<VV> Re: compressing air
JVHRoberts@aol.com
JVHRoberts@aol.com
Thu, 29 Jul 2004 16:43:45 EDT
You forgot to take into account the cooling effect from the vaporizing fuel.
In a message dated 7/29/2004 4:29:50 PM Eastern Standard Time,
djtcz@comcast.net writes:
> I had less than 180 deg out of turbo before intercooler at 17 psi with a
TE60 on a nonvair motor.
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Was the 180 degree temp F of C? Was it temperature rise (natural with
compression) or the actual discharge temp?
There is a chart in Hugh MacInnes "Turbochargers" book that plots compressor
discharge temperature VS pressure ratio for compressor efficiencies from 56%
to 80% when starting with 90 degree F air.
I'd say 17 psi boost is a pressure ratio of 2.15. With a very efficient
well matched 80% efficient compressor it shows almost 260 F, which is a 170 F
temperature increase from 90 F.