Cetim_Ventil: a Software to Predict the Noise of a Cooling Fan under a Hood

E1 - Noise of Cooling Fans in Automotive Applications

One of the main acoustic sources under the engine hood of the agricultural and building machines is the fan associated with the cooling system. In this case, an acoustic optimization of the system cannot be dissociated from a thermal optimisation.

In a technological context where the power of the machines tends to increase in a space which cannot evolve any more, and where the cooling system is increasingly complex, the global optimization of the system on intuitive bases becomes increasingly difficult. The numerical modelling tools then become essential.

Upstream of the generic computational aeroacoustics software, very powerful but also very expensive in use, remains a place for simpler modelling tools, with limitations on the configurations which they can handle, but easier to use. One presents such a numerical tool, elaborate by associating software elements already existing in Cetim, and by integrating some of the experimental results obtained on former studies. This software has been defined to be usable by industrial design departments, and to allow taking into account the environment effect and the thermal efficiency on the acoustic performances of a cooling fan confined under a hood.