Abstract: When the fan blows the air flow through the finned heat exchanger, it will produce a kind of broadband high-frequency noise. Starting from the CFD numerical simulation, studies the noise generated by the airflow through the heat exchanger. First, the CFD method is used to study the influence of different airflow sizes and air inlet directions on the vortex intensity in the fin gap, and then set the guide vanes according to the wind speed distribution on the heat exchanger to prevent high-speed airflow from directly blowing into the heat exchanger, which improves the abnormal noise problem.

Key words: Heat exchanger, CFD, Eddy current noise