This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
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...
View
Full
Document
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.
 Spring '08
 DR.CRAIGWOOLSEY

Click to edit the document details