01 / Challenge
Challenge
Simulation had narrowed the field to six candidate blade profiles, but the differences were inside the margin of error of the model.
Fluid Dynamics Validation — 2025
Impeller Flow Study
Six impeller geometries printed in a single overnight run so a pump manufacturer could test blade profiles against real water.
PETGFDMEngineering
Preparing 3D view
Loading geometry and materials.
- Project
- Impeller Flow Study
- Material
- PETG
- Technology
- FDM
- Print Time
- 11 hours
- Layer Height
- 0.12 mm
- Weight
- 165 g
- Dimensions
- 140 x 140 x 45 mm
- Industry
- Engineering
02 / Design
Design
All six were printed at identical settings and orientation so surface finish could not bias the comparison, each keyed to the same test shaft.
03 / Printing Process
Printing Process
PETG at 0.12 mm with six perimeters for water tightness, printed blade-up on a single plate overnight.
04 / Final Result
Final Result
Rig testing separated the candidates clearly and eliminated four of the six in a single afternoon. The winning profile differed from the simulation favourite.
Gallery
Through the build
Four moments from the job, in the order they happened.
- 01
All six candidates on one plate - 02
Blade profile comparison - 03
Mounted on the test shaft - 04
Flow rig in operation
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Impeller Flow Study
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