FanZ designs efficient high-aspect ratio blades for axial fans. For the required head & flow conditions, FanZ calculates the span-wise variation of chord length & twist of the most optimal sectional profile. The software also predicts the performance and structural robustness of the blade. The output is in the form of ready-to-manufacture DXF format drawing files. More than a dozen customers use FanZ for the design of their cooling tower fans.
FanZ estimates the performance of the axial fan using Blade Element Momentum Theory. This involves breaking the blade down into several small parts along the axis and then determining the forces on each of these small blade elements. The theory uses 2D aerodynamic coefficient tables and several assumptions like steady, inviscid, and incompressible flow. In this method, one equation each for thrust and torque on the blade element is solved and integrated along the span. The method supports fans with a hub-to-tip ratio of less than 0.35. Most axial fans are manufactured nowadays with a composite monocoque construction.
The performance testing is usually conducted as per ISO 5801, DIN 24163, and AMCA 210.07.
