Axial Compressor Blade via Stream Section Curve

[Jörg 29]

If you interested in parametric blade modeling for shape optimizations of axial compressors, then first check out the sample "Stream Section" in the documentation browser. It shows how the stream section curve type is used (e.g. specify stacking axis, stream surface, camber etc. for mapping it into the 3D space).

 

If you understand how this curve works, you can directly switch to the sample "Axial Compressor". This sample shows how a blade is generated from the stream section curve. For this purpose, a meta surface can be nicely utilized where radial functions control the shape of the blade. These functions (e.g. stagger, chord, inlet & outlet angles, camber, radii leading edge / trailing edge, blend point positions etc.) can then be modified automatically in optimization loops. Note that the stream section curve is one part of the feature definition that is used for the blade surface generation (via curve engine).

 

Designing such a blade in CAESES-FFW is (still) not completely self-explaining and it requires some knowledge about the basic stuff of CAESES-FFW such as features and general curve modeling. But once you've got it, it is a powerful way of creating parametric blades that are perfectly suited for CFD-driven design & shape optimizations. Note that this is not a black box with only pre-configured blade models but more an environment for setting up fully-customized blades with individual and company-specific section and shape definitions!!!

 

I have attached some screenshots that support this post ...

 

Cheers

Joerg

 

BTW: There is also a feature definition included in the compressor sample which generates the stage by simply rotating the final blade (simple but nice feature to learn more about feature definitions).

[Jörg 29]

If you are interested in centrifugal impeller design, then check out this post:

 

http://www.friendship-systems.com/forum/index.php?/topic/128-centrifugal-impeller-blade-design/