humid is better in turbines

[Greg Hermann]

At 11:44 AM 8/23/01, rahmrh at cableone.net wrote:
>Only if you put lots of water into the compressor, at little
>bit is only just a bit corrosive (it is bad on the life of
>a  steam turbine to get too much liquid water droplets into
>the turbine).   I expect in a heavy rain quite a bit of water gets fairly
>far into the engine, probably even into
>the combustion chamber, even given the compression of
>turbine's I suspect that alot of the liquid may still
>be liquid even given the temp rise just from the increase
>in pressure keeping it liquid.   I also expect that the water injection in
>this sort of system would be high pressure straight into the combustion
>chamber bypassing the turbine compressor parts.
>
>			Roger
>
The pressure in the combustor section of a turbine is nowhere near high
enough to keep H2O from boiling at the temperatures involved.

The compressor is NOT a positive displacement device, so liquid lock is not
a matter of concern.

Blade erosion is not a particular concern in the compression sections,
either. The gas in the turbine sections is plenty hot enough that water
droplets are not a concern.

Basically--if you were to inject too much water, flame out would be the
first obvious problem.

In steam turbines blade erosion is a problem when liquid H2O is present,
but that's a whole different animal.

Greg


----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org