Journal article


Experimental investigation of the noise emission of axial fans under distorted inflow conditions


Publication Details
Author(s): Zenger F, Renz A, Becher M, Becker S
Publication year: 2016
Volume: 383
Pages range: 124-145
ISSN: 0022-460X

Abstract

n experimental investigation on the noise emission of axial fans under distorted inflow conditions was conducted. Three fans with forward-skewed fan blades and three fans with backward-skewed fan blades and a common operating point were designed with a 2D element blade method. Two approaches were adopted to modify the inflow conditions: first, the inflow turbulence intensity was increased by two different rectangular grids and second, the inflow velocity profile was changed to an asymmetric characteristic by two grids with a distinct bar stacking. An increase in the inflow turbulence intensity affects both tonal and broadband noise, whereas a non-uniform velocity profile at the inlet influences mainly tonal components. The magnitude of this effect is not the same for all fans but is dependent on the blade skew. The impact is greater for the forward-skewed fans than for the backward-skewed and thus directly linked to the fan blade geometry.



How to cite
APA: Zenger, F., Renz, A., Becher, M., & Becker, S. (2016). Experimental investigation of the noise emission of axial fans under distorted inflow conditions. Journal of Sound and Vibration, 383, 124-145. https://dx.doi.org/10.1016/j.jsv.2016.07.035

MLA: Zenger, Florian, et al. "Experimental investigation of the noise emission of axial fans under distorted inflow conditions." Journal of Sound and Vibration 383 (2016): 124-145.

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