Red Signature
by admin on Tuesday, December 21st, 2010 | Comments Off
Red Signature
is it possible to create a jet engine system with a cold exhaust or by-product....?
is it possible to have a military jet, witha cold exhaust.... like a cold after burner? can u produce a form of thrust large enough to propel an aircraft at super sonic speeds with a by-product being cold... i know the jet engine is just vapopr burning, thrust creating the flame but is there another form? can u create a military jet with a very low if not no infa-red signature? if a stealth aircraft were to be fired and the missile was a heat seeking one, there would be no hope for the missile.... and if it was radar guided, and the aircraft was stealthy and manueverable, it would greatly increase the pilots chance of survival... just an idea...
In order to propel itself, an airplane needs to expend energy. And no matter how carefully done, this incurs a raise in overall entropy. To get some air to move faster than the environment creates eddies on the boundary of the jet flow, and those eddies will dissipate by raising the temperature.
Every form of energy will eventually dissipate in heat.
So, the short answer to your question is: no, unfortunately.
The laws of physics do not allow for perfectly cold energy.
What you can do is dissipate the heat over a larger volume so that the exhaust plume is bigger but colder overall (but still contains the same amount of waste heat. Stealth aircraft use that technology to reduce their infra red signature (a bigger plume that is not as bright in infra red is more easily missed than a very bright tiny one -- one can easily spot a star in the night sky, but the same amount of light over a larger area is very hard to distinguish -- explaining why flares can be used to distract an incoming missile).
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