Not rotating hub at inlet and outlet

mortezaastro · January 31, 2012, 08:17

Hello
I am trying to simulate the rotor of the radial inflow turbine. I create the geometry of rotor with Bladegen and create the mesh with Turbogrid. When I create the rotor geometry, two extended zones are created at inlet and outlet of rotor. The hub of this zones, shouldn't rotate. I know that I must set these portions of hub as counter rotating wall but I don't know how separate these portions from the hub in CFX or Turbogrid.
Please help me.
Thanks so much

Far · February 4, 2012, 05:31

This is not possible in Turbogrid and CFX.

The possible solutions are:

1. mesh the portion of hub, corresponding shroud and blade in turbogrid and non rotating inlet and outer portion in other meshing softwares (ICEM, Gridgen, Gambit, Ansys meshing) and the read all three meshes in CFX and create frozen rotor interface. You can also merge three meshes in ICEM as well.

2. you can separate the hub and shroud in Fluent in three parts and then you can import this mesh (single file) into CFX.

January 31, 2012, 08:17	Not rotating hub at inlet and outlet	#1
mortezaastro New Member Morteza Hamzehzadeh Join Date: Oct 2011 Posts: 1 Rep Power: 0	Hello I am trying to simulate the rotor of the radial inflow turbine. I create the geometry of rotor with Bladegen and create the mesh with Turbogrid. When I create the rotor geometry, two extended zones are created at inlet and outlet of rotor. The hub of this zones, shouldn't rotate. I know that I must set these portions of hub as counter rotating wall but I don't know how separate these portions from the hub in CFX or Turbogrid. Please help me. Thanks so much

February 4, 2012, 05:31		#2
Far Senior Member Far (turboenginner@gmail.com) Join Date: Mar 2009 Location: Islamabad Pakistan Posts: 1,179 Blog Entries: 1 Rep Power: 14	This is not possible in Turbogrid and CFX. The possible solutions are: 1. mesh the portion of hub, corresponding shroud and blade in turbogrid and non rotating inlet and outer portion in other meshing softwares (ICEM, Gridgen, Gambit, Ansys meshing) and the read all three meshes in CFX and create frozen rotor interface. You can also merge three meshes in ICEM as well. 2. you can separate the hub and shroud in Fluent in three parts and then you can import this mesh (single file) into CFX. __________________ Best Regards Far

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