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Chinese Journal of Mechanical Engineering
Erschienen in: Chinese Journal of Mechanical Engineering 2/2017

01.03.2017 | Original Article

Numerical Study of Aeroacoustic Sound on Performance of Bladeless Fan

verfasst von: Mohammad Jafari, Atta Sojoudi, Parinaz Hafezisefat

Erschienen in: Chinese Journal of Mechanical Engineering | Ausgabe 2/2017

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Abstract

Aeroacoustic performance of fans is essential due to their widespread application. Therefore, the original aim of this paper is to evaluate the generated noise owing to different geometric parameters. In current study, effect of five geometric parameters was investigated on well performance of a Bladeless fan. Airflow through this fan was analyzed simulating a Bladeless fan within a 2 m×2 m×4 m room. Analysis of the flow field inside the fan and evaluating its performance were obtained by solving conservations of mass and momentum equations for aerodynamic investigations and FW-H noise equations for aeroacoustic analysis. In order to design Bladeless fan Eppler 473 airfoil profile was used as the cross section of this fan. Five distinct parameters, namely height of cross section of the fan, outlet angle of the flow relative to the fan axis, thickness of airflow outlet slit, hydraulic diameter and aspect ratio for circular and quadratic cross sections were considered. Validating acoustic code results, we compared numerical solution of FW-H noise equations for NACA0012 with experimental results. FW-H model was selected to predict the noise generated by the Bladeless fan as the numerical results indicated a good agreement with experimental ones for NACA0012. To validate 3-D numerical results, the experimental results of a round jet showed good agreement with those simulation data. In order to indicate the effect of each mentioned parameter on the fan performance, SPL and OASPL diagrams were illustrated.
Vorheriger Artikel Kinetic Energy Recovery from the Chimney Flue Gases Using Ducted Turbine System
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Metadaten
Titel
Numerical Study of Aeroacoustic Sound on Performance of Bladeless Fan
verfasst von
Mohammad Jafari
Atta Sojoudi
Parinaz Hafezisefat
Publikationsdatum
01.03.2017
Verlag
Chinese Mechanical Engineering Society
Erschienen in
Chinese Journal of Mechanical Engineering / Ausgabe 2/2017
Print ISSN: 1000-9345
Elektronische ISSN: 2192-8258
DOI
https://doi.org/10.1007/s10033-017-0089-1

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