<p>Axial flow fans (AFF) are extensively used in various industrial sectors, usually with flows of low resistance and high mass flow rates. The blades, the hub, and the shroud are the three major parts of an AFF. Various kinds of optimization can be implemented to improve the performance of an AFF. The most common type is found to be geometric optimization including variation in the number of blades, modification in hub and shroud radius, change in angle of attack and blade twist, etc. In this analysis, parametric optimization was done on an 11-bladed AFF with a shroud of the uniform radius using ANSYS Fluent. The rotational speed of the fan and the velocity at the fan inlet were the primary variables of the study. For more reliability of the simulations, results are tested with a grid dependency test. Simulations with different viscous models were also compared towards maximum accuracy. The outlet mass flow rate variation, total pressure, and Mach number were studied for both compressible and incompressible flows. Mass flow rate and total pressure with inlet velocity are observed to be linear and exponential respectively. On the other hand, mass flow rate and total pressure have a nearly linear relationship with rotational speed.</p>

Aerodynamic Performance Evaluation of Axial Flow Fan Using Numerical Techniques

Paper Proceedings: https://asmedigitalcollection.asme.org/GTINDIA/GTINDIA2021/volume/85536

ASME 2021 Gas Turbine India Conference (GTINDIA2021)

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