Questions tagged [vortex-generators]

For questions about vortex generators, a type of high-lift device that curls the airflow over a wing up into many small vortices that cling to the wing's surface, inhibiting airflow separation at high angles of attack.

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8
votes
2answers
262 views

Are there any aircraft with retractable vortex generators?

From this answer, “Of course, these also add drag, even when the wing is not stalling, so they are only added where needed”. Are there any aircraft that have vortex generators that are retractable so ...
4
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2answers
201 views

Do vortex generators increase Re of a wing?

Do vortex generators (VGs) increase Re of a wing? I understand that VGs re-energize the boundary layer on a wing. I understand it turns laminar flow into attached turbulent flow. Doesn't that mean ...
0
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0answers
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What happens when you add a vortex generator to high camber LAMINAR wing?

What happens when you add a vortex generator (not trip strip) to a high lift or laminar wing, operating say at 500k to 1,000k Re? I understand vortex generators add a little less lift than a slat on ...
3
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2answers
169 views

Could vortex generators be used to preserve aileron authority during a stall?

I know that using aileron input in the approach to a stall is generally inadvisable; what if vortex generators are placed at the wingtip (where the ailerons sit), meaning that the ailerons will still ...
13
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4answers
4k views

What is the aerodynamic motivation behind vortex generators?

An airplane's wing creates lift efficiently when the airflow is parallel to the chord of the wing. Vortex generators twist the airstream on the wing surface. Doesn't this kind of twisted airflow ...
6
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3answers
2k views

What are the disadvantages of having vortex generators?

I know the advantages of vortex generators (VGs): lower stall speed, lower landing and takeoff speed according to www.stolspeed.com. So what are the major reasons most GA planes and low speed ...
5
votes
1answer
2k views

What is the difference between a stall fence and a vortex generator?

Both of them prevent the aircraft from stalling, so is there any difference between them? The wing fence doesn't produce a vortex, so how does it work?
14
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2answers
1k views

Why do most GA aircraft not have vortex generators?

It is my understanding that vortex generators produce more favorable aerodynamics by delaying flow separation. If this is the case, why do more GA aircraft not have vortex generators?
18
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3answers
29k views

What is a vortex generator?

I saw a vortex generator mentioned in an aircraft listing. What is a vortex generator?
10
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2answers
3k views

How does the position of vortex generators on engine cowlings affect flight?

I know what vortex generators (VGs) do. My question is: How come some aircraft have VGs on both sides of the engine, whereas other aircraft have them on the inside only? For example, in this picture ...