Currently in PSI, for my TIPE I am working on the effect of winglets on a wing. So I modeled this wing on Solidworks and had the drag and lift measured but several questions come to me:
1) when I ask him for the lift he gives it a max value of 0.9N and an average value of 0.008n // for the drag max = 0.17N and avg = 0.008N. Where does this difference between the max and the min come from? Does it make more sense to take the max or the min?
2) Is it possible to have access to the equations that SolidWorks uses?
3) when I ask him to draw the streamlines, he suggests that I draw the streamlines of the vortices/s; What does this mean? Is it possible to know how he calculates this?
1°) It is important to know that the winglets have the function of reducing turbulence and drag. Thus, if the A380 did not have one, turbulence would destroy any aircraft in its wake. In fact, it removes the vortex (more precisely, channels the ai to avoid the vortex)
2°) For your 1° you don't say if your simu is on the whole wing or only on the Winglet with a wing stump. The winglet cannot have significant lift already because it is vertically oriented and does not have an extrado which provides more than 70% of the lift.
3°) The answer to your 2nd answer is no because the code is buried deep in the SW simu code which surely includes several hundred thousand lines of compiled code :-)
4°) It is not possible to know how he calculates. For the whirlwinds, I can't say why he offers this, you would have to see photos of your screens.
1) I stated my subject clumsily, my subject is not exactly the impact of winglets on a wing, but of course the impact of winglets on the trail of the Winglets.
2) For the simu I'm talking about, it's done on a normal kite, i.e. without winglets, and on the entire surface.
3) for the whirlwinds, I would try to take screenshots tonight, not having a PC with me today
- your laminar flow is not thick enough because you only generate a mini flow which means that some lines that should be in extrado go to intrado (and you can't see anything on the extrado there). Normally you should have a flow thick enough to have two thirds in extrado and one third in intrado.
- The second is that you are still talking about winglets. Even if you don't put a winglet on at first, your current flow is not wide enough. Your thickened flow should also be wider and protrude a quarter from the tip of your wing (length of the wing + a quarter of the length of the wing) otherwise you will never see the wingtip vortexes.
- Be careful because your kite is very simplified so don't forget that drag is variable according to the speed and incidence of the wing (case at landing and takeoff).
- it seems to me that there is also a problem with the particles generated
