This contribution presents an inverse design method for axial flow fans validated by 3-D RANS numerical simulations. It is based on an analytical performance derivation for different free-vortex distributions combined with a mean-line pre-design tool and supported by a new 2-D cascade potential flow computational method. This computes the 2-D planar cascade flow field and the inviscid deflection angle of thin arbitrary shape airfoils at different machine radii followed by a numerical radial integration into a quasi-3-D method. For validation, several fan designs were investigated, showing the influence of important design parameters as well as the potential of the present method by redrafting an industrial fan. The 2-D planar potential cascade code was validated against the Weinig’s coefficient diagram for flat plate and circular arc cascades.
- International Gas Turbine Institute
Application of an Inverse Cascade Analytical and Numerical Design Method Used in the Design of Axial Fans
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Miclea-Bleiziffer, M, Epple, P, Smith, H, Semel, M, & Delgado, A. "Application of an Inverse Cascade Analytical and Numerical Design Method Used in the Design of Axial Fans." Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 4: Cycle Innovations; Fans and Blowers; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Oil and Gas Applications. Vancouver, British Columbia, Canada. June 6–10, 2011. pp. 457-470. ASME. https://doi.org/10.1115/GT2011-45860
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