Water Injection (Was: Re: Wide Ratio O2)

[Clive Apps Techno-Logicals 416 510 0020]

> 
> In a message dated 98-03-24 00:16:57 EST, you write:
> 
> << What causes the erosion?  Are the water droplets eroding the turbine 
>  blade just from their m >>
> 
> I'm not sure, but I think it's the mass of a water droplet hitting the blade
> at 100,000 rpm, which is probably like dropping a rock on your foot.


calculating for a 4" turbine spinning at 70,000 RPM
I get 1 water drop exerting approx 10ft lbs of force on impacting the outer
edge of the blade

this is assuming that 15 drops = 1 ml (1g) of water
the drops may only be 1/10th this size so 1ft lb each of torque


not a lot
but when you get 100s or 1000s of these all in a short time period that is 
going to add up

Clive