Optimazation of the Number of Blades of a Centrifugal Fan
ACKNOWLEDGEMENTS
At the outset we would like to express our profound gratitude to our Project Guide Prof.Madhwesh N., Dept. of Mechanical and Manufacturing, MITManipal, for rendering immense help and guidance to complete this project.
We also wish to express our sincere thanks to Dr.S.Divakara Shetty, Head, Dept. of Mechanical and Manufacturing, MITManipal for the continuous encouragement.
We are also very thankful to our Department Project coordinators, Dr.Krishnananda Rao, Dr. Shiva Kumar and Prof. Ramakrishna Vikas.
We also place on record, our deep sense of gratitude to one and all, who directly or indirectly, have lent their hand in this venture.
SoumyajitMohanty(110909572)
NitishChomal(110909448)
ABSTRACT
In this project, the performance of the centrifugal fan with same outlet diameter having different number of impeller blades is thoroughly evaluated. The impeller outlet diameter, the blade angle and the blade numbers are the most critical parameters which affect the performance of the centrifugal fans. The model fan has a design rotation speed of 1000 rpm and impeller with 11,12,13,14 and 15 numbers of blades has been considered. The characteristics of the centrifugal fan with different number of blades are simulated and predicted on the ANSYS Fluent software. For each impeller, the Static Pressure Rise Coefficient and the Total Pressure Loss Coefficient is calculated. It is seen that the performance of the centrifugal fan increases with the increase in the number of impeller blades.
LIST OF NOTATIONS AND ABBREVIATIONS
CFD – Computational Fluid Dynamics
SP_inlet– Static Pressure at the inlet
SP_imp_in – Static Pressure at the inner side of the impeller
SP_imp_out – Static Pressure at the outer side of the impeller
SP_diff_in- Static Pressure at the inner side of the diffuser
SP_diff_out- Static Pressure at the outer side of the diffuser
SP_out- Static Pressure at the outlet
TP_in – Total Pressure at the inlet
TP_imp_in- Total Pressure at the inner side of the impeller
TP_imp_out- Total