TP24-19 Aero-Acoustic Analysus of Industrial Axial Fans and Resulting Ultra-Low Noise Solutions

Nowadays, noise is one of the main aspects of modern pollution. In this regard, a lot of efforts have been done to reduce the noise generated by industrial axial fans while trying to keep the resulting lower noise solutions in a reasonable range of cost. This is pushing designers to continuously develop new types of profiles or optimize the existing ones. In this regard, given the noise generated by fans is strictly connected to the airflow turbulence around the blades, it is important to understand how the blade shape affects the amount of vortexes produced and consequently, the noise produced. The scope of the present study is to show how it was possible to address Cofimco research and laboratory tests in the development of new ultra low-noise patented solutions for industrial axial fans used on cooling towers and air-cooled heat exchangers in general, starting from a well consolidated fan blade design, through fluid dynamic simulations and aero-acoustic analysis.