8.2 Aerodynamics Flashcards
Where is air incompressible?
Air is incompressible in the subsonic region
If no disturbance how do air streamlines flow?
Parallel to each other if there is no disturbance.
What happens to streamlines as the diameter gets smaller
The streamlines move closer to each other.
What is the continuity equation?
V1 A1 = V2 A2
What is constant in airflow?
Density is constant
What is a diffuser outlet?
Diffuser outlet when the diameter increases and the speed decreases
What is jet outlet?
Jet outlet when the diameter decreases and the speed increases.
What is Bernoulli’s principle?
The Bernoulli equation states that total pressure is always the sum of static pressure and dynamic pressure, or in short hand notation, P tot. equals p plus q.
The total pressure remains constant.
When a valve is closed what is true about static and dynamic pressure?
Static pressure = Total Pressure
How do we measure the static and dynamic pressure when we have a speed.
Measure Total pressure at Inlet - Static Pressure at static port.
If speed increases by four times, and density is constant. What will happens to dynamic pressure?
The dynamic pressure increases sixteen times
What does IAS stand for?
Indicated air speed
What is true about the point of stagnation?
Velocity = 0
No dynamic pressure
Where would you find downwash?
Trailing -Edge or downwards flow
What is the Magnus Effect?
Mechanically induced circulation of an object
