fluid in a spinning shaft

[gr888]

Hello all, just registered yesterday, looking for advice on a problem.
Im wondering if it is possible to use the centripetal force acting on a fluid inside a spinning shaft to vaporise the fluid.
Would it be possible, for instance, to add enough kinetic energy to a flow of fluid inside a shaft so that when it escapes through holes in the shaft and then through holes in a stationary collar a state change is induced?

I'm especially thinking at about diameters of about 10 to 20mm.

Can anyone suggest a way to analyse this problem mathematically, and the losses involved.

Many thanks,

 

[Latexman]

gr888,

Using this technique to vaporize a liquid? Is it possible? Yes. Is it practical? No. It would be very inefficient. Remember the mechanical to thermal energy conversion factor, 1 Btu = 778 ft-lb(f). You'd be counting on friction to heat the liquid to it's boiling point. Now if you heated the rotating shaft and, therefore, the liquid, that is getting more feasible.

Using this technique to atomize liquid? Yes. It's been done for years.


Good luck,
Latexman

 

[gr888]

Thanks for the response, that sounds like a really good starting point! What phrases and subjects should I be searching for on the net and in texts?

thanks once again,
Gerald.

 

[Latexman]

gr888,

No idea on the web/literature search. I think I'd start with custom heat transfer equipment fabricators. Closest thing I know of is a rotary drum dryer.

Good luck,
Latexman

 

[sailoday28]

Is it possible to grove or rifle in inside of the shaft?
Clearly work will be done on the fluid. By the First Law of Thermo, this work (for a closed system) will proportionatly increase the Energy content of the fluid. For an open system (flow in and or out)the temp and pressure will be directly affected.

 

[gr888]

That too sounds feasible sailoday28. Anyone know of any other similar mechanical scenarios?