AutoGrid Mesh with Extremely Low Run-up

cbrian · March 3, 2015, 18:30

Hello,
I'm working on meshing a compressor blade with an extremely low run-up from the inlet to the LE (maybe space for 8 or 9 cells). This is causing some issues with the B2B grid, very poor orthogonality and aspect ratios, I think due to the O4H topology. Is there a good way to solve this issue without simply having a longer run-up?
Thanks.

Hamidzoka · March 6, 2015, 02:22

hi;
in your case default topology does not work.
you need to select a topology, among the available ones, in which inlet and O-grid block are merged together. it can be easily done in Autogrid5 through removing the check mark of inlet block in row mesh settings.
please let know if it helps.

regards

cbrian · March 6, 2015, 11:22

Quote:

Originally Posted by Hamidzoka

hi;
in your case default topology does not work.
you need to select a topology, among the available ones, in which inlet and O-grid block are merged together. it can be easily done in Autogrid5 through removing the check mark of inlet block in row mesh settings.
please let know if it helps.

regards

Thanks, I did not realize that was an option.

Pierre-Alain · March 7, 2015, 04:21

Good morning cbrian,

Applying the Row Wizard of AutoGrid5 may be worthwhile, if not already done yet, to get a first quality mesh on your configuration with the appropriate B2B topology and points distribution. You may want to check as well if a meridional control line is located between the inlet and the LE and control the streamwise number of points set here.

Best regards,

Pierre-Alain Hoffer
Product Manager for Turbomachinery Applications
NUMECA International

March 3, 2015, 18:30	AutoGrid Mesh with Extremely Low Run-up	#1
cbrian New Member Brian Join Date: Feb 2015 Posts: 15 Rep Power: 11	Hello, I'm working on meshing a compressor blade with an extremely low run-up from the inlet to the LE (maybe space for 8 or 9 cells). This is causing some issues with the B2B grid, very poor orthogonality and aspect ratios, I think due to the O4H topology. Is there a good way to solve this issue without simply having a longer run-up? Thanks.

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March 6, 2015, 02:22		#2
Hamidzoka Senior Member Hamid Zoka Join Date: Nov 2009 Posts: 282 Rep Power: 18	hi; in your case default topology does not work. you need to select a topology, among the available ones, in which inlet and O-grid block are merged together. it can be easily done in Autogrid5 through removing the check mark of inlet block in row mesh settings. please let know if it helps. regards

March 7, 2015, 04:21		#4
Pierre-Alain New Member Pierre-Alain Join Date: Aug 2014 Posts: 4 Rep Power: 11	Good morning cbrian, Applying the Row Wizard of AutoGrid5 may be worthwhile, if not already done yet, to get a first quality mesh on your configuration with the appropriate B2B topology and points distribution. You may want to check as well if a meridional control line is located between the inlet and the LE and control the streamwise number of points set here. Best regards, Pierre-Alain Hoffer Product Manager for Turbomachinery Applications NUMECA International