<VV> Re: compressing air
Thu, 12 Aug 2004 16:01:29 EDT
Which, of course, is an excellent case for a blow through with an
intercooler. Cool the air FIRST, and THEN vaporize the fuel! <G>
In a message dated 8/12/2004 12:22:11 PM Eastern Standard Time,
Quite true. This cooling from the evaporation of fuel depends, of
course, on the A/F ratio. For a 12 to 1 ratio (rich for high load) it's
deg. F cooling of the air/fuel stream.
In a message dated 7/29/04 4:47:38 PM Eastern Daylight Time,
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,
> I had less than 180 deg out of turbo before intercooler at 17 psi with a
TE60 on a nonvair motor.
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
temperature increase from 90 F.