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Forum: Main CFD Forum

July 14, 2009, 20:02

Replies: 7

A pump paradox

Views: 3,373

Posted By bearcat

You're right. I have my rpm fixed at 100%. No...

You're right. I have my rpm fixed at 100%. No converging or diverging passage at outlet. When the mass flow rate is reduced to about 20% of the designed value, the downstream pressure became higher...

Forum: Main CFD Forum

July 13, 2009, 23:22

Replies: 7

A pump paradox

Views: 3,373

Posted By bearcat

Thank you for your suggestion. I also have...

Thank you for your suggestion. I also have similar idea. I tried to close the outlet as a dead-end wall, and the CFD solver diverged very fast. I read some inducer CFD papers (such as...

Forum: Main CFD Forum

July 13, 2009, 19:52

Replies: 7

A pump paradox

Views: 3,373

Posted By bearcat

That's true. It's a rotating Archimedes screw in...

That's true. It's a rotating Archimedes screw in a cylindrical domain. The question is: Why it can generate a pressure rise? I don't expect any downstream converging or diverging passage.

A...

Forum: Main CFD Forum

July 13, 2009, 18:26

Replies: 7

A pump paradox

Views: 3,373

Posted By bearcat

A pump paradox

I'm not a pump professional. But recently I am working on an axial pump inducer simulation. I encountered a paradox on the pump theory I could not explain and don't know if anyone here can help.
...

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