Rolf, Mark and All,

I have to correct my previous post. Mark was right. The total pressure
in the turbine is the sum of the static and dynamic pressure.

This is exactly what Bernoulli's Equation tells us:

Along a streamline: static pressure + dynamic pressure = total pressure

Expressed mathematically:

static pressure  + (density  * Velocity^2 / 2) = total pressure

In reference to that turbine chart, the pressure obviously shows the sum
of hte static and dynamic pressure.

The reason the flow does not back up is still explained by inertia, but
it is true that the total pressure equals the dyanmic and static
pressure, as Bernoulli tells us. No doubt about it.


Regards,

Gordon.

Gordon,

(I cut the bottom of message off as we all know it.)

Good that we have it correct now. At least I agree with it.

One point, would the 'dynamic' pressure not be the same as is described
by 'inertia" of the gas.
I think that is one and the same thing. How do you see it?
However, if so, the dynamic pressure would have a direction, it would be
a vector quantity.
The direction, of course, is toward the exhaust nozzle.
Any comments on that?

Regards

Rolf

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