Low noise cooling fan integration in an induction machine application

Johannes Hyrynen, Ari Karjalainen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Many machinery applications require cooling. Cooling is provided normally by fans, which sometimes generate excessive noise even compared to the machine, itself. By adequate design it is possible to reduce the noise generated by the fan in its application. The design process consists of the selection of the fan impeller and design of the casing including the surrounding structures of the fan. A number of various impeller types were experimentally tested in order to find the best solution for an induction machine cooling application without using additional noise control means. The study included axial fans of several diameter and blade angle combinations, two different axial fan designs and radial fans. All the fans were selected to suit the same cooling requirements. The effects of some surrounding structure alternatives were also reviewed. For each fan design both the performance and sound power were measured. The results are presented as performance and specific sound power curves, which give a wider perspective of the fan operation. The results are also reviewed as 1/3-octave band frequency spectra. This study shows that the selection of the fan and design of the arrangement play a significant role considering the sound power generated.
    Original languageEnglish
    Title of host publicationProceedings of the 5th European Conference on Noise Control
    PublisherEuropean Acoustics Association (EAA)
    Number of pages6
    ISBN (Print)88-88942-00-9
    Publication statusPublished - 2003
    MoE publication typeA4 Article in a conference publication
    Event5th European Conference on Noise Control, Euronoise 2003 - Naples, Italy
    Duration: 19 May 200321 May 2003


    Conference5th European Conference on Noise Control, Euronoise 2003


    • induction machine
    • cooling fan
    • noise


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