Propeller Tip (beginner)problems

[Mr. Jonas Holzbrecher 0]

Hello everybody,

 

I am beginner in designing propellers with CAESES and I need some assistance with the tip.

 

For a student project i work on a hydrokinetic axial turbine. For the basic design of the turbine (diameters, chord length, pitch) I use a self written EXCEL tool based on the theory of Betz and Schmitz. For the optimization of the design I use CAESES.

 

Now I have problems with the tip at the trailing edge. There is a gap and no even distribution of the tip. Please see the pictures. First I thought that this is a problem with the resolution in CAESES. But when I have a look in the CAD Model (NX) the problem is still there. When I generate a CFD Mesh in StarCCM+ the automatic surface repair of the mesher fixes this problem not completely.

 

I also have attached my CAESES File. Please can someone help me with this?

 

Thank you,

 

Jonas

3_Auslegung_0.24_m_t_optimiert.fdbc

[Mr. Carsten Fuetterer 9]

Hi Jonas,

 

you can simply reduce the tolerance of the blade Brep:

 

best regards

 

Carsten

[Mr. Jonas Holzbrecher 0]

Hello Carsten,

 

thank you for your reply. Now everything works fine.

 

 

Kind regards,

 

Jonas