performance parameters such as lift,lift coefficient,and lift-to-drag ratio is explored,and the in-fluence of the structural parameters such as the spreading chord ratio of the lift wing,the heel-to-toe ratio,and the attack angle on the aerodynamic performance of the lift wing is analyzed.The results indicate that the lift-resistance of a two-dimensional airfoil is increased with the increase of the angle of attack,while the lift-drag ratio decrease with the increase of the angle of attack.Under the same working condition,the wing type NACA BR 63-55-12 has the perfect lift-drag ratio,and the drag ratio of the angle of attack of 4° is about 18,which is very suitable for two-dimensional airfoils of train lifting wings.When the spread is fixed value,the lifting wing with a heel ratio of 1 and a chord ratio of 3.5 has a higher lift.The lift-to-drag ratio reaches the maximum value of 18.8 when the angle of attack is increased to 3° and then decreased gradually.
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