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Problem Definition :Cavitation in Francis Turbine

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Old   May 12, 2008, 03:46
Default Problem Definition :Cavitation in Francis Turbine
  #1
Amit Roghs
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I want to define cavitation in francis turbine. I am using the Rayleigh Plesset method, but am not aware of what value to feed for Saturation Pressure. I would like to know what CFX understands with Saturation Pressure & what should be its value.

Regards, Amit Roghs
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Old   May 13, 2008, 05:55
Default Re: Problem Definition :Cavitation in Francis Turb
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dia aisa
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hi please chich the tutorial in ANSYS - cfx to know how u can set your pressure,the tutorial in cfx help- tutorial
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Old   May 14, 2008, 02:43
Default Re: Problem Definition :Cavitation in Francis Turb
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Amit Roghs
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I have checked up but there is no information regarding mentioning saturation pressure.
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Old   May 14, 2008, 14:48
Default Re: Problem Definition :Cavitation in Francis Turb
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UnderwaterAlex
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Tutorial 19 - Cavitation around a hydrofoil: Under "Preparing a simulation with cavitation" - "Adding cavitation."

Saturation pressure for Water/Water Vapor @ 25 C = 3574 Pa

That's all the info I have.

Best of luck,

-Alex
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Old   May 26, 2008, 05:33
Default Re: Problem Definition :Cavitation in Francis Turb
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Amit Roghs
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Dear Alex, Thanks for the response, but how to reduce the value pressure at outlet, due to which cavitation incepts. I am still not understanding what saturation pressure means? Is it the pressure at which water vapour oozes out of water?

Regards, Amit
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