Surface exactly between two other surfaces

[HonzaS]

Hi,

I would need to create a new surface, which would be located exactly between two other surfaces. Concretely surface between two blades.

Illustrating images:
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http://files.engineering.com/getfil...-acef-4e3b-868a-a98d28605e98&file=zepredu.PNG

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http://files.engineering.com/getfile.aspx?folder=34447ef2-028e-45b5-ba1b-8a8f0338d695&file=b.png

I use NX 7.5 and I haven`t found a way how to do it yet. It could be done maybe with using Point Cloud..?
If it can`t be done in NX, could you recommend me another software?
Thank you very much for your advices.

 

[zilla74]

You can do the following in NX. What you will utlimately use is the Mid Surface Command (Insert > Surface > MidSurface > ...). I thought you might be able to use this function directly on the 2 faces, but it seems the function is looking for a solid to find the face pairs. So perform the following steps
1. Extract the to primary faces (Insert > Associative Copy > Extract Body - Type = Face, Face Option = Single Face, Select each face > OK
2. Create a Ruled Surface between the 2 faces (Insert > Mesh Surface > Ruled - Alignment = By Parameter, Settings Preserve Shape = Checked)
3. Sew all the faces into a Solid (Insert > Combine > Sew)
4. Now you can use the MidSurface Function (Insert > Surface > Mid Surface > Face Pairs - Select the Solid, Face Pairing = Select the Automatically Create Face Pairs Icon
Done

 

[HonzaS]

I have already made a solid from the space between two contiguous blades.
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http://files.engineering.com/getfile.aspx?folder=a068997b-e6a2-49e6-a437-2a93c98fe2aa&file=solid.PNG

One point of the required surface is in the following picture. It has to be in the middle of the arc between two points of blade faces.
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http://files.engineering.com/getfil...-b9ed-04b93b5cd5b3&file=point_contruction.png

I don`t understand the function Mid Surface. I have tried a various options, but it still does strange things, which I can`t influence.

Is there any other way, how to fix my problem?

 

[cowski]

What do you need the midsurface for? What is your end goal you are trying to achieve?

 

[HonzaS]

I have a stator blades model of a turbine and I need to create computational model of the part of air channel around one blade for Fluent.

Sample
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http://files.engineering.com/getfile.aspx?folder=5a1718a7-d0ec-4ed4-8854-671b2f920433&file=kanal.PNG

So I want to divide a space between blades, after that I move one part to the second side of the blade and then I will be able to continue modeling.

 

[HonzaS]

Is it possible to export XYZ (or cylindrical) coordinate data of two surfaces to some spreadsheet eg. Excel? How could I do it? I have found a thread about it, but I did not succeed... (

http://www.eng-tips.com/viewthread.cfm?qid=164205)

Then I could count a point cloud of the requested surface.

Thanks