Problem #1: Velocity profiles are measured at the upstream end (surface 1) and at the downstream end (surface 2) of the control volume shown in Fig 1. Surfaces 3 and 4 are streamlines. If the flow is incompressible, two dimensional, and steady what is the drag coefficient for the airfoil? The vertical dimension HD - 0.025c. The pressure is p. (a constant) over the entire surface of the control volume. HU Fig. 1 -Streamline Hp-0.025c u-U-(1-05 cos) 2Hp Streamline