For Freefly's AltaX aircraft, we have been optimizing their current blades using Aeolus ASP. The resulting blade shape proposed by the optimizer has been machined from Aluminum and tested a few days ago.
That is a very good agreement between simulation and test. We are now prototyping another blade that was found using Aeolus ASP promising approx. 19% efficiency gains. Results will be posted here... :)
Version 4.21 released (Download)
Aeroelasticity with Aeolus ASP
Next Generation Propeller Blades: +18% endurance for UAVs?
Compared to legacy UAV props in the 33 inch range, +18% more efficient prop shapes were found using the numerical shape optimization feature of Aeolus ASP. As we move torwards thinner airfoils and higher aspect ratio blades, aeroelasticity and manufacturing feasibility becomes increasingly challenging. We use FEM and numerical aeroelasticity analysis based on a week coupling of Aeolus ASP and NX Nastran, providing a feedback loop between aerodynamic loads and structural displacement.
Version 4.20 released (Download)
Reverse Engineering using Aeolus ASP
Check out our report on aerodynamic analysis of an existing propeller blade. Simulation results and OEM specs differ by less than 6% on thrust and shaft power.
Version 4.19 released
Version 4.18 released
KNOWN ISSUES to be resolved with the next release:
On propeller blade shape optimizations: Global vs. local optimum
Specifically for propeller shape optimizations, version V4.14 sometimes runs into local optima resulting in not-so-feasible (yet interesting) results, such as this one:
The main reason is, that propeller shape optimization problems have a very high modality (that is, there are many local optima) and the global optimum is more challenging to find. If you restart your optimization case multiple times and each time get a different result, then its a good indication that these are local optima and the optimizer struggles to find the global optimum.
To improve the optimization robustness, the algorithms in Aeolus ASP are getting tweaked at the moment. One example of improved robustness is shown below on a an eggholder test function. The left picture uses the current optimizer from Version 4.14 which exhibits limited design space exploration, whereas the right picture shows the new one to come in the next version. and which finds the global optimum
Here is a teaser for some more robust blade shape optimization in the upcoming version. Also, you can see that surface smoothing is now available :)
A place for discussions and suggestions:
We’re using GitHub Discussions as a place to connect with other members of our community. We hope that you:
Version 4.14 released (Download)
29.09.2020 - Version 4.8 released
17.09.2020 - Version 4.5 released
06.09.2020 - Version 4.3 released
20.01.2020 - Version 4.2 released
12.01.2020 - Version 4.1 released
Happy new year - Aeolus ASP is now free and does not require any licence :)
NEW FEATURE: Propeller blade analysis
05.03.2019 - Version 4.0 released
NEW FEATURE: Propellers
NEW FEATURE: Unit system
28.01.2019 - Version 3.11 released
NEW FEATURE: First propulsion parameters (Engines and Propeller feature to come soon)
Default penalty factors improved for different optimization constraints.
Increased resolution of carpet plots.
Default viscous drag coefficient changed to a more typical value, which can be used for most cases (at Reynolds numbers greater than 200 000)
04.01.2019 - Version 3.10 released
NEW FEATURE: Model export to CAD
18.11.2018 - Version 3.9 released
09.11.2018 - Version 3.8 released
03.11.2018 - Version 3.7 released
NEW FEATURE: Parameter studies feature
23.09.2018 - Version 3.6 released
NEW FEATURE: Flaps
15.09.2018 - Version 3.5 released
02.09.2018 - Version 3.4 released
21.08.2018 - Version 3.3.1 released
Third-party libraries updated for stability and performance
Improved Windows Installer
12.08.2018 - Version 3.3 released
Easy access to the Quick-Start and User Guide, tutorials, and examples
through a Welcome Dialog at start-up, and a new QuickStart menu item
08.07.18 - Version 3.2 released
Licence check shows warning message when there is no internet connection.
03.06.2018 - Version 3.1 released
02.06.2018 - Version 3.0 released
NEW FEATURE: Multiple wings
NEW FEATURE: Additional 3D plots
NEW FEATURE: Nacelle
25.03.2018 - Version 2.5 released
12.02.2018 - Version 2.4 released
NEW FEATURE: Constrained optimization
31.01.2018 - Version 2.3 released
This is the initial release of Aeolus Aero Sketch Pad.