collapse

Author Topic: Prandtl–Glauert Singularities and Vapor Cones and Moisture Trails Oh My!  (Read 2026 times)

Offline burntheships

  • Administrator
  • Hero Member
  • *****
  • Posts: 2759
  • Gold 268


Weather conditions were just right the weekend of
October 9, 2011, creating the opportunity for some fantastic
photography during the Air Show of Fleet Week, held in San Francisco, CA.

I was hoping to get to see this phenomenom first hand,
as I attended the event for a few days. No such luck.
However I did get some great video footage which I will post
soon, and some decent photos.

Fortunately, there are some very skilled
photographers who did get these interesting moments captured!

Mix together some high humidity and fast aircraft and you
get a a few shock collars (sometimes known as Prandtl-Glauert
singularities, shock eggs or vapor cones).
http://en.wikipedia.org/wiki/Prandtl%e2%80%93Glauert_singularity

Photo Montage from Fleet Week, San Fransico, CA October 2011




These are pictures of planes traveling at transonic speed. Around the plane air is compressed into higher- and lower-pressure regions which cause instability in the flow. This builds up into a shockwave, and as the plane passes through it causes moisture to precipitate out of the air  - the shockwave of the plane creates high-pressure region in which moisture condenses producing the "shock collar". 



http://sfist.com/2011/10/10/photos_fleet_week_air_show_2011.php#photo-1



http://www.flickr.com/photos/agrinberg/6225347132/sizes/o/in/photostream/
« Last Edit: October 25, 2011, 11:36:02 PM by burntheships »
"This is the Documentary Channel"
- Zorgon

Offline burntheships

  • Administrator
  • Hero Member
  • *****
  • Posts: 2759
  • Gold 268
Caught on video, Amazing!

[youtube]dpo72HkrBkw[/youtube]

"This is the Documentary Channel"
- Zorgon

Offline Somamech

  • Order of the Mystic Star
  • Hero Member
  • *****
  • Posts: 3344
  • Gold 337
Thats pretty awesome BTS.  Looks like the jet is coming through a stargate :D

Offline burntheships

  • Administrator
  • Hero Member
  • *****
  • Posts: 2759
  • Gold 268
Thats a great word picture, a Stargate!
Yes, it looks likes its breaking in from another dimension!
"This is the Documentary Channel"
- Zorgon

 


Wal-Mart.com USA, LLC
affiliate_link
Free Click Tracking
Wal-Mart.com USA, LLC

* Recent Posts

Re: The American Left uncensored by No_Signal
[Today at 03:22:08 PM]


Re: The American Left uncensored by The Seeker
[Today at 03:14:07 PM]


Re: The American Left uncensored by No_Signal
[Today at 02:18:39 PM]


Re: Most Important/Definitive Documentation of Fukushima 'Lost' by AboveTopSecret by spacemaverick
[Today at 05:11:20 AM]


Re: Tom DeLonge Annoucement - New Tech by space otter
[February 24, 2018, 02:09:21 PM]


Re: Tom DeLonge Annoucement - New Tech by Pimander
[February 24, 2018, 01:14:31 PM]


Re: Tom DeLonge Annoucement - New Tech by space otter
[February 24, 2018, 09:47:37 AM]


Re: Tom DeLonge Annoucement - New Tech by A51Watcher
[February 23, 2018, 06:14:48 PM]


Re: Most Important/Definitive Documentation of Fukushima 'Lost' by AboveTopSecret by ArMaP
[February 23, 2018, 01:37:45 PM]


Re: Most Important/Definitive Documentation of Fukushima 'Lost' by AboveTopSecret by thorfourwinds
[February 22, 2018, 09:07:22 PM]


Re: The American Left uncensored by ArMaP
[February 22, 2018, 01:34:52 PM]


Re: The American Left uncensored by Littleenki
[February 22, 2018, 07:13:59 AM]


The American Left uncensored by petrus4
[February 22, 2018, 05:52:43 AM]


Re: The Question We Should Be Asking by petrus4
[February 22, 2018, 04:46:03 AM]


Re: The Question We Should Be Asking by Ellirium113
[February 21, 2018, 06:35:07 PM]


Re: The Question We Should Be Asking by Eighthman
[February 21, 2018, 06:23:13 PM]


Re: The Question We Should Be Asking by Eighthman
[February 21, 2018, 05:41:06 PM]


Re: The Question We Should Be Asking by zorgon
[February 21, 2018, 04:48:19 PM]


Re: The Question We Should Be Asking by Ellirium113
[February 21, 2018, 04:06:56 PM]


Re: The Question We Should Be Asking by Irene
[February 21, 2018, 09:45:51 AM]

affiliate_link