Without baffles, most impellers styles impose a tangential flow pattern. With baffles, most impellers show their true flow characteristics. Impellers are sorted here by the flow patterns they were intended to create, radial flow impellers and axial flow impellers. Click on any of these images for a larger picture. If you can't find your impeller design here, see if it is stored under Special Impellers . Impeller design data includes impeller dimensions, number of blades, turbulent power number, turbulent flow number, and impeller synonyms. If you see a More Data link, click on it for flow pattern information and possibly non-turbulent power numbers (Np), flow numbers (Nq) and discharge angles as a function of Reynold's Number (Re).