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Parametrical Study of Centrifugal Airfoil Fans by Computational Tools


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DOI: https://doi.org/10.15866/ireme.v14i12.19281

Abstract


Technological advances of CFD methods linked to computational tools allow the partial differential equations system's solution and describe the air mass flow developed by a backward inclined centrifugal airfoil fan through an application of computational tools in a virtual environment. This approach enables inexpensive optimization processes to improve the performance of mechanical components employed in energy transfer systems. In this investigation, CFD tools have been applied for the study and the improvement of fan performance. k-ε turbulence model leads the CFD analysis of the airflow, analyzing the turbulent energy generated by impeller blades in moving the industrial centrifugal fan and its dissipation rate under real working conditions MRFSimpleFOAM solver. OpenFOAM supports this numerical methodology computing a free CFD code based on mathematical algorithms and iterative solutions of the Navier-Stokes equations. A good agreement during the numerical model validation with the experimental data acquired in the test bench has been reached. Parametrical studies are applied in order to analyze the impeller effect on the airflow pressure developed in the industrial centrifugal fan's computational domain. The analysis of variance has been used to verify the multiple linear regression model's quality and to define a mathematical relation between the pressure and the flow rate of the airflow and three impeller geometrical features: number of impeller blades, blade angle, and impeller diameter. The above establishes a predictive methodology and verifies the optimal performance of the industrial centrifugal fan taking into account adjustments in the impeller geometry using computational tools.
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Keywords


ANOVA; Centrifugal Fan; CFD; k-ε; Optimization

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References


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