simturb/beltrami

Design of turbomachine blade profile

FreeCAD Beltrami Workbench

Design a turbine blade profile within FreeCAD

Usage

You always start from an existing design. Then you just have to modify it. You can start from the original design nested in Beltrami or load an example that comes close to your goal.

Documentation

A user manual can be found online

Note: All the documentation has been generated in French. However, your web browser translator works very well. MS Edge seems to have the best friendly translator.

Here is the video that presents the Beltrami workbench: https://youtu.be/O_abwUuA4Ec

Prerequisites

• FreeCAD v0.20.1 and higher
• FreeCAD Curves workbench version 0.5.12 or higher. Available via the Addon Manager.

Installation

Beltrami workbench is available for install via the FreeCAD Addon Manager.

For more details about the installation process reference the manual.

Theory

Background on the theory behind Beltrami can be found in this section of the manual.

Examples

See the Examples section of this repository to find the provided examples of Beltrami in action.

Francis Turbine Blades

Kaplan Turbine Blades

Centrifugal Pump Blades

Radial Cascade Blade

Discussions/Feedback/Support

• Email contact: [email protected]
• Dedicated FreeCAD forum thread
• Bugs: https://github.com/Simturb/Beltrami/issues (please discuss on the forum thread beforehand)
• Dedicated YouTube channel/playlist YouTube SimTurb/Beltrami

Licence

Beltrami workbench is released under the LGPL2.1+ licence. See LICENSE file.

Warning

This Beltrami workbench is in ALPHA state along with the Curves WB on which it is based.

Release notes

### Release 1.0.8.1 :
-Internal code for B-spline modified, Radius replaced by Weight, initial Weight is now 1 adimensional.
-Variables in Tableau_pilote displaced and modified accordingly, variables Poids_entree and Poids_sortie.

### Release 1.0.8 : 
- Implements surfaces with better tangent continuity at leading edge. 
- Modifies slightly user interface (some names are changed)
- Solves minor bugs
- Optimises the structure of the code
- Previous files are not compatible. From Interface_Usager, you simply have to transfer data from the sketch Meridien (12 2D points) and the spreadsheet Tableau_Pilote (copy-paste). And, of course transfer data from the FeaturePython Parametres.
- Be sure to update Curves WB

beltrami's Issues

Roadmap?

Are there more features being planned for this workbench ?

README: having release notes but hiding previous releases in a collapsed div

Would it be possible to have the release notes (https://github.com/Simturb/Beltrami#release-notes) for latest release showing and then any previous release notes added inside a collapsed div. This way the README isn't cluttered and the previous changes are accessible with a simple click.

calculate optimum impeller blade pitch, impeller diameter and required impeller blade area ?

Perhaps this software could be expanded to calculate optimum impeller blade pitch, impeller diameter and required impeller blade area.

Please read:
http://www.mh-aerotools.de/airfoils/javaprop.htm

Cannot find icon: ~/.FreeCAD/Mod/Beltrami/Resources/Icons/beltrami.svg

Icons can't be find

18:44:41 Cannot find icon: ~/.FreeCAD/Mod/Beltrami/Resources/Icons/beltrami.svg 18:44:53 Cannot find icon: ~/.FreeCAD/Mod/Beltrami/Resources/Icons/coldStart.svg 18:44:53 Cannot find icon: ~/.FreeCAD/Mod/Beltrami/Resources/Icons/modif.svg

OS: Ubuntu 20.04.3 LTS (ubuntu:GNOME/ubuntu)
Word size of FreeCAD: 64-bit
Version: 0.20.25645 (Git) AppImage
Build type: Release
Branch: master
Hash: 37d9757399b4c2ec30318eb88d7cd7c508246345
Python version: 3.9.7
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.2
Locale: French/France (fr_FR)

I think icons folder should be rename to "Icons"
or
"Icons" occurences in InitGui.py should be replace by "icons"
---self.__class__.Icon=FreeCAD.getUserAppDataDir()+"Mod"+"/Beltrami/Resources/Icons/beltrami.svg" +++self.__class__.Icon=FreeCAD.getUserAppDataDir()+"Mod"+"/Beltrami/Resources/icons/beltrami.svg"

Don't forget to update version info in `package.xml`

README: FreeCAD prerequisitie version

Add support for translation of the strings

It would be great to have support for translatable strings.
Currently it's in two languages:

Cancel

If i already have a 2D blade profile (discrete points), how do you use it?

Thank you for sharing it. I recently wrote a script for parameterizing turbine blade profiles that generates a 2D blade profile (outputting a set of discrete points). I would like to use Beltrami to create a 3D model. Is this possible?

_{Sent from PPHub}