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Summary
This parametric notebook generates exponentially twisted primary and secondary vanes, all driven by adjustable parameters such as twist rate, vane count, and radial taper.Package Details
| Field | Value |
|---|---|
| ID | parametric-impeller |
| Type | Notebook |
| Author | nTop |
| Version | 1.0.0 |
| nTop Version | 5.45+ |
| Domain | Mechanical |
| Application | Turbomachinery |
| Complexity | Intermediate |
| Tags | turbo, impeller, parametric |
| License | MIT |
| Verified | Yes |
This parametric notebook generates high-fidelity pump geometry by combining a drafted central column with exponentially twisted primary and secondary vanes, all driven by adjustable fluid dynamics parameters like twist rate, vane count, and radial taper.
What you get
- Complex Vane Morphologies: Primary and secondary vanes with independent height and count controls.
- Advanced Twist Control: Exponentially ramped twist rates to optimize flow behavior at the vane tips.
- Manufacturing Ready: Integrated radial draft angles and central column blending for castability or 3D printing.
- Robust Field Logic: Implicit modeling ensures clean Booleans and predictable offsets for downstream shelling or simulation.
Inputs
| Name | Type | Notes |
|---|---|---|
Vanes Max Height | Scalar | Maximum height of the primary vanes. |
Vanes Primary Count | Integer | Total number of primary vanes in the polar array. |
Secondary Vanes Height | Scalar | Height multiplier for the secondary vanes. |
Min Radius | Scalar | The inner radius at the top of the vanes. |
Max Radius | Scalar | The overall outer radius of the impeller. |
Top Vane Taper | Angle | Taper angle of the vane cutouts at the top. |
Linear Twist Rate | Twist Rate | Base twist rate applied to the vanes (deg/mm). |
Top Twist Ramp | Twist Rate | Exponential increase of twist near the vane tips. |
Exp. k Factor | Scalar | Growth factor for the exponential twist ramp. |
Plate Thickness | Scalar | Thickness of the bottom mounting plate. |
Column Radius | Scalar | Radius of the central mounting column. |
Center Blend Radius | Scalar | Radius of the blend between the plate and column. |
Vane Thickness | Scalar | Nominal wall thickness of the vanes. |
Draft Angle | Angle | Radial draft applied to vanes for mold release. |
Hole Radius | Scalar | Radius of the central shaft hole. |
Outputs
| Name | Type | Notes |
|---|---|---|
Final Solid | Implicit Body | The completed impeller geometry, ready for simulation or export. |
Modeling Principles
- Late Trimming: To maintain field integrity, all components are modeled as “infinite” bodies and intersected with a master domain at the final step.
- Normalized Fields: The twist operation uses normalized distance fields to prevent thickness distortion during high-twist maneuvers.
- Interactive Polar Arrays: Utilizes a custom remap-based polar array for faster performance and better field continuity than standard geometry-based arrays.