(Solved): 3. The hydrofoil shown in Figure 3 is submerged a depth D = 1 m and subject to a free-stream veloc ...

3. The hydrofoil shown in Figure 3 is submerged a depth D = 1 m and subject to a free-stream velocity U = 4 of water. Internal channels fill with water and allow static pressure to transmit from the surface of the hydrofoil through tubes out to a wider U-tube manometer. There is no elevation change between the airfoil and the top of the manometer whose gage fluid has specific gravity SG, = 1.6. The elevation change between 1 and is also considered negligible. (a) Far away from the hydrofoil, what is the (absolute) static pressure P. (in kPa) at oo? (b) What is the (gage) stagnation pressure Pstag.g (in kPa) at D? (c) At 2, what is the non-dimensional velocity v? = ?/U when the manometer reads a height H = 8.5 cm? D (2) Uo Pw (CO) PB IH P P Figure 3: Hydrofoil with pressure leads to a manometer. Pa