Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions about the vortices that form at the wingtips of aircraft due to air flow and pressure differentials.

0
votes
0answers
34 views

Models/equations for wingtip vortices/wake turbulence [closed]

I'm wondering if anyone knows any good physical models of how vortices created by wingtips behave? I've done some research on the subject but have not really found anything concrete. I'm interested in ...
0
votes
0answers
218 views

Why don't more airplanes incorporate spiroid winglets? [duplicate]

In typical airplanes, lift induced drag can account for the majority of the overall drag. Why don't more aircraft employ methods to reduce this and specifically why not spiroid winglets? From every ...
1
vote
0answers
36 views

Vortex Lattice Method with eliptical panels

I implemented vortex lattice method (or deeper here) into my aircraft simulation program. The problem is that sometimes trailing vortex filaments from Horse Shoe Vortexes of main wing hits panels of ...
1
vote
2answers
109 views

Does a vortex/wake turbulence reach ground level nearby?

Where I live not many houses are built under the immediate approach/takeoff line of airports. Instead, they use the area for, say, sports fields. Is it possible, in otherwise no-wind conditions, for ...
0
votes
1answer
129 views

Spanwise flow and wingtip vortices in forward-swept wings

One of the benefits of forward-swept wing is that spanwise flow direction is from tip to root. However, in this answer an X-29 has quite significant sweep angle, at which drawbacks such as ...
0
votes
0answers
216 views

Is the Embraer E190-E2 equipped with raked wingtips?

It looks like the Embraer E190-E2 has a raked wingtip, but isn't a raked wingtip only efficient for long-haul aircraft like the Boeing 77W?
5
votes
3answers
228 views

Do wingtip vortices really only form when airplane wheels are separated from the ground?

My GA theory textbook (which covers fixed wing up to and including EASA PPL) has some suggestions on taking off and landing light aircraft soon after large aircraft (besides avoiding it, if possible), ...
0
votes
1answer
300 views

Why don't airbus aircraft have raked wingtips? [duplicate]

Most airbus aircraft have sharkfin winglets or blended winglets. Why is it that none of them have raked wingtips like the 777-300ER?
3
votes
2answers
246 views

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. ...
3
votes
3answers
360 views

How do wing tip vortices interact with the airflow on an wing with winglets?

If winglets are added to an aircraft, do the vortices still interact with the airflow and create up wash and down wash. If the vortices do interact with the rest of the flow I am wondering how they do ...
1
vote
0answers
171 views

How does downwash bend airflow down? How can wing-tip vortices reach the airflow in front of the wing? [duplicate]

Wing-tip vortices only start occurring when the pressure difference on the two sides of the wing starts. Wouldn't this mean that by the time the downwash from the vortices is acting on the airflow it ...
6
votes
3answers
614 views

Is induced drag caused because of the tilt of the wing backwards?

In this question: Why is induced drag less on a high span wing? In the answer it was stated that wing tip vortices do not cause induced drag. If this is the case then what causes the induced drag. ...
17
votes
4answers
2k views

Why does a clean configuration lead to the generation of greater wingtip vortices?

"Slow, heavy, clean" are the three major conditions generating stronger wing vortices. It's very clear how "slow and heavy" aircraft create stronger vortices, but why a "clean" configuration generates ...
7
votes
1answer
2k views

How do Hoerner Wingtips work?

I was just reading up about different methods of reducing drag through the different wingtip designs when I come across Hoerner Wingtips. So after some research, I have two questions. According to ...
1
vote
1answer
964 views

How can I calculate effective wingspan of a high aspect ratio model airplane?

I've heard of people talking of wingspan and effective wingspan. Considering: L = Lift Coefficient . 1/2 Rho . Velocity ^ 2 . Surface Area, I understand that tip ...
3
votes
2answers
470 views

What is the relationship between angle of attack and wake turbulence?

It is said that when the preceding airplane is heavy, clean, and slow, wake turbulence is much hazardous due to greater angle of attack is requried. However, why does increasing angle of attack result ...
3
votes
2answers
255 views

How does the adiabatic cooling of wingtip vortices work?

This question on condensation and wingtip vortices, What is the mechanism by which condensation forms above wings?, attributes the reduction in temperature found in wingtip vortices to Adiabatic ...
5
votes
1answer
801 views

Why is a wing tip's front edge tapered?

I am beginner and I want to understand the advantage of a tapered wing tip front edge beyond reducing the mass. How does this minimize or effect vortex drag, etc. Can someone help me to visualize this ...
4
votes
0answers
376 views

What is the best combination of airfoil shape for flight in ground effect over water?

What is the best airfoil shape for flight in ground effect over water?
6
votes
2answers
396 views

Does a strobe light shield act like a wingtip fence [or better sort of vortex generator]?

I was told it is a shield to avoid to blind the pilot during night flights when the strobes are on. Now, knowing the primary reason is, as far as I know, the above mentioned: Does anyone know any ...
4
votes
1answer
492 views

Can wing-tip vortices be reduced/eliminated with a rear-facing propeller near the wing-tip?

Let's say we have a propeller-driven aircraft in the pusher configuration (rear-facing propellers). If we could somehow put an engine at the wing tip (ignoring structural concerns), and maybe make the ...
-3
votes
1answer
172 views

Design winglets to counteract tip vortex [closed]

I want to know the effect of the wingtip vortex to design a winglet (or a wing horizontal extension) to counteract* this effect. How could I calculate the momentum produced by the tip vortex, in ...
6
votes
2answers
3k views

Why does the vortex created by wing affects its own angle of attack?

According to potential flow theory, we know that the lift generated by the wings is due to the vortex it creates. In case of a 3D finite wing, there is also a span wise flow due to tip leakage from ...
2
votes
2answers
238 views

Can an aircraft or helicopter run into its own wake vortex?

I was recently flying my rc helicopter and I would sometimes turn it around and move it forward and sometimes I lost control of the helicopter while doing that a few times and crashed it everywhere (...
7
votes
1answer
408 views

Do vertical stabilizers create vortices like wingtips do?

On a wing, a wing tip vortex is unavoidable no matter what configuration you use, but does a vertical stabilizer form a wing tip vortex? I noticed this picture and saw two vortices coming off of the ...
10
votes
2answers
654 views

How “powerful” is a wing tip vortex?

I know that aircraft generate wake turbulence and wingtip vortices, and the strength of those phenomena are related to the size of the aircraft, but how powerful are wingtip vortices in terms a non-...
3
votes
2answers
4k views

How could it be possible to fully prevent wing tip vortex formation? [duplicate]

I know that winglets and swept wings are ways to reduce the vortex that are currently in use on many aircraft. Are there any aircraft design concepts out there that completely eliminate the vortex ...
4
votes
0answers
101 views

Is the wingtip fence as effective as the winglet? [duplicate]

My guess would be no because it does not reflect the air as well.Wingtip fence Winglet What I am basically asking is does the wing tip fence have the same amount of drag reduction (wing tip vortex) ...
9
votes
3answers
3k views

Why do wing tip vortices tend to be most dangerous when there is a light quartering tailwind?

I understand how wing tip vortices be effected under a headwind or crosswind. However, what are the differences in effect between tailwind and light quartering tailwind? Why is it most dangerous ...