All Questions
Tagged with vortex aerodynamics
17 questions
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2
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Flow separation in inviscid flow
I watched this video about CFD (
) where flow was assumed to be incompressible and inviscid, but how can vorticies occur behind the ball at the start of the video, shouldn'...
1
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1
answer
125
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How does a shear layer make vortices?
How does a shear layer make vortices? If you have 2 streams of air that are moving at different speeds or opposite directions right beside each other, how would that make a vortex? What causes the ...
- 3,755
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What causes the oscillation in vortex shedding?
When studying this video, I was wondering what actually causes the oscillation? Any source online that I found said that it was from oscillating low pressure zones, but what causes that?
- 3,755
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2
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212
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Why do flat wings create a vortex/vortices?
I've been researching this for the past ~45 minutes, and I still can't find a solid answer. Why do flat wings create a vortex/vortices? In this answer, it says that the detached flow will create a ...
- 3,755
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Does the bending air on a wing create one or multiple vortices?
As explained in the first paragraph of this answer, air will bend inwards on the top of the wing, and outwards on the bottom of the wing. This creates an inward flow component on the top of the wing ...
- 3,755
3
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4
answers
311
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Can wingtip vortices formed around an unswept wing produce vortex lift?
Vortex lift is a kind of aerodynamic lift force due to vortices formed along the leading edge of highly-swept (usually 60 degrees of swept angle or higher) wings at high angles of attack. The "...
- 435
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2
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317
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Do trailing edge vortices exist in reality? [duplicate]
Please don't talk about wing tip vortices and leading edge vortices(vortex lift)
Is it possible to see trailing edge vortices in real life, do they exist in reality?
How looks air in wake between ...
- 1,998
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2
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389
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Why does the leading edge vortex accelerate the flow downward?
I know leading edge vortices over delta wings make more lift. I understood that the core of the vortex sheet is low, so there is suction flow that makes lift. But, I can't understand how a leading ...
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6
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3
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Can gliders and single-engine planes have vortices?
I read,
A third physical explanation of the source of induced drag is that the
wing tip vortices contain a certain amount of rotational kinetic energy. This
energy has to come from somewhere; indeed, ...
- 761
2
votes
1
answer
307
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How do wing tip vortices that interact with the wing surface affect drag?
Often people say vortices are behind the wing so they cannot produce drag, I am not interested in those vortices behind the wing....
I am interested how wing tip vortices which interact with the ...
user53913
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1
answer
410
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Velocity induced by a straight vortex filament
Consider a straight vortex filament as shown below. At each point, there's a point vortex of strength $\it T$. Consider that a point $P$ is there on the outermost circle of flow induced by the vortex ...
- 461
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344
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How does vorticity change the lift coefficient of an airfoil?
For airfoils in unsteady motion, the lift coefficient oscillates and the wake is characterized by vortex shedding.
How does vortex shedding affect the lift coefficient for an airfoil?
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1
answer
3k
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What is the role of a bound vortex?
From what I know the term bound vortex comes from potential flow theory and is a part of circulation around a wing.
Does it mean the same as circulation or lift?
Is it a cause of generating lift over ...
- 2,035
2
votes
2
answers
2k
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Why does the Biot-Savart law give the induced velocity of a infinitesimal segment of a vortex filament at point P?
My question is about the proof of how the Biot-Savart law can be used for vortex filaments. This is what I have in my textbook:
However, I'm not certain how it was derived - I understand that the ...
- 21
1
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1
answer
290
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How do the vortices of a fixed wing and horizontal stabilizer interact? [duplicate]
What interaction of vortices between the fixed wing and horizontal stabilizer?
How do the vortices affect the flow of the horizontal stabilizer upon leaving the wing?
when will the downwash effort ...
- 11
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1
answer
364
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What's the shape and place of the tip vortex in a propeller, depending on propeller sense of turning?
If the propeller vortex is placed and has changing features depending on the propeller sense of turning, both in traction and pusher configuration, knowing about this may have an interest for the ...
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4
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2
answers
2k
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How and why do wake vortices come together to form two tip vortices?
Wake vortices are created all along the wingspan but, the vortices come together to form two tip vortices. How exacly does this happen and why does it? I know that wake vortices push air to the side. ...
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