Timeline for Why will the pressure distribution of a swept wing promote stall?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 10 at 3:37 | vote | accept | Wyatt | ||
| Jun 14 at 20:22 | comment | added | Rob McDonald | I just posted an edit and image that might help. | |
| Jun 14 at 20:21 | history | edited | Rob McDonald | CC BY-SA 4.0 |
added 989 characters in body
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| Jun 14 at 20:17 | comment | added | Wyatt | (I will admit I don't understand bound vortices / horseshoe vortex systems that well) | |
| Jun 14 at 20:08 | comment | added | Wyatt | I do recall that answer, but it said "When you apply these vortices to a swept wing, the inboard trailing vortices start first. They are in-line with the wingtips and have greater influence on the lift of the wing. The vortices that trail from the wing tips start later and do not have the same alignment with the center of the wing in order to have an effect." which I thought meant the inboard vortices have more of an effect than the outboard. I think there must be something I'm not understanding here. | |
| Jun 14 at 19:36 | comment | added | Rob McDonald | Don't you recall the other question where we talked about how the trailing vortices mostly have an effect perpendicular to them? Therefore, there are many such vortices affecting the outboard half of the wing, and fewer affecting the inboard half? | |
| Jun 14 at 19:14 | comment | added | Wyatt | I see. I'm assuming the reason for less effect near the centerline is due to the sweep reversing and changing the flow pattern? Sweep reversing meaning where the wing sweeps the other way at the centerline. | |
| Jun 14 at 19:02 | comment | added | Rob McDonald | it would seem that the trailing vortices are causing an upwash near +-2 that causes the local alpha to be higher and therefore higher local lift. These vortices have less effect near the center line. | |
| Jun 14 at 18:54 | comment | added | Wyatt | Right, but in the last graph, the horseshoe vortices seem to be affecting -2 / 2 most, not the center where the horseshoe vortices should have the most effect, correct? My theory is that this is due to spanwise flow. | |
| Jun 14 at 5:27 | comment | added | Rob McDonald | Recall your question that spawned this one. Sweeping the wing moves the horseshoe vortices aft and changes the lift distribution. The center of the wing is least affected by the trailing vortices. | |
| Jun 13 at 23:46 | comment | added | Wyatt | I see, thanks a lot for your detailed answer. So as for a swept constant-chord wing, why will the maximum lift be made not at the center of the wing, or at location -2 / 2 in the last graph? If the chord is constant, why is this the case? (Not considering spanwise flow, unless that is the reason) | |
| Jun 13 at 18:43 | history | answered | Rob McDonald | CC BY-SA 4.0 |