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Optimum Design for Noise Reduction of a Two-Bladed Propeller Fan

Title
Optimum Design for Noise Reduction of a Two-Bladed Propeller Fan
Author
정진태
Keywords
AXIAL-FLOW FANS; AEROACOUSTIC PERFORMANCE; AIR-CONDITIONER; BLADE; OPTIMIZATION; FIELD
Issue Date
2015-09
Publisher
S HIRZEL VERLAG
Citation
ACTA ACUSTICA UNITED WITH ACUSTICA, v. 101, No. 5, Page. 920-927
Abstract
Numerical simulations were performed to investigate the sound generation mechanism of a propeller fan in the outdoor unit of an air conditioner. The vortex and separation flow around two- and three-bladed propeller fans were analyzed to locate the sources of noise. A two-bladed fan usually has a lower flow rate than a three-bladed fan at the same rotating speed. In general, a two-bladed fan should increase the rotating speed to obtain the same amount of flow rate as a three-bladed fan. The increased rotating speed of a two-bladed fan may results in a louder noise comparing a three-bladed fan. To overcome this drawback, an optimized two-bladed fan was proposed by increasing the solidity and pitch angle. During optimizing the two-bladed fan, the relative priorities of the design parameters were evaluated to identify the most important, and these parameters were then optimized using the response surface methodology. The overall sound pressure level (OASPL) of the new optimized two-bladed propeller fan was 5.2 dB lower than that of previous two-bladed fans and 1.2 dB lower than that of the optimized three-bladed fan.
URI
http://www.ingentaconnect.com/content/dav/aaua/2015/00000101/00000005/art00007http://hdl.handle.net/20.500.11754/39321
ISSN
1610-1928; 1861-9959
DOI
10.3813/AAA.918887
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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