POF - 3D Flow Flashcards
What are the two factors that influence Span-wise Flow?
- The air mass flow.
2. The pressure differential.
If the speed increases, what happens to the tip vortex intensity?
The tip vortex intensity reduces.
If the wing aspect ratio increases, what happens to the tip vortex intensity?
The tip vortex intensity will reduce.
If the amount of lift reduces, what happens to the tip vortex intensity?
The tip vortex intensity reduces.
When can a tip vortex form?
Only when the wing is producing lift.
On the upper straight wing surface in relations to Spanwise Flow, what is the pressure gradient?
It is high pressure at the wing tip which goes to a low pressure at the wing root.
At the lower straight wing surface in relations to Spanwise Flow, what is the pressure gradient?
It goes from High pressure at the wing root to Low pressure at the wing tip.
What do trailing vortices produce?
- Downwash.
- Drag.
- Wake Turbulence.
If the angle of attack is high, what is the magnitude of the wing tip vortices?
The magnitude of the wing tip vortices are high when the AOA is high.
What is the induced angle of attack responsible for?
It is responsible for drag.
What is the effective angle of attack responsible for?
It is responsible for the lift.
What is the RAF?
It is the relative air flow, and it is the direction of the relative airflow to the aeroplane.
What is the EAF?
It is the Effective Airflow, and it is the direction of the effective airflow to the wings.
