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-   -   Use of table of steam properties (http://www.cfd-online.com/Forums/cfx/23181-use-table-steam-properties.html)

Ermanno October 16, 2006 01:50

Use of table of steam properties
 
I carried out a simulation of one stage of HP steam turbine in CFX 10, using the table steam properties "SteamHP.rgp".I have the following problem:

If I use the heat transfer model "total energy" I find that the static pressure is higher than total pressure (b.c. inlet: Ptot,Ttot - b.c. outlet: mass flow rate. The values of these b.c. are the real design conditions and they are the only conditions I know).

If I use the heat transfer model "Thermal energy" the solver seems to work "correctly" and in CFX-post I find reasonable values. I can accept this transfer model for the present, because the Mach number in the throat area is 0.25 about, but does anyone know the reason of this behaviour?

Ermanno



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