Abstract
Axial flow fan is extensively applied in automation control systems for cooling. Improving the rotational speed is undoubtedly an effective method to achieve higher total pressure and larger flow rate. In this paper, the performance of axial flow fan under high rotational speed is investigated by using Computational Fluid Dynamics (CFD). Ffowcs Williams and Hawkings (FW-H) model is used to capture the noise propagation. The results show that with the increase of rotational speed, the input power of the axial flow fan tremendously increases refer to the increase of total pressure. With increasing rotational speed the noise gradually rises. Besides the noise on the pressure side is higher. The characteristics of the axial flow fan provide important reference for designing and applying the axial flow fan under high rotational speed condition.
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