Homework 4 Solution

Homework 4 Solution - AOE 3104 Homework #4 Solutions...

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Unformatted text preview: AOE 3104 Homework #4 Solutions Problem 1. Consider an airfoil in a 50 m/s air flow at standard sea level conditions. At a point on the airfoil, the pressure is 9 . 5 10 4 Pa. What is the pressure coefficient at this point? (Please use SI units for the result of each step.) Problem 1 Solution. For standard sea level conditions, we have P = 10 . 132 10 4 N / m 2 , = 1 . 226 kg / m 3 Then q = 1 2 V 2 = 1530 Pa . So C p = P- P q = (9 . 5- 10 . 1) 10 4 1532 . 5 =- 4 . 1 Problem 2. Consider an airplane with a wing area of 16m 2 and a wing span of 10m. In a 100 m/s air flow at standard sea level conditions, the wing is generating 80 , 000 N of lift. a) Calculate the lift coefficient. b) Assuming e = 0 . 85, calculate the induced drag coefficient and the induced drag force. (Please use SI units for the result of each step.) Problem 2 Solution. a) q = 1 2 V 2 = 1 2 parenleftBig 1 . 226 kg / m 3 parenrightBig (100 m / s) 2 = 6...
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This homework help was uploaded on 04/06/2008 for the course AOE 3104 taught by Professor Dr.craigwoolsey during the Spring '08 term at Virginia Tech.

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Homework 4 Solution - AOE 3104 Homework #4 Solutions...

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