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Date: Thu, 03 May 2001 07:44:38 -0700
From: John Davies <>
Subject: Re: Water Injection

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. This is why a mist is needed rather than a squirt. Liquid water will erode a hot compresser wheel. John Davies Monroe WA USA

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