Timeline for Do turbofan engine cowlings dilate during spool-up?
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 14, 2020 at 18:38 | history | protected | user14897 | ||
| Jan 14, 2020 at 18:03 | answer | added | Gabriele Sartori | timeline score: 0 | |
| Jan 14, 2020 at 17:08 | comment | added | alephzero | The pressure difference across the engine cowling is negligible. The high pressures (and high temperatures) inside the engine are inside the strong inner case of the engine, not the sheet metal (or composite material) outer cowling. In any case, the purpose of the fan is not to create pressure difference but air flow velocity. The pressure rise from front to rear of the fan blades is only 1/10 of the pressure in your car tires, for example. | |
| Jan 14, 2020 at 10:17 | comment | added | chaos505 | looks like its a optical illusion, when the silver part of the cowling gets close to the window's rim it "dilates" on that corner. you can view similar effect with the base of a wine glass physicscentral.com/experiment/physicsathome/images/Lens.jpg | |
| Jan 14, 2020 at 5:45 | answer | added | user46146 | timeline score: 4 | |
| Jan 14, 2020 at 2:40 | answer | added | Anthony X | timeline score: 1 | |
| Jan 13, 2020 at 18:47 | answer | added | Soccerguy243 | timeline score: 2 | |
| Jan 13, 2020 at 17:25 | answer | added | alephzero | timeline score: 3 | |
| Jan 13, 2020 at 15:44 | history | became hot network question | |||
| Jan 13, 2020 at 15:15 | vote | accept | CommunityBot | moved from User.Id=12873 by developer User.Id=59471 | |
| Jan 13, 2020 at 9:00 | history | tweeted | twitter.com/StackAviation/status/1216646244371771392 | ||
| Jan 13, 2020 at 8:53 | answer | added | Jpe61 | timeline score: 44 | |
| Jan 13, 2020 at 8:21 | comment | added | user12873 | On the image, notice the end of the inlet on the bottom-left side (where the window frame visually meets the inlet). Far less of the white part of the cowling is visible on the right-hand image. Watching the relevant part on the video, you can actually see it dilating. | |
| Jan 13, 2020 at 8:07 | comment | added | Valay_17 | Can’t notice the difference, also it would be absolutely fine if it dilates although it won’t dilate too much, so much so that our eyes can notice the difference. The reason is not pressure difference but instead the fact that heating metal expands it(which again explains why it would not be easy to catch with our eyes). | |
| Jan 13, 2020 at 7:35 | history | asked | user12873 | CC BY-SA 4.0 |
