Afstudeeropdracht: onderzoek naar de mogelijkheden van Aero-akoestische simulaties binnen ventilatiesystemen

We are increasingly being asked by the market whether and how aero-acoustic simulations can be used in the low-noise development of products. Too often it is found afterwards that the noise requirements are not met and then adjustments are difficult and expensive. It is therefore desirable to detect and solve noise problems at an early stage. The question is therefore: can aeroacoustic simulations be used effectively for this purpose?

For this assignment we are working together with Brink Climate Systems, experts in ventilation solutions in the civil market. They develop various ventilation systems and test these products against sound requirements in their reverberation chamber. Brink is interested in the possibilities of aero-acoustic simulations during the development process.

For this thesis the first step will be to find out which different aeroacoustic simulation techniques are available to calculate sound based on a flow field. These techniques should be validated in a CFD package on the basis of simple flow fields, whose sound radiation is known. This is, for example, the flow in a curve or around an obstruction in a channel.

Once we have mastered the understanding of these simulation techniques, they can also be applied to the flow generated by a fan in a ventilation system of Brink Climate Systems. Here we will limit ourselves to the duct noise; we will leave out the cabinet radiation. In this way, you will answer the question of whether aero-acoustic simulations can be effectively applied for the early detection of noise problems of this type of ventilation system.