Air Flow Distribution Of A Fan Using CFD Method

Nasrul Hakim , Khalid (2010) Air Flow Distribution Of A Fan Using CFD Method. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

This paper presents a Computational Fluid Dynamics modeling simulation of air flow distribution from a fan at different angle of blade. A fan consists of a rotating arrangement of vanes or blades which act on the air. Fans produce air flows with high volume and low pressure, as opposed to a gas compressor which produces high pressures at a comparatively low volume. An introduction to the nature of the physical fan air flow problem and its significance was elaborated in order to understand the complications involved in the research and thereafter arrive at the objectives. Improper design of blade will affect the performance of cooling process for household electrical fan. To overcome this problem the optimal angle of blade is determine for enhancing heat transfer rate. Knowing the physical situation is crucial in the application of Computational Fluid Dynamics to numerically model and thereby analyze the simulation by using pre-processor GAMBIT 2.3.16 and solver FLUENT 6.3.26. The tasks undertaken to model the geometries of the fan and its surrounding is the first important step. This is followed by meshing and defining the boundary conditions before numerically solving the variables that represent flow fields of the simulation. The numerical redactions of the variables in the form of velocity vectors and contour plots detailing the flow characteristics are then analyzed, compared and verified according to known physical situation and existing experimental data. In order to increase the flow rate and the static pressure of the axial flow fan, the 26° to 30° of blade angle should be adopted. This study has shown that the Computational Fluid Dynamics simulation can be useful tool in optimizing the design of the fan blade angle.

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