NDLI: Development and Application of Fan Noise Prediction Method to Axial and Centrifugal Fan

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Lee, Duck-Joo Jeon, Wan-Ho Chung, Ki-Hoon
Copyright Year	2002
Abstract	Numerical predictions of fan noise have not been studied extensively. This is due to the scattering effect of the fan casing, duct and the difficulty in obtaining aerodynamic acoustic source. New method to predict the fan noise and performance is developed and used to calculate various fan noise problems. A vortex method is used to model the fan and to calculate the flow field. Acoustic pressures are obtained from the unsteady force fluctuations of the blades using an acoustic analogy. But the acoustic analogy can be applied only in the free field in general. In order to consider the solid boundary effects of the casing, the newly developed Kirchhoff-Helmholtz BEM (Boundary Element Method) is introduced. With the above-mentioned method, the flow field and sound field of centrifugal and axial fan were calculated. Reasonable results are obtained not only for the peak frequencies but also for the amplitudes of the tonal sound. Also, in the predicted sound field, we can see the scattering effect of duct and casing.
Sponsorship	Fluids Engineering Division
Starting Page	987
Ending Page	992
Page Count	6
File Format	PDF
ISBN	0791836169
DOI	10.1115/FEDSM2002-31209
e-ISBN	0791836002
Volume Number	Volume 2: Symposia and General Papers, Parts A and B
Conference Proceedings	ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
Language	English
Publisher Date	2002-07-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Noise (sound) Radiation scattering Scattering (physics) Blades Ducts Electromagnetic scattering Vortices Boundary element methods Fluctuations (physics) Acoustics Flow (dynamics) Sound pressure
Content Type	Text
Resource Type	Article

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Computational Noise Prediction of a Centrifugal Fan

A Numerical Study of the Blade Passing Frequency Noise of a Centrifugal Fan

Experimental Determination of the Tonal Noise Sources in a Centrifugal Fan

Unsteady Flow Field and Noise Generation in a Centrifugal Pump Impeller With a Vaneless Diffuser

Experimental and Numerical Investigation of the Aerodynamic Noise Radiated From a Centrifugal Blower

Experimental and Unsteady Numerical Investigation of the Tip Clearance Noise of an Axial Fan

Fan Casing Noise Radiation

Experimental and Numerical Investigation of the Tip Clearance Noise of an Axial Fan

Prediction of the Blade Trailing-Edge Noise of an Axial Flow Fan

Development and Application of Fan Noise Prediction Method to Axial and Centrifugal Fan

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