angled wing profile

[psychonaut]

Hello, everyone! In the meantime, my name is luca, I've been writing for a while, but it seems to me that I've never sent a message to this forum. .
I had a doubt: I should make a wind turbine svergolata with different sections (profile naca23017); I had some problems, especially because a profile vertex creates cusp.. I would like to know if the optimal procedure for creating it is with solid multisection, or if there is perhaps a faster and more effective procedure.

thanks in advance! :

 

[ferrezio]

can be made both with solids and surfaces, and the suitable function is multisection in both cases (but a more complex modeling may be required).
I do not know the complexity of the wing profile, as I would make a structure as in figure,
I would tie the orientation of the profiles to a twisted surface and basic profiles that control the curvature of the wing.

Hi.

 

[Counterblow Hammer]

I don't know catia, but I want to give it to you to be able to shape the shovel quietly:
- trace the bell curve (both unique and lying on a single floor, and it originated from the combination of two other curves lying on normal planes between them);
- divide this curve into the points on which you will place the characteristic sections;
- on each point draws a normal plane to the bell curve: That plan will be your sketch plan. Remember to fix a congruent reference tern with the newly drawn plane so that you can correctly fix the twist angle of the characteristic section;
- made all sections at this point you should build two curves: one will join the ends of the alar profiles, the other the points obtained by intersecting the average lines of the individual profiles with the connection to the filling of the profile itself.

at this point the game is made: you have all the duly slipped profiles, you have the bell line and two congruent tracks with the profile you have to create. At that point you just have to build the shovel... :

Good job


p.s.: in theory on these blades, given the dimensions of the blade are > of the dimensions of the profiles, it is not necessary to project these on the surfaces that create the cylindrical sections; It still checks that I'm not wrong. . .

 

[psychonaut]

View attachment 33377can be made both with solids and surfaces, and the suitable function is multisection in both cases (but a more complex modeling may be required).
I do not know the complexity of the wing profile, as I would make a structure as in figure,
I would tie the orientation of the profiles to a twisted surface and basic profiles that control the curvature of the wing.

Hi.

thank you for the answer!
but so to avoid the cusp on the profile top, would it be enough to insert two guide curves that follow the shifting? Maybe you imported from excel with a macro? alternative to creating a twist surface

 

[psychonaut]

I don't know catia, but I want to give it to you to be able to shape the shovel quietly:
- trace the bell curve (both unique and lying on a single floor, and it originated from the combination of two other curves lying on normal planes between them);
- divide this curve into the points on which you will place the characteristic sections;
- on each point draws a normal plane to the bell curve: That plan will be your sketch plan. Remember to fix a congruent reference tern with the newly drawn plane so that you can correctly fix the twist angle of the characteristic section;
- made all sections at this point you should build two curves: one will join the ends of the alar profiles, the other the points obtained by intersecting the average lines of the individual profiles with the connection to the filling of the profile itself.

at this point the game is made: you have all the duly slipped profiles, you have the bell line and two congruent tracks with the profile you have to create. At that point you just have to build the shovel... :

Good job


p.s.: in theory on these blades, given the dimensions of the blade are > of the dimensions of the profiles, it is not necessary to project these on the surfaces that create the cylindrical sections; It still checks that I'm not wrong. . .

thank you very much for the details!if I can't do it with the other method, I will certainly try to follow your advice..the procedure is quite clear! :

 

[psychonaut]

I solved!
the problem of the wedges was due to the fact that I set a very low distance between the two sketches in which to put the sections of the profiles... therefore it is sufficient to operate only with solid multisection, properly rotating each profile without need of driving curves.. Thank you anyway! :