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Old   February 9, 2011, 02:02
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sudhir
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hi ,
i am doing analysis for steam turbine...so my inputs are
inlet pressure-125ata(12258310 pascals)
inlet temp -783K
inlet flow is 140 tonn/hr

now can any one tell me tht which type of boundary condition i have to choose...
coz i have pressure,temp and flow rate....so if i choose mass_inlet as my boundary type then where i have to give the inlet pressure...shall i give my inlet pressure in operating conditions...can any one suggest me reg this....
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Old   February 10, 2011, 03:06
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sudhir
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hi,
can anyone take some effort to reply my query....thanks in advance....
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Old   February 10, 2011, 08:30
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Hi Sudhir,
your problem is closed in incompressible region but in steam turbines compressibility effect is considerable! So you need to know the pressure where outflow exposed to.
e.g. consider a converge-diverge nozzle where mass flow rate and inlet pressure are known, by changing outlet pressure you will get different flow fields. therefore I think in compressible region your problem is not closed.
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Old   February 13, 2011, 12:35
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Thanks amir...will try and let u know the result..
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