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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX July 2, 2018, 06:55

Replies: 30 Negative power and torque(Axial Turbine analysis) Views: 8,112 Posted By ghorrocks You have to be careful about your definition of... You have to be careful about your definition of positive and negative. But assuming your comment means that a compressor is producing a negative torque (ie a torque in the direction of rotation),...

Forum: CFX December 20, 2011, 16:08

Replies: 30 Negative power and torque(Axial Turbine analysis) Views: 8,112 Posted By ghorrocks Sounds extremely unlikely. What meshes did you... Sounds extremely unlikely. What meshes did you check? Then you need to go further downstream.

Forum: CFX December 20, 2011, 05:40

Replies: 30 Negative power and torque(Axial Turbine analysis) Views: 8,112 Posted By ghorrocks And please show some images of the flow field -... And please show some images of the flow field - steamlines would be nice.

Forum: CFX December 20, 2011, 05:36

Replies: 30 Negative power and torque(Axial Turbine analysis) Views: 8,112 Posted By ghorrocks Look a bit deeper. Graph the torque versus mesh... Look a bit deeper. Graph the torque versus mesh size. Is it trending in the right direction? Is it all over the place? This can tell you if you are close or not. You outlet is showing lots of back...

Forum: CFX December 19, 2011, 05:48

Replies: 30 Negative power and torque(Axial Turbine analysis) Views: 8,112 Posted By ghorrocks Your mesh looks very coarse. Have you read this... Your mesh looks very coarse. Have you read this FAQ: http://www.cfd-online.com/Wiki/Ansys_FAQ#Why_are_my_results_inaccurate.3F Especially the bit about mesh resolution?

Forum: CFX December 18, 2011, 16:43

Replies: 30 Negative power and torque(Axial Turbine analysis) Views: 8,112 Posted By ghorrocks It means you have not hit the steady state... It means you have not hit the steady state operating condition. For instance, if you run a turbine at too high a rotational velocity you will get negative net torque - this means the rotor is...

Showing results 1 to 6 of 6

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