![]() Usually, we give specialized blade and impeller training on these kinds of geometries. There might be still some issues with the fillets for certain parameter combinations, but with the upcoming version 4.0.4 this model is stable. Please find attached an updated model which should give you the basics, for generating your custom design. The main reason for this is that we completely replaced our old geometry kernel some time ago, and we couldn't maintain the full backward compatibility. Yes, the model from above is a rather old one, and it doesn't work with the newer versions of CAESES. There are also special editions for small companies, start-ups and freelancers. Note that there are now FULL FREE ACADEMIC versions of the pro edition CAESES for students and PhD students as well as trial licenses with variable time frames. I removed the old project file and added an updated CAESES model to this post. The project files in the attachment do not work correctly for CAESES 4.x versions, we now have much easier ways to design and control hub fillets. There are new samples directly included in CAESES that you can use for impeller modeling. Let me know what you think about the model (of course, I hope you'll like it.). You can also switch off the cake part since it is only there for visualization purposes and CFD pre-processing. This allows interactive changes to the model with a very short response time. If you want to change the beta distributions, only visualize the sections that are given in 00_sections. For instance, if you want to change the hub and shroud contour, then set the scopes 02_main, 03_splitter and 04_cake invisible. When working with the model, switch off all scopes that are "downstream" of where you currently manipulate things. There is also a feature definition included which generates the camber line with the leading edge as starting point. The camber lines of the blades are generated from the trailing edge which makes it easier to vary the beta distributions (e.g. These are automatically adjusted to the blade shapes. In addition, the model comes with some support geometries for meshing/CFD ("periodic boundaries"). The splitter blade is completely decoupled from the main blade in terms of the beta-distribution (so this gives more freedom) - but can be linked to the main blade, too. Fillet shape at the hub region by using a constant factor (BTW: this can also be varied with a function along the blade).Profile shape by means of user-defined thickness distributions and beta-angle distributions.Note that pretty much everything can be customized in this model and used for manual or automated blade design, such as: The project file will probably also be included in version 3.0.11. Please find attached a parametric model of a centrifugal impeller which was built in CAESES. ![]()
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