Airflow Flashcards
1
Q
Laminar airflow
A
Smooth, streamlined
2
Q
Turbulent airflow
A
Path lines, rough airflow
3
Q
Stagnation point
A
- The point at which all airflow is stopped
- Dynamic pressure is 0, static pressure is high
4
Q
Properties of Ideal fluids
A
- Air is an ideal fluid
- Zero compressibility and viscosity
5
Q
What happens at the converging section of the stream tube?
A
- High static pressure
- Large surface area
- Dynamic pressure starts to increase
6
Q
What happens in the middle of the stream tube?
A
- Small surface area
- Therefore high speed and high dynamic pressure
7
Q
What happens at the diverging section of the stream tube?
A
- Dynamic pressure starts to decrease
- Higher static pressure
8
Q
Equation of continuity
A
- Air mass flow must be the same throughout the stream tube
- Mass cannot be created or destroyed
9
Q
Equation for mass flow
A
Mass flow = Volume x P (density) x v
10
Q
Bernoulli’s principle
A
Static pressure + dynamic pressure = total pressure = CONSTANT
