공기 유속과 저항체 형태에 따른 압력계수 측정에 관한 풍동 실험

Wind tunnel experiment for measurement of pressure coefficient with air-flow velocity and the shape of resistant objects

In the wind tunnel circular cylinder and airfoil models were provided in order to measure the relative head differences at the various air-flow velocity.The results of this study were as follows:⑴ The pressure coefficients of circular cylinder model were shown qualitatively similar distribution, not influenced greatly by air-flow velocity in the fluid-flow field. ⑵ When angle of attack α is 0°, the pressure coefficients of the airfoil model were not shown large difference at the air-flow velocity, but in general, they were increased as the air-flow velocity was increased. In addition, the pressure coefficients were shown qualitatively similar distribution in all velocities. ⑶ The airfoil model has had smaller change in pressure coefficient than the circular cylinder model. ⑷ The pressure coefficient of the airfoil model based on the angle of attack α has had remarkable difference in increase and decrease as X/C has been getting smaller.