Aerodynamic noise is a rising source of concern for fans and blowers manufacturers across all industries, but particularly so in domestic appliances applications.
Considerable development effort is dedicated to improving the design of fan rotors to meet the contrasting requirements for high efficiency, high pressure rise and low noise. The developments in Computational Fluid Dynamics (CFD), Computational Aeroacoustics (CAA) and experimental measurements in Anechoic chambers have improved our understanding of the sources of noise in fan and blower rotors. However, the design of fans with improved efficiency and lower noise and vibration still requires considerable computational and experimental resources and relatively long development times. In an earlier article [1], it was shown how by using an inverse design based optimization strategy it is then possible to cover a large design space by relatively small number of design parameters for the fan rotor and hence reduce considerably the computational resources required to optimize the fan or blower rotor geometry for both lower noise and higher efficiency.
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