Analysis of acoustic propagation of automotive cooler during run up and run down
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AGH w Krakowie
Maciej Kłaczyński   

AGH w Krakowie
Submission date: 2021-06-30
Final revision date: 2021-09-22
Acceptance date: 2021-09-23
Online publication date: 2021-09-24
Publication date: 2021-09-24
The modern automotive industry invests more and more in electric drive technology. As a result, new challenges arise in terms of vibroacoustic optimization of the car interior. Components that were once masked by the internal combustion engine are starting to dominate the interior of vehicles. There is therefore a great need for noise reduction. For this purpose, a number of methods of its reduction are used, i.e. component optimization (source), use of active noise reduction systems or passive soundproofing materials. In order to perform the abovementioned noise reduction measures, appropriate measurements and signal analysis should be carried out. This presentation aims to present the measurement of an automotive air cooler in transient states on the stand. Measurements were made using a 3D intensity probe based on the direct measurement of the acoustic particle velocity, in 3 planes in front of the cooler. Then, order tracking analysis was performed for the run-up and coast-down. The results in the form of selected orders of intensity and acoustic particle velocity were compared with classical results made with the use of a microphone at the same measurement points locations.
The work was created as part of research project of Department of Mechanics and Vibroacoustics no. AGH in Kraków. Special thanks to Weles Acoustics LLC for lending the WA301 probe.
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