1. Lecture #6 Ehsan Roohi Sharif University of Technology Aerospace Engineering Department 1

2. 2 Wind Tunnel Pressure Coefficient

3. 3

4. 4

5. 5

6. 6

7. 7 The kinetic energy per unit volume is called dynamic pressure q The pressure energy per unit volume (due to random motion within the fluid) is the static pressure of the fluid and is given the symbol p The constant energy per unit volume is called the total pressure pt. Bernoulli's equation reduces to Dynamic pressure + Static pressure = Total pressure (7) For rotational flow the total pressure pt is constant along a streamline but may vary from streamline to streamline. HW: Read wiki page about Bernoulli equation and write a 2 pages report about different versions of this equation.

8. 8

9. 9

10. 10 Wind Tunnel

11. 11

12. 12

13. 13

14. 14

15. 15

16. 16

17. 17 C p depends on Reynolds Number and body shape

18. 18

19. 19 Boundary Conditions

20. 20 HW’s Chapter 3: P. 1-7 In four weeks