I really need your help!!
 

Hello everyone! I try to do a research of conjugate heat transfer, and I use MARKⅡturbine blade for that. Now I have the coordinates of blade and blade's holes(like picture 1 and picture 2), but when I put into ICEM, It is like picture3,how can I do that they can like picture 4? How should I do to transform for that? I really need your help! Thanks in adcance!:D:D

Hi,

I can help you with that.

Utkan

Thank you for your reply! Can you tell me how to do that? How to get the hole's coordinate in the same axis? I'm carzy now!:eek::confused:

can you tell me how to do that?:confused::confused::confused:

Can you try this link:

https://www.cfd-online.com/Forums/an...-blocking.html

thank you for you reply! but this is not the answer I want, I just wonder how to change the holes coordinates that the model like picture4.:confused:

If you know the angle between picture 3 and picture 4, you can do a rotation on all of the data points for the geometry to manually rotate it BEFORE importing into ICEM. That to me is the quickest way and can be done easily in excel, MATLAB, python, etc.

Hi
Thank you for your reply! I have tried to do a ratation on holes coordinates in Excel before I ask for help, but I failed, the following is what I have done. Just like picture 1, I know the setting angle is 63deg41min31sec, so I use the following formula to convert：
x=(x1-x0)cosa-(y1-y0)sina+x0
y=(x1-x0)sina+(y1-y0)cosa+y0
where (x1,y1) is holes coordinates, (x,y) is holes coordinates after rotation, (x0,y0) I am not sure how to choose, I use the point (3.434, 6.909) in picture1.
It is wrong with my formula?
Point datas are from this article 《analytical and experimental evaluation of the heat transfer distribution over the surfaces of turbine vanes》page 11-16. Can you help me for that? I'm quite new.....

Use the following equation for rotating about the origin, where x and y are the current points and x' and y' are the rotated point:

https://www.cfd-online.com/Forums/da...AAAElFTkSuQmCChttp://i.imgur.com/tLiKn1U.png

I think in your equation, (x0,y0) is the point of rotation (if it's not the origin).

sources:
https://www.siggraph.org/education/m...ran/2drota.htm
https://en.wikipedia.org/wiki/Rotation_(mathematics)