Advanced International Journal for Research

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Numerical Investigation of Aerodynamic and Acoustic Performance of a Centrifugal Blower

Author(s) Dr. Jayahar Sivasubramanian, Mr. Zaid Paloba
Country India
Abstract A detailed numerical evaluation of a centrifugal blower's aerodynamic and acoustic performance is presented. In particular, the impact of the blade chord length and trailing edge configurations on the performance is explored. The blower has a forward-curved type blade impeller with 32 blades on each side that operates at 3000 rpm. The computational domain was methodically modelled and rigorously analyzed using the Multiple Reference Frame (MRF) approach and the SST k-ω turbulence model. Variations in blade chord lengths (-5%, +5%, and +10% of the initial length) relative to the original chord length (OCL), as well as modifications to the trailing edge design, for example Rounded Trailing Edge (RTE) and Sharp Trailing Edge (STE), indicated significant impacts on performance characteristics. Parametric study was performed for varying mass flow rates at the outflow (ranging from 100 m3/hr. to 250 m3/hr.) to evaluate the blower's static pressure under various operating conditions. Variations in aerodynamic efficiency and acoustic behavior were observed in the simulations, which were attributed to the change in the curved surface area of blades and due to differences in von-Karman vortex sizes caused by changes in blade chord length and trailing edge arrangement, respectively. These findings give useful information for improving blower performance and efficiency in real-world applications.
Keywords Centrifugal Blower, Aerodynamic Performance, Acoustic Performance, Von-Karman Vortices, Vortex Shedding
Field Engineering
Published In Volume 7, Issue 2, March-April 2026
Published On 2026-04-15
DOI https://doi.org/10.63363/aijfr.2026.v07i02.4924
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E-ISSN 3048-7641
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