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Hi all, for viscous flow computations it is necessary to have a watertight geometry. For this reason I created two features which closes the blade tip of the blades which were created with our blade engine. 1. Feature: I created a fillet curve above the blade gap with the fillet curve I created a lofted surface which closes the gap 2. Feature: I created a nurbs curve which depends on the fillet curve from the 1. Feature the two inner points of the nurbs curve are located on the fillet curveyou can change both the position of the points onto the fillet curve and the weights of the points with the nurbs curve I created a lofted surface which closes the gap so you have more control over the surface shape but also you do not have a tangential transition between the blade surface and the tip surfaceIf you are interested in viscous flow computations with our blade/propeller definition please give feedback to these features if it work good or not. I think I will improve the method within the next days (or weeks). Cheers Matthias closedBladeTip.fdf closedBladeTipNurbs.fdf

Hi together, Please find attached a parametric model of a centrifugal impeller which was built in CAESES. The project file will probably also be included in version 3.0.11. Note that pretty much everything can be customized in this model and used for manual or automated blade design, such as: Merdional contour (i.e. hub and shroud contour)Profile shape by means of user-defined thickness distributions and beta-angle distributionsFillet shape at the hub region by using a constant factor (BTW: this can also be varied with a function along the blade)Ellipse factor of leading edgeSize of tip gapRotational directionNumber of bladesThickness of casing 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. In addition, the model comes with some support geometries for meshing/CFD ("periodic boundaries"). These are automatically adjusted to the blade shapes. The camber lines of the blades are generated from the trailing edge which makes it easier to vary the beta distributions (e.g. fix the TE ends of the blades). There is also a feature definition included which generates the camber line with the leading edge as starting point. When working with the model, switch off all scopes that are "downstream" of where you currently manipulate things. For instance, if you want to change the hub and shroud contour, then set the scopes 02_main, 03_splitter and 04_cake invisible. If you want to change the beta distributions, only visualize the sections that are given in 00_sections. This allows interactive changes to the model with a very short response time. You can also switch off the cake part since it is only there for visualization purposes and CFD pre-processing. Let me know what you think about the model (of course, I hope you'll like it....). Cheers Joerg UPDATE AUGUST 2015: There are new samples directly included in CAESES that you can use for impeller modeling. See my more recent post below. 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. UPDATE FEBRUARY 2016: I removed the old project file and added an updated CAESES model to this post. Should work with versions >= 4.0.3. UPDATE FEBRUARY 2017: 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. There are also special editions for small companies, start-ups and freelancers. FS_CENTRIFUGAL_IMPELLER.pdf turbocharger_easyuse.fdb

Hi together, With CAESES, we also focus on the design and optimization of volute geometries. There is a volute section on the CAESES website. Students and PhD students can get a free academic edition of the pro version - the product page gives more information about this. Basically, the software allows you to create robust parametric volute designs for manual/automated design explorations and shape optimization with CFD. In most cases, the volutes in CAESES are tailor-made models, i.e. you can fully customize the geometry design: Arbitrary parametric cross-section definitions, e.g. based on your area (A) and center of area (=>R) specificationsUse of point data for creating a volute surfaceUser-defined A/R functions (bsplines, mathematical functions)Individual tongue modeling with additional parameters for more detailed design studies and fine-tuningAnalysis and control of inlet/outlet area distributions. Usually, our CAESES support team helps you in setting up customized models, either through the helpdesk or, for more complex models and a quick solution, by means of a customer project. See the attachments for some pictures and animations (e.g. the A/R function gets varied as well as the tongue shape). Cheers Joerg LAST UPDATE: FEBRUARY 2017