Lecture #6

Ehsan RoohiSharif University of Technology

Aerospace Engineering Department

1

2

Wind Tunnel

Pressure Coefficient

3

4

5

6

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

9

10

Wind Tunnel

11

12

13

14

15

16

17

Cp depends on Reynolds Number and body shape

18

19

Boundary Conditions

20

HW’sChapter 3: P. 1-7In four weeks