Wing tip vortices behind the wing - Wakesheet

This demonstrates the wing tip vortices behind a wing that is moving with a steady velocity, result of a steady panel code.

Category:

Film & Animation

Tags:

• steady
• panel
• code

[LTF85199]

Hey divahar 2 questions if you dont mind:

1) why are most airplane wing are bend upward at a small angle? Is it for dynamic stability?

2)why are the crossection area of most wings smaller towards the ending tips for reduction in vortecies?

[jdivahar]

1) why are most airplane wing are bend upward at a small angle? Is it for dynamic stability?

It is for LATERAL(roll) static stability (trying to come back to its original position)

2)why are the crossection area of most wings smaller towards the ending tips for reduction in vortecies?

Tapering the wing planform towards the tip is to achieve the lift distribution close to elliptical distribution along span for which the induced drag is minimum.

Thanks for your interest.

[LTF85199]

One question, how does this effect create drag, I know it creates drag but how?

[jdivahar]

Because of the Tip vortices, there will be a strong downwash, and so the local velocity and lift will also will titled so that a component will be parallel to freestream that is called "induced drag". "Induced drag" just means "LIFT INDUCED DRAG", that is no lift, no tip vortices, no induced drag.

Thanks for your interest.

[GreenAce92]

Could you import any shape into there say a gull wing flying wing?

I wanted a visual reference of how my plane flies straight without vertical stabilizers

[LTF85199]

@sameer161 thank you, you got me thinking there for a bit.... I think the picture is getting more clear now..

[sameer161]

@LTF85199 : There is high pressure air below and low pressure air above the wing . There is tendency of the air to move to low presuure area above the wing . thus some airpressure spills on the top of the wing causing eddies . These eddies are formed at the wing tip and generate " vortices " . These vortices causes increase upwash and down wash which pushes the lift slightly backwards rather then upwards . This causes a additional drag known to us as Induced drag . .

[arias1772]

awesome video but wouldn't roll stability be considered longitudinal stability? lateral is pitch and vertical is yaw

[e2kk]

very useful demonstration

[kovamaniac]

Well done.

I am studying Aeronautics at Patras,Greece and this is a wonderful video.

[LTF85199]

Thankyou soo much well explined i am an aerospace student!