E.E. Elhadi
School of Energy and Power Engineering, Huazhong University of Science and Technology
Wuhan, 430074, China
Wu Keqi
School of Energy and Power Engineering, Huazhong University of Science and Technology
Wuhan, 430074, China
ABSTRACT
This work aims to study and analyze the behavior of flow in axial flow fan. Numerical simulations were carried out based on Navier-stocke equations coupled with k – ε Turbulence model with standard wall function. These simulations were applied to axial flow fan which consists of nine rotor blades and fifteen stator blades. These blades were designed by modified quasi-three dimensional design program code. In the present work, different flow phenomena which occur in axial flow fan were presented and interpreted at different regions with special concern to the rotor exit and stator regions. In order to study the behavior and mechanism of these phenomena, different flow parameters (velocity components, pressure and turbulent intensity) were calculated at different regions and at different flow rate coefficients. It is found that high flow rate causes higher vortex flow than low flow rate, mainly due to existence of the adverse pressure and hence a reverse flow at high flow rate. This is clearly observed in the stator region which negatively affected by increasing the flow rate and the stator became inefficient. It has been also found that, high flow rate causes a vortex flow at stator pressure side while the lower flow rate causes a vortex flow at stator suction side. This study shows that decrease in flow rate causes wider range of wake and vortex at the rotor exit than that caused by the other cases of flow rate. Finally in order to validate the present simulation, the obtained results were compared with the available literature results and it was found that their physical behavior agree quite well.
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How to cite this article
E.E. Elhadi and Wu Keqi, 2002. Simulation of Vortex Flows in Axial Flow Fan Using Computational Fluid Dynamics. Information Technology Journal, 1: 242-249.
DOI: 10.3923/itj.2002.242.249
URL: https://scialert.net/abstract/?doi=itj.2002.242.249
DOI: 10.3923/itj.2002.242.249
URL: https://scialert.net/abstract/?doi=itj.2002.242.249
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