|
[Sponsors] |
May 22, 2012, 11:07 |
negative efficiency
|
#1 |
New Member
sajad
Join Date: Aug 2010
Posts: 17
Rep Power: 16 |
hello everyone
I am reading "Fine turbo tutorial guide" I've done the example for Hydraulic turbine-Francis , every thing is ok but the result for efficiency is negative value I set the rotation speed= -500.0 as said in the tutorial these are the results in the ".mf" file under "global performance" part : Static_pressure_rise -56981. Absolute_total_pressure_rise -55488. Static_Head -5.8027 [m] Absolute_total_Head -5.6506 [m] Static_temperature_rise 0.53888E-02 Absolute_total_temperature_rise 0.57514E-02 Efficiency -0.86326 (based on total pressure rise and power) Axial_thrust -11945. [N] Torque -329.92 [N m] Power 17275. [w] I think the problem is in the definition that it uses for computing efficiency , but i don't know how to correct it could anyone help me? thanks |
|
Tags |
efficiency, fine turbo, francis turbine |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[Other] mesh airfoil NACA0012 | anand_30 | OpenFOAM Meshing & Mesh Conversion | 13 | March 7, 2022 18:22 |
[blockMesh] error message with modeling a cube with a hold at the center | hsingtzu | OpenFOAM Meshing & Mesh Conversion | 2 | March 14, 2012 10:56 |
channelFoam for a 3D pipe | AlmostSurelyRob | OpenFOAM | 3 | June 24, 2011 14:06 |
[blockMesh] BlockMesh FOAM warning | gaottino | OpenFOAM Meshing & Mesh Conversion | 7 | July 19, 2010 15:11 |
[blockMesh] Axisymmetrical mesh | Rasmus Gjesing (Gjesing) | OpenFOAM Meshing & Mesh Conversion | 10 | April 2, 2007 15:00 |