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http://dx.doi.org/10.5293/kfma.2012.15.5.048

Three-Dimensional Noise Analysis of an Axial-Flow Fan using Computational Aero-Acoustics  

Kim, Joo-Hyung (인하대학교 대학원 기계공학과)
Kim, Jin-Hyuk (인하대학교 대학원 기계공학과)
Shin, Seungyeol (인하대학교 대학원 기계공학과)
Kim, Kwang-Yong (인하대학교 대학원 기계공학과)
Lee, Seungbae (인하대학교 대학원 기계공학과)
Publication Information
The KSFM Journal of Fluid Machinery / v.15, no.5, 2012 , pp. 48-53 More about this Journal
Abstract
This paper presents a systematic procedure for three-dimensional noise analysis of an axial-flow fan by using computational aero-acoustics based on Ffowcs Williams-Hawkings equation. Flow-fields of a basic fan model are simulated by solving three-dimensional, unsteady, Reynolds-averaged Navier-Stokes equations using the commercial code ANSYS CFX 11.0. Starting with steady flow results, unsteady flow analysis is performed to extract the fluctuating pressures in the time domain at specified local points on the blade surface of the axial flow fan. The perturbed density wave by rotating blades reaches at the observer position, which is simulated by an in-house noise prediction software based on Ffowcs Williams-Hawkings equation. The detailed far-field noise signatures from the axial-flow fan are analyzed in terms of source types, field characteristics, and interpolation schemes.
Keywords
Axial-flow fan; Dipole source; Ffowcs Williams-Hawkings equation; Unsteady analysis; Blade passing frequency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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