Volute Design
Volutes are typical casings for radial machines. Their accurate design is essential to the operation and overall efficiency of the machine.
Capabilities
- Definition of the inlet cross-section Single or double spiral, considering flow conditions of the neighboring component
- Various cross-sections Symmetrical or asymmetrical cross-section shapes whose definition may vary in the circumferential direction
- Spiral design according to common design theories Choose between alternative design laws or your own geometric progressions
- Discharge diffuser Tangential or radial outflow direction
- Spiral tongue Choose between different geometric shapes
Design steps for volutes
Applicable to pumps, fans, compressors and turbines
1. Volute inlet
- Definition of inlet width and inlet diameter
- Positioning relative to adjacent components
- Single or double spiral
2. Cross-sections
- Rectangle, trapezoid, circle
- Radius-based
- Free-form geometry, Bezier
- Symmetrical and asymmetrical
- Modify cross-sections in circumferential direction
- External and internal volutes
3. Spiral geometry
- Design laws according to Pfleiderer or Stepanoff
- Option to define own area / radius relation
- Define spiral wrap angle and start angle
- Option to correct cutwater
- Option to correct scaling
4. Discharge diffuser
- Tangential or radial outflow direction
- Free-form geometry
- Round or rectangular end section
- Diffuser length, cone angle
- Option to twist outlet in axial direction
- Option to modify cross-section area distribution
5. Cutwater, tongue
- Simple, fillet or sharp mode
- Various geometry parameters
Volute design made easy
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