Search the Community
Showing results for tags 'design'.
Found 12 results
Axial Fan Software
Jörg posted a topic in General ModelingCAESES is used for the parametric design of axial fans and similar turbomachinery products, mostly in the context of simulation-driven shape optimization. In particular, CAESES is used if you need robust variable geometry models for automated studies. The comprehensive CAD modeling capabilities are geared towards simulation and give fan designers full flexibility (no black box, customization possibilities). More information about turbomachinery design software can be found here. I have also attached a few animations that were generated in CAESES. The design variables of the axial fan model were varied automatically using the integrated variation methods. Note that this is a rather simple model which is also shipped with the software. It can be used as a reference design to set up custom models. The hub and shroud modeling is demonstrated, as well as the 2D-3D mapping of the cylindrical sections and some Boolean Operations to cut the blade at the tip and merge it with the hub. The fillet size can also be controlled by a parameter. If needed, you could also automatically derive the periodic flow domain for automated meshing with grid generation tools or CFD packages.
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 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
Manipulate Paths of Input Files
Jörg posted a topic in Software ConnectionsHi together, Here is a brief description if you would like to remove absolute paths from input files, e.g. because the path should change depending on the current design directory. Please have a look at the attached screenshots. Consider a simple input file which contains a path to another file, and I want this path to be the current design directory during an optimization. Add this file as input file at the software connector and make a double-click on it in order to edit it. Add a new entry for the absolute path. Change the entry type to FString . Use the command getDesignDir() in combination with your file name. Show a quick preview of your new entry. Here is the preview: That's it. Cheers Joerg
Centrifugal Impeller Blade Design
Jörg posted a topic in General ModelingHi 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
Stefan Harries posted a topic in General ModelingHi, One of the famous hull forms found in literature is the so-called Wigley hull. It is mathematically defined, see attached formula, and used regularly for tests and validation work. By definition the Wigley hull is a (simple) fully parametric model with beam, draft and height as parameters to control the shape (often normalized by length). A realization of the Wigley hull via a MetaSurface that captures the mathematical formula is given in the attached CAESES project. In addition, some partially parametric modifications are shown, namely, Lackenby type swinging of sections that is realized via a DeltaShift. (Please note that a Generalized Lackenby variation would also be available but was not used here in order to keep the project light.) If you need the hull for your CFD validation work you can use the various exports for panels, offsets, STL, iges etc. More information about ship hull design can be found in the marine section of the CAESES website. Kind regards, Stefan standardWigley.fdb
Diesel Piston Bowl Shape Design
Mr. Eren Uslu posted a topic in General ModelingHello everyone; I am working with one cyclinder, water cooler, natural aspirated, made in Turkey SuperStar Diesel Engine. I want to model of precious model of piston shape. Can you help for this mention? For example, I want to model piston shape in Caeses CFD and use in AVL Fire Ese Diesel or Ansys Forte.
Multi Segmented Smooth Curve
Mr. Ashesh Pradhan posted a topic in General ModelingWe can make a multi-segmented smooth curve from Feature Definitions -> Hull Design -> Multi Segmented Smooth Curve. The issue is I can only define '2' intermediate points in a curve. I want to join many multi-segmented curves to create a single curve. How do I do it ? I am a beginner in CAESES. I could not find it in documentation. Please help.
Mr. Abu Salih posted a topic in General ModelingHow to determine a spiral volute casing (turbocharger, pump) cross sectional decrease in value? I am trying to design a volute casing. Problem is, I don't know how much its cross sectional area decreases over time. For instance starting cross sectional area (0 degrees) is 100 cm^2, what will it be when it reaches 45, 90 degrees and so on? Is there any way to calculate it? I am sure that knowing starting and finishing cross sectional areas size (btw I know them) and just connecting them isn't a correct way.
Opening a project is very slow
Jörg posted a topic in MiscellaneousHi together, If your projects gets opened veeery slowly, then one reason for this could be hidden result tables They have been closed, but they are not directly visible in the GUI, only through the menu. We've seen projects with huge sets of hidden result tables. In future CAESES versions, you will get asked whether you want to close or (this is new!) remove a result table. This will hopefully avoid that one simply closes and forget about a result table. We'll see... Hope this helps... Joerg
Scallops Modeling for Turbine Wheels
Jörg posted a topic in General ModelingHere is a recent article about turbine wheel optimization where the blades and the scallops can be optimized at the same time within a fully-automated process. Such a "complete" and variable model allows you to consider the aerodynamic performance (CFD) and the stress characteristics of each generated design. Comes with a set of nice animations.