At 05:33 AM 2/3/2003 +0000, Ian Woollard wrote:
Randall Clague wrote:If you do that you've used the latent heat of vapourisation in cooling the hot air near to the body, rather than in cooling the body; which I don't think is as good, since the cooled air may not be in contact with the vehicle, but I could certainly be wrong also.I could be wrong, but I think of it as a flash evaporator on nuclear steroids. Dump the water out the back. It will boil, and then disassociate, and then blow away, taking a bunch of heat with it.
Actually, it will cool the boundary layer. Since all of the heat transfer mechanisms that transfer heat to the body operate through the boundary layer, that is more or less equivalent to cooling the body.
-p
Mars or Bust!
www.marssociety.com
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