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Free CAD Software
Jörg posted a topic in General ModelingHi together, The software CAESES is a CAD and optimization platform. For students and PhD students there are free non-commercial licenses available. In addition, there are low-price offers for start-ups and smaller companies. CAESES can be used for 2D and 3D parametric modeling, see this link for some information about its CAD capabilities. Here are some screenshots: Compared to traditional CAD systems, CAESES is a bit different. It comes with a strict object-oriented approach, i.e. the user sets up dependencies between objects and these dependencies are then kept. This makes it easy to automate the geometry generation process. Here are some features of CAESES: Full 2D and 3D modeling capabilities (NURBS-based)Roughly 20 curve types and 15 surface typesStandard transformations (translation, rotation, scaling)Writing of custom features and functionsBoolean operationsTrimmingFillets between surfacesMorphing functionality for deformation of existing geometrySurface tessellation control through e.g. trimesh objects to create and fine-tune custom STL dataCommon import and export formats e.g. IGES, STEP, PARASOLID, STLIndustry-specific modules for blade and ship designBatch mode for non-GUI (hidden) geometry generation in the background Cheers Joerg LAST UPDATE: NOV 2017
Free Propeller Design Software
Jörg posted a topic in General ModelingCAESES provides comprehensive functionality for propeller and fan designers so that it can be used as an expert blade design software. Basically, any kind of propeller blade (e.g. boat propeller, aircraft propeller, blowers, fans etc.) for any application can be created with it. CAESES focuses on the variable geometry of blades for design explorations and shape optimization (mostly, together with CFD). Here is a screenshot for an axial blade design, taken from one of the samples that are shipped with CAESES: For general information about modeling of propellers, see the MARINE SECTION. For other rotating machines, please see the TURBOMACHINERY SECTION. 2D PROFILES 2D profiles can be defined by the user. These can be either parametric (e.g. camber curve + thickness distribution) or based on profile data from an air foil data base. There are models available with special definitions such as Wageningen B-Series. NACA curves are also available in CAESES via the menu > curves > naca. When generating the 3D propeller surface, the profile parameters can be changed by means of radial functions for each 2D parameter (e.g. chord, camber, thickness). IMPORT AND EXPORT In order to import or export the blade in a proprietary format, feature definitions can be used which allows you cope with e.g. company-specific ASCII formats. The PFF (Propeller Free Format) is directly supported. EXTERNAL TOOL / CFD AUTOMATION Any preliminary design tool (XFOIL etc) or even CFD packages (in-house, open source, commercial) can be integrated so that a new design can be analyzed within CAESES. BLADE ANALYSIS There is a functionality that can analyze an imported blade surface (given as NURBS) to give you the chord, rake, skew, pitch, thickness and camber distributions. CUSTOMIZATION There is a lot of scripting possible in CAESES so that any specialized design process can be fully transferred into the platform. For instance, if you use Excel sheets for your profile definitions, you can access them through CAESES but also re-implement your methods using the feature definition programming editor. EXAMPLES Some propeller design case studies can be found in this section. If you are interested in drone design, then check out this post here. Here are some videos - the last one I put there only to give you an impression about how the geometry controls can be wrapped and accessed for applying changes, this can be done for all other types of blades as well. Wageningen Propeller ModelPropellerBlade Tip DesignGeometry Changes for an Axial Fan (and a Ship Hull) - Demo Video ONLINE TOOL Finally, check out the new online geometry creator for the Wageningen B-Series. Browser-based, intuitive web app.Allows you to generate typical B-Series propellers with just a few clicks.Requires very little propeller design expertise.The final geometry can be downloaded as STL or STEP file. LAST UPDATE JANUARY 2018 Note that there are 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.
Free Impeller and Pump Design Software
Jörg posted a topic in MiscellaneousHi together, There have been several questions about impeller and pump design with CAESES which is the reason for putting together the following brief summary: CAESES is used by several major pump makers (KSB, Ebara, Grundfos, DMW), mostly in the context of impeller and volute/casing optimization. In the context of turbocharger design, CAESES is used by e.g. MTU (large Diesel engines) for compressor and turbine optimization. There are free academic versions of the CAESES pro edition for students and PhD students as well as trial licenses, plus special editions for small companies, start-ups and freelancers. COMPARISON TO OTHER TOOLS Compared to other design tools on the market, CAESES focuses on automated design studies with your simulation tools. In most cases, there is already some sort of a baseline design that needs further optimization. Based on this design, a parametric CAESES model is created and automated. The possibilities for customization and shape fine-tuning are massive, so that specialized (company-specific) design processes can be completely defined in CAESES. No black box models etc. This is one important key issue, i.e., flexibility and full customization - besides the fact of having a 100% robust variable geometry for automated processes. IMPELLER BLADES There is functionality for creating parametric impeller blades (meridional contour definition, mapping from 2D onto 3D stream surfaces), which can also include analysis and optimization of the channel areas etc. See the turbomachinery section for more details. A water pump is described in this blog post. Any type of impeller can be parameterized, including complex shapes such as turbine scallops. VOLUTES Here is an overview with some animations. Basically, CAESES focuses on robust modeling of any volute type (in particular: turbochargers, pumps). Design constraints can also be built into the model, as well as typical controls (A/R distribution etc). The more complex your volute is, and the more problems you have to create new design candidates (automated), the more you should consider trying out CAESES. CFD AUTOMATION CAESES users also integrate their CFD and preliminary design tools. With this, a new design candidate can immediately be analyzed, directly within the CAESES GUI. Any open source, in-house or commercial tool can be coupled. You just need a batch mode for these tools. Excel sheets can also be accessed. For CFD analysis, the flow domain can be directly derived from the parametric impeller geometry. There is a CAESES ACT app available, to integrate CAESES into the ANSYS Workbench and to run optimizations with e.g. OptiSLang. MORE MATERIAL I recommend to browse through this page. Please find also attached a related presentation from the FRIENDSHIP SYSTEMS Users' Meeting 2013. I also added some related pics and animations. Unfortunately, it is not that easy to show more material since most data is confidential. Anyway, I hope this post helps a bit in terms of a quick overview. Cheers Joerg LAST UPDATE JULY 2019 UM2013-07-klemm-diffuser-design-for-multistage-pumps-with-FFW.pdf
Free Ship Hull Design Software
Jörg posted a topic in MiscellaneousHi together, Note that CAESES is a ship hull design software, in particular, in the context of hull form optimization with CFD (computational fluid dynamics). It mainly focuses on the underwater part. The software provides comprehensive CAD functionality for generating smooth and variable hull surfaces , a complete variant management, 2D section visualization, hydrostatic calculation, 2D drawing, Lackenby transformation, STL and CAD tools for creation of flow domains, plus integration mechanisms to plug-in simulation and other preliminary tools. Energy-saving devices and propellers can be modeled, too. Furthermore, sea-keeping tools (basically, any other external software) can also be added to the design process. Please find below more screenshots that are taken from CAESES. Cheers Joerg LAST UPDATE NOV 2018: Note that there are FREE pro editions for students and PhD students, plus special packages for start-ups, small companies and freelancers. nurbs_direct_modification.mp4
Free Turbomachinery Design Software
Jörg posted a topic in MiscellaneousHi together, CAESES can be used for designing a variety of turbomachinery and engine components (impellers, volutes, ducts, axial blades,...). I have attached some pictures and animations, just to give you an idea of the applications. There is also a page about the turbomachinery industry on the CAESES website. Check out the blog where turbomachinery design stories get posted on a regular basis (most of the attached pictures are taken from these blog posts). The focus of CAESES is: Fast and efficient design studies and CFD-driven shape optimization. The robust variation (manual/automated) of turbomachinery components is really the interesting part in CAESES. The geometry models are typically highly customized, i.e., company-specific know-how can be fully integrated. There is an internal scripting environment to define custom methods and processes. Complex parametric models can be wrapped into an easy-to-use interface (so that they can be readily used by non-experts of CAESES). Parametric support geometry such as segments for the flow and structural analysis can be part of the model, too. As a side note, you can optionally plug-in your CFD tool and run optimizations right away - from within the CAESES GUI. There are integrated optimization methods and some handy post-processing capabilities. Alternatively, you can use your own optimization tools and run CAESES in batch mode. There are free academic versions of the CAESES pro edition for students and PhD students, as well as trial licenses with flexible time frames. There are also special editions for small companies, start-ups and freelancers. Hope this helps, Joerg LAST UPDATE FEBRUARY 2018