A three-dimensional model is created for further optimization of the aerodynamic noise of radial-flow fans.With the radial-flow fan in a subway air-conditioning system as the research object,the 40%section of the sparrowhawk's wing is extracted as a reference to reconstruct the fan's blade.Based on Fluent software and Realizable K-ε model,the flow field and aerodynamic noise of the fan with falcon-wing imitative blades are analyzed by using numerical simulation and sound analogy with FW-H equation.The results show that compared with the original fan,the air volume of the improved fan is increased by 2.67 m³/min,the impeller efficiency is increased by 3.07%,and the noise is reduced by 2.34 dB,which can effectively inhibit the vortex noise and improve the aerodynamic and acoustic performance of the radial-flow fan.
关键词
声学/幅流风机/仿生叶片/流场仿真/气动性能/风机噪声
Key words
acoustics/radial-flow fan/bionic blade/flow field simulation/aerodynamic performance/fan noise
维普
万方数据