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Rogers, Bob J. wrote:
If you add another turbo to capture the remaining exhaust gas, the
compressor portion will generate compressed air, which can be directed
to flow over an oil cooler or a radiator, but the air will be much
hotter than the outside air available for cooling. When the air is
compressed, it is heated by as much as 100 degrees. The temperature
rise is a function of the amount of compression. That is why you need
an intercooler before such air is routed to an engine intake for
combustion. I doubt that the air from a compressor stage of the turbo
would be cool enough to help reduce the water or oil temperature very
much (if at all) and the volume of air would not be significant compared
to the volume of air available in the free stream of outside air. Plus
you have the added weight of the turbo to deal with. In short, it would
not work.
That setup wouldn't. The compressor will also generate a vacuum, though. Put it behind the rad to increase the dP and
you allow for a thicker rad. You can then duct it so that you pull cooling air from a detrimental high pressure point
on the airframe...one of those points that slow the plane down. You'll definitely need a larger compressor, and you'll
have to watch for exhaust back pressure, so an OTS solution is probably out of the question, unless you can frankenstein
the front end from a large diesel onto a 13B sized backend.
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