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Cross Section |
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Cross Section |
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Ü Volute | Cross Section 
The shape of the cross-section of the volute can be selected here. The general cross section shape is illustrated whereas the radial extension is assumed (radial scaling can be modified above the diagram).
In general, very small cross-sections width should be avoided. The achievable cross-section shape strongly depends on manufacturing and the space available.
Following cross section types are available:
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Rectangular
most simple cross-section shape; cannot be achieved in cast parts; only sensible for low specific speeds, since otherwise the cross-section becomes too large |
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Trapezoid
cannot be achieved in cast parts; the angle δ can be specified; results in a flatter cross-section than a rectangular cross-section, with less intense secondary flow |
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Round - symmetric
simple geometry with a beneficial stress distribution; does not develop on rotation surfaces |
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Round - asymmetric, external
more favorable secondary flow structure than with a symmetrical cross-section; often with mixed-flow impellers
Strictly external: cross sections don't fall below inlet radius
Open to right: asymmetric development to right (pos. z-direction) |
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Round - asymmetric, internal
limitation of radial extension; additional bend necessary
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Bezier - Rectangle type
analogous with Rectangle; with chamfers (cast radii)
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Bezier - Trapezoid type
analogous with Trapezoid; with chamfers (cast radii)
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Line segments
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Under Display options, changes can be made which affect only the graphics.
Page url: http://www.cfturbo.com/fileadmin/content/manual/en/index.html?cross_section.html
