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head of an axial turbine in two-phased analysis |
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#1 |
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amirbhr
Join Date: Jul 2019
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Hello all!
I am simulating an axial water turbine within an open channel. The simulation has been done using a free surface method for two phases water and air. In cfd-post, I have a problem with the efficiency computation while calculating the net hydraulic head. I cannot find any way to calculate the efficiency directly and I have to find the head to evaluate the efficiency. Would anyone help me in this regard? |
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#2 |
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amirbhr
Join Date: Jul 2019
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any help would be greatly appreciated
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#3 |
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Join Date: Jun 2009
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Are you using the existing macro in CFD-Post for efficiency? If yes, do those macros work for multiphase simulations?
What is the formula you expect should be used for those calculations? perhaps with such information, someone in the forum can help realize it via expressions.
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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#4 |
New Member
amirbhr
Join Date: Jul 2019
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Thanks, Opaque!
Yes, I used Macro icon, but I encountered the error "no total pressure in stn. frame". Besides, I tried to use the formula T(torque on shaft) * omega / (rho * g * Q(mass flow rate) * H (net head over the axial turbine) ). In this stage, the calculation of the hydraulic head (H) is my question. |
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Tags |
efficiency, free surface, hydraulic head, water turbine |
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