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April 26, 2011, 03:13 |
Expander
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#1 |
New Member
Join Date: Apr 2011
Posts: 15
Rep Power: 14 |
Hello All,
I am fresher to CFD analysis and especially to CFX and need help understanding the basic process. I have gone through the tutorial but still need help with this specific case.So, your help would kick start my attempt. My problem consist of an inlet nozzle and expander(impeller). Question 1. 1. One Component Is it possible to vary the inlet flow direction if I am using only the impeller. Please see attached "One component". If possible please let me know in detail how. 2. Two Components I have modelled the nozzle and impeller in bladegen which generates a fluid zone before and after the bladed portion. I have brought in these two geometries as shown attached. I have offset the nozzle and impeller on purpose for your clear view. Is this correct approach? Should the fluid zones overlap as shown or they should not? Thank you, Karmavatar Last edited by karmavatar; April 26, 2011 at 03:14. Reason: Added sentence |
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April 26, 2011, 23:23 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143 |
You can specify inlet fluid velocity in the boundary condition tab.
Fluid volume domains should not overlap, but interfaces joining domains should overlap. I am not sure what you are askign here. |
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April 27, 2011, 00:59 |
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#3 |
New Member
Join Date: Apr 2011
Posts: 15
Rep Power: 14 |
Glenn,
Thank you for your response and answering my second question. For my first question, is it possible to have inlet flow direction say 20 degrees, 30 degrees other than "normal to boundary" ? Karmavatar |
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April 27, 2011, 01:07 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143 |
You can specify the inlet velocity as XYZ components in either cartesian or cylindrical coordinates. This should do what you want.
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April 29, 2011, 22:40 |
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#5 |
New Member
Join Date: Apr 2011
Posts: 15
Rep Power: 14 |
I chose cylindrical coordinates (a,r,t).
Intial setting was 1,0,0. I assumed that these go from 0 to 1, so I set 0.8, 0, 0 to get a different inlet angle. Is this how we set the angle? 'cause when I ran the solver it crashed. Thanks |
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May 17, 2016, 08:46 |
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#6 |
New Member
anonymous
Join Date: Jun 2014
Posts: 5
Rep Power: 11 |
Hi karmavatar, can you please tell me how to create nozzle in bladegen. I could not figure out anything in bladegen for nozzle.
Thank you in advance |
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