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  • Influence of the shape of the blade tip on the emitted noise in the air-gap between the rotor and the housing of an axial fan
    Milavec, Matej ...
    The paper presents influence of the rotor blade tip shape of an axial fan on the emitted noise and on its aerodynamic characteristic. Appropriate measurements were first performed on the integral ... level of the same rotor with the two blade tip shapes: blade tip configuration A where the blade tip has the form of the prolonged basic blade, and configuration B with the winglet where the tip was slightly pushed towards the suction side of the blade. Moreover results of local pressure and sound pressure measurements in the area of the air gap made possible detailed analysis of the avarage pressure distribution and its time variance. The results showed strong dependence of the blade tip design on the emitted noise distribution, whereas changes of the aerodynamic characteristic with both tip designs were hardly noticed. The correlation between the emitted sound power level of the fan and the air pressure variance enabled to locate mechanism and origin of the noise generation in the zone between two consecutive rotor blades.
    Vir: Forschung im Ingenieurwesen. - ISSN 0015-7899 (Vol. 78, iss. 3/4, Dec. 2014, str. 107-119)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2014
    Jezik - angleški
    COBISS.SI-ID - 13724955
    DOI

vir: Forschung im Ingenieurwesen. - ISSN 0015-7899 (Vol. 78, iss. 3/4, Dec. 2014, str. 107-119)
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