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Date: Fri, 04 May 2001 04:08:34 GMT
From: devil <>
Subject: Re: Water Injection

John Davies wrote: > > On Wed, 2 May 2001 23:14:54 -0400, "Jean Luc Monette" > <> wrote: > > >Hi all! > > > >Actually, water-methanol injection has been used on turbine aircraft engine > >for a very long time. What it does? > >lowers inner turbine temperature, increases air density since water is less > >compressible than air, thus permitting to produce more power at less > >temperature inside the engine. Mind you that this is done in a controlled > >fashion, as far as water in a puddle is concerned, I wouldn't want that to > >get in my saab's turbo!!! > > My thoughts on water injection: the performance increase is due to the > dramatic cooling of the incoming air by the rapid evaporation of the > water droplets. Not because water is "less compressible" than air. > There is no liquid water by the time the airflow has reached the > critical parts of the engine. Actually, it's because with the water in, the mass of the cycle fluid is increased.

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