Publication de 6 numéros par an
ISSN Imprimer: 2152-5102
ISSN En ligne: 2152-5110
Indexed in
Effect of Inlet Diffuser Diameter on Flow Pattern and Efficiency of Squirrel Cage Fans with CFD Method
RÉSUMÉ
Inlet is one the basic elements of squirrel cage fans that has a significant effect on fan performance and efficiency. Recently using the CFD calculation methods with sufficient related tools for finding the flow pattern and related parameters, applying modifications and representing proper solutions, has being increased. In the present study to study the effect of inlet diffuser diameter on the fan efficiency and flow pattern, using numerical simulations and experimental validations, three different inlet diffuser diameters are used as inlet instead of inlet nozzle. To simulate these cases some geometries with special additional element, proper mesh pattern and size and proper turbulence model was chosen. It is observed that diameter has a great influence on fan performance and efficiency, more than 14 % for 2 cm difference in diameter. Here performance and efficiency curves of fans with respect to use of inlet nozzle are more flattened with higher magnitude. So fan operation around the best performance point is more stable without significant fluctuation of head pressure and efficiency. Also, the patterns of static pressure, axial velocity, radial velocity and tangential velocity are captured to analyze the effect of inlet mechanism on flow pattern and efficiency.
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Zhang Xilong, Zhang Yongliang, Lu Chenggang, Flow and Noise Characteristics of Centrifugal Fan in Low Pressure Environment, Processes, 8, 8, 2020. Crossref