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October 6, 2017, 16:00 |
Diffuser analysis - Compressible flow
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#1 |
New Member
Dameon Derk
Join Date: Oct 2017
Posts: 2
Rep Power: 0 |
My diffuser is something like as shown in this image. http://turbomachinery.asmedigitalcol...11007_f002.png
I have the impeller exit velocity components and total temperature at diffuserr inlet , but I seer compressible flows, I cannot apply velocity inlet condition. How should I go about with the boundary conditions of this problem? I also don't have the diffuser exit conditions and I cannot apply outflow boundary as it is not compatible with compressible flows. Any help will be appreciated. Thankks a lot |
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October 10, 2017, 18:48 |
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#2 |
New Member
Dameon Derk
Join Date: Oct 2017
Posts: 2
Rep Power: 0 |
I am still looking for solutions..
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October 24, 2018, 10:08 |
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#3 |
Member
MWRS
Join Date: Apr 2018
Location: Islamabad
Posts: 99
Rep Power: 8 |
Me too. :/
Do you have total pressure and Mach at inlet? If so, I think applying Pressure inlet and mass fow rate outlet is a good choice. It wont have any compatibility issues. |
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October 26, 2018, 10:34 |
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#4 |
Senior Member
Lee Strobel
Join Date: Jun 2016
Posts: 133
Rep Power: 10 |
Hi, I think you need to clarify more about what you are trying to do:
1) What are your inputs? 2) What are you trying to calculate? 3) What software are you using? |
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October 26, 2018, 11:14 |
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#5 |
Member
MWRS
Join Date: Apr 2018
Location: Islamabad
Posts: 99
Rep Power: 8 |
Hello Time4Tea. I am using Ansys Fluent 18. I'm provided for a duct the total pressure, static pressure, and inlet mach.
The Mach is subsonic and compressible, above 0.3 Mach hence density is set to ideal gas. The domain is a diffuser with inlet, outlet and wall. I want to calculate outlet total pressure or pressure recovery. Please tell me what boundary conditions should I use for inlet and outlet? How do I specify the above mentioned known values in these boundaries? Last edited by waseeqsiddiqui; November 21, 2018 at 03:13. Reason: adding software name too |
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January 9, 2019, 10:55 |
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#6 |
Member
MWRS
Join Date: Apr 2018
Location: Islamabad
Posts: 99
Rep Power: 8 |
pls help.....
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Tags |
centrifugal compressor, compressible flows, diffuser, fluent |
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