cfturbo-pumps_en泵设计的参考.pdf

CFturbo® PUMPS – MAJOR DESIGN STEPS 1. Main dimensions – Computation of the impeller main dimensions: hub diameter, suction diameter, impeller diameter, outlet width – Use of built-in or user-defined approximation functions for determination of pump parameters 2. Meridional contour – Design of meridional contour by Bezier-splines, arcs and lines or user- defined polylines – Positioning of straight or curved leading edge – Display information pertaining to important geometrical parameters – Computation of the meridional flow by a simple streamline curvature method; display of velocity distributions 3. Blade angles – Selecting blade shape: Free form 3D, General 2D, Circular 2D, Straight 2D, Ruled surface blades, Radial element blades – Blade design on 2 to 11 meridional flow sections – Computation of optimal blade angles considering the contraction of the flow channel and the slip factor – Display velocity triangles and tabular listing of velocity components and flow angles D E S I G N S O F T W A R E F O R R A D I A L M I X E D F L O W P U M P I M P E L L E R S CFturbo® Software Engineering GmbH Unterer Kreuzweg 1 · D- 01097 Dresden, Germany Friedrichstrasse 20 · D- 80801 Munich, Germany Phone +49 351 - 40 79 04 - 79 Phone +49 89 - 189 41 45 - 0 sales@ Fax +49 351 - 40 79 04 - 80 Fax +49 89 - 189 41 45 - 20 4. Mean lines – Definition of mean lines by Bezier splines or user-defined polylines – Coupled or non-coupled manipulation of blade shape – Free choice to determine the wrap angle – Display of blade angle distributions 5