When importing geometries of relatively small impellers or diffusers of e.g. automotive turbochargers, that have diameters in the order of
10 ... 30 millimeters, BladeEditor may have problems building the geometry correctly or adding new features like revolving cut-offs and fillets.
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The internal Parasolid geometry kernel of DesignModeler, which is also used to create the 3D geometry model from a BladeGen BGD file, works in units of [mm]. This can lead to geometry creation problems when working with geometry sizes in the order of several millimeters. To properly import the geometry into BladeEditor and add additional features, the following procedures has been found to be useful: 1. In BladeGen, save the length units to the BGD file: "Model / Properties / Model units --MM", or set the model units under "File / Preferences". 2. Save the BGD file. 3. Open "New Geometry" in Workbench DesignModeler and set the "Desired Length Unit" to Millimeter in the appearing popup window. 4. Open the BGD file with "Blade Editor --> Import BGD file". 5. Here set the "Unit Preference" to "Microns", leave the rest of settings as defaults (especially use Streamwise Lofting). 6. Import the blade geometry and continue working as usual. |
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