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March 22, 2013, 14:45 |
Importing Points for Airfoils
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#1 |
Member
Join Date: Apr 2012
Posts: 71
Rep Power: 13 |
Good Afternoon
I'm Trying to import the selig 1223 coodenates on ICEM like one tutorial I found on youtube but I'm having problems with it. http://www.youtube.com/watch?v=tYrbScUH9RE I counted the lines (with xcel ofcourse) and wrote this number and the number of curves like the tutorial said but.... When I select the file and press apply anything happens. I'm uploading the image of the two selig files, one is the original and the other is the one I modified following the tutorial instructions. What's the correct layout of text to import points on icem CFD ? Is (*).dat a good format ? thanks |
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March 25, 2013, 08:29 |
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#2 |
Senior Member
Javi
Join Date: Jan 2013
Posts: 276
Rep Power: 16 |
If you followed the video tutorial is easy to do:
1) Number of points per curve 2) How many curves are 3) Points of curves. Starting with the leading edge. If you are using a. txt to import the points, here I give you a file that you serve as an example. |
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March 25, 2013, 09:08 |
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#3 |
Member
Join Date: Apr 2012
Posts: 71
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Thank you !!
It worked !!! |
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March 29, 2013, 12:46 |
Leading edge radius?
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#4 | |
Member
Sheng
Join Date: Jun 2011
Posts: 62
Rep Power: 14 |
Quote:
Using your coordinate, I've got a sharp leading edge which is not smoothed--see the attachment. Any ideas? Will you suggest more dense data points? Sheng |
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April 9, 2013, 04:06 |
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#5 |
Senior Member
Javi
Join Date: Jan 2013
Posts: 276
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Hi,
sorry for answering so late. I have always used this method and it works. Maybe it's because you do not have much points in that area (leading edge) or a graphic resolution problem.Try it with other profil with more points. |
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April 9, 2013, 05:21 |
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#6 | |
Member
Sheng
Join Date: Jun 2011
Posts: 62
Rep Power: 14 |
Quote:
Regards, Sheng |
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April 10, 2013, 04:43 |
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#7 |
Senior Member
Javi
Join Date: Jan 2013
Posts: 276
Rep Power: 16 |
take a look on Simonīs video:
http://www.youtube.com/watch?v=tYrbScUH9RE Just only 35 seconds, from 0:15 to 0:50. I always put the pressure area (in this case curve) and suction area, hence, 2 curves. About tangent point, always begin the curves from 0,0,0 and end them at 1,0,0 (x,y,z). |
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April 10, 2013, 06:56 |
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#8 | |
Member
Sheng
Join Date: Jun 2011
Posts: 62
Rep Power: 14 |
Quote:
Thanks for your reply. I've gone through the video again. I tends to think more points near the leading edge will be better. So I grab a coordinate file of a Clark Y aerofoil and import it into ICEM. Please see the attached picture. The leading edge is of good quality as no non-tangent places can be observed. So the key point is to keep sufficient coordinate points near the leading edge. Regards, Sheng |
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April 10, 2013, 07:23 |
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#9 |
Senior Member
Javi
Join Date: Jan 2013
Posts: 276
Rep Power: 16 |
Good one. As I said you, in this area must be some points more than you put in the first image attached. There were only 3 points exactly near to the leading edge.
I'm glad it's been resolved! |
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April 23, 2013, 19:02 |
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#11 | |
Member
Sheng
Join Date: Jun 2011
Posts: 62
Rep Power: 14 |
Quote:
In the four segments you mentioned, how large or how long should the leading edge be? I guess short? If using the "leading edge" zone, I am worried because the post processing may be more complicated. When not using the "leading edge" zone, after solution, it is convenient to plot pressure coefficients or skin friction on aerofoil surface because I can simply select the "upper" and "lower" surface as the wall zone. If a "leading edge" zone is in presence, I probably have to export data on all wall zones with coordinate X Y, and then plot in other programs, because it is not necessary to say which part on the plot is on the leading edge in the legend (the upper and lower division is already sufficient). Sheng |
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June 15, 2017, 08:44 |
RAE2822 coordinates on ICEM 15.0
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#12 |
New Member
Prasetyo Edi
Join Date: Jun 2017
Posts: 5
Rep Power: 8 |
Hay all,
I'm Trying to import the RAE2822 coordinates on ICEM 15.0 like one tutorial I found on youtube but I'm having problems with it. Anyone, please help many thanks : P Edi Last edited by pedi_cfdonline; June 15, 2017 at 10:31. |
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June 15, 2017, 11:03 |
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#13 |
Senior Member
Javi
Join Date: Jan 2013
Posts: 276
Rep Power: 16 |
Hi Prasetyo,
What sort of problem do you have? I have realized you specified your curves have 70 points but actually have 65. At the same time, I got this airfoil shape... |
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June 15, 2017, 11:59 |
RAE2822 coordinates on ICEM 15.0
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#14 |
New Member
Prasetyo Edi
Join Date: Jun 2017
Posts: 5
Rep Power: 8 |
ya you right, thanks
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