From: firstname.lastname@example.org () Organization: Netcom Date: 31 Oct 95 00:31:27 References: 1
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email@example.com (Gernot Auer (Prak 1 Gerhard)) wrote: >Is there anyone who can support clues how 'water injection' in any way could >effectively increase engine power? >We were discussing about how water as material itself could increase >the quantity of boost generated by the engines in first place, and thus >increasing the overall power. Any possibility this theory could make >it ? Gernot, Jet engines operate with much greater efficiency when they consume air that is cool and dence. That is to say that under these conditions, a larger quantity of air may be consumed at the same rpm. The conbustion process is more efficient with a higher air to fuel ratio for example, on a hot dry day jets generate less thrust than on a cold humid day. This phenomonon lead to the advent of water injection for use on some older jet engines. Forcing water into the inlet reprocuced the effect of a colder, more dence operating environment. Remember, also, that as the air passes through the compressor, it heats up due to friction. Depending on the engine, the air is usually at several hundred degrees F before it reaches the combustion chamber. Keeping this in mind, one is able to see that the water injected into the engine has become water vapor by the time it reaches the combustion chaimber. Hopefully I have helped you understand how and why water injection is used. If you have any further querries, you may e-mail me or post to the net any time. JCD USAF AVMAINT.