Apparatus and Procedure

Apparatus and Procedure - Apparatus and Procedure A NACA...

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Apparatus and Procedure A NACA 0012 wing was used with two end caps so that the flow could be examined as two-dimensional flow inside of a wind tunnel in the basement of the W. R. Woolrich . First the temperature and barometric pressure were taken to find the density o the air. The wind tunnel used is powered by a 75hp Westinghouse motor with a magnetic clutch. This powers a propeller with a diameter of 1.524 m, which produce the wind in the tunnel. For Flow visualizations, the smoke wire (Fig.1) was used at slower speeds. It produces smoke by oil flowing over a hot wire. While varying the angle of attack from 0 to 20 degrees in increments of 5 degrees at approximately 3.048 m/s, it was observed that the stagnation point moved further back along side the bottom of the airfoil as the angle increased, also that the point of flow separation moved toward the leading edge as the angle increased. When the angle of attack is great enough, flow is separated early and stalling is observed. During this flow reversal is also observed.
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Apparatus and Procedure - Apparatus and Procedure A NACA...

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