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- Q15240741 subject Q8739737.
- Q15240741 abstract "A vapor cone, also known as shock collar or shock egg, is a visible cloud of condensed water which can sometimes form around an object moving at high speed through moist air, for example an aircraft flying at transonic speeds. When the localized air pressure around the object drops, so does the air temperature. If the temperature drops below the dew point a cloud forms.In the case of aircraft, the cloud is caused by supersonic expansion fans decreasing the air pressure, density and temperature below the dew point. Then pressure, density and temperature suddenly increase across the stern shock wave associated with a return to subsonic flow behind the aircraft. Since the local Mach number is not uniform over the aircraft, parts of the aircraft may be supersonic while others remain subsonic — a flight regime called transonic flight.Condensation cones appear in what was described as a Prandtl-Glauert singularity. In addition to making the shock waves themselves visible, water condensation can also occur in the trough between two crests of the shock waves produced by the passing of the object. However, this effect does not necessarily coincide with the acceleration of an aircraft through the speed of sound or Mach 1.".
- Q15240741 thumbnail FA-18_going_transonic.JPG?width=300.
- Q15240741 wikiPageWikiLink Q1424492.
- Q15240741 wikiPageWikiLink Q152225.
- Q15240741 wikiPageWikiLink Q1579556.
- Q15240741 wikiPageWikiLink Q160669.
- Q15240741 wikiPageWikiLink Q166583.
- Q15240741 wikiPageWikiLink Q178828.
- Q15240741 wikiPageWikiLink Q190688.
- Q15240741 wikiPageWikiLink Q210112.
- Q15240741 wikiPageWikiLink Q214634.
- Q15240741 wikiPageWikiLink Q223318.
- Q15240741 wikiPageWikiLink Q333268.
- Q15240741 wikiPageWikiLink Q43653.
- Q15240741 wikiPageWikiLink Q4456943.
- Q15240741 wikiPageWikiLink Q46397.
- Q15240741 wikiPageWikiLink Q48806.
- Q15240741 wikiPageWikiLink Q5159177.
- Q15240741 wikiPageWikiLink Q54363.
- Q15240741 wikiPageWikiLink Q569545.
- Q15240741 wikiPageWikiLink Q643043.
- Q15240741 wikiPageWikiLink Q8739737.
- Q15240741 comment "A vapor cone, also known as shock collar or shock egg, is a visible cloud of condensed water which can sometimes form around an object moving at high speed through moist air, for example an aircraft flying at transonic speeds. When the localized air pressure around the object drops, so does the air temperature.".
- Q15240741 label "Vapor cone".
- Q15240741 depiction FA-18_going_transonic.JPG.