Experimental/Numerical Study of Ducted-Fan Noise: Effect of Duct Inlet Shape

AIAA Journal ◽  
2018 ◽  
Vol 56 (3) ◽  
pp. 979-996 ◽  
Author(s):  
Michael Shur ◽  
Michael Strelets ◽  
Andrey Travin ◽  
Julien Christophe ◽  
Korcan Kucukcoskun ◽  
...  
Keyword(s):  
Numerical Study ◽  
Fan Noise ◽  
Noise Effect ◽  
Ducted Fan

Prediction of tonal ducted fan noise

2016 ◽  
Vol 372 ◽  
pp. 105-132 ◽  
Author(s):  
J. de Laborderie ◽  
S. Moreau
Keyword(s):  
Fan Noise ◽  
Ducted Fan

scholarly journals Numerical Study of Ducted-fan Lip Stall Suppression Based on Inflatable Leading Lip Cell

2015 ◽  
Vol 126 ◽  
pp. 158-162 ◽  
Author(s):  
He-Yong Xu ◽  
Shi-Long Xing ◽  
Zheng-Yin Ye
Keyword(s):  
Numerical Study ◽  
Ducted Fan

Numerical calculation of centrifugal fan noise

2006 ◽  
Vol 220 (8) ◽  
pp. 1167-1177 ◽  
Author(s):  
Q Liu ◽  
D Qi ◽  
Y Mao
Keyword(s):  
Numerical Study ◽  
Three Dimensional ◽  
Aerodynamic Noise ◽  
Noise Generation ◽  
Centrifugal Fan ◽  
Fan Noise ◽  
Sound Sources ◽  
Aerodynamic Sound ◽  
Frequency Level ◽  
Sound Levels

A numerical study on the aerodynamic noise generation of an industrial centrifugal fan with forward swept blades is carried out. Three-dimensional numerical simulations of the complete unsteady flowfield in the whole impeller — volute configuration are performed to obtain the aerodynamic sound sources. Then, aerodynamic sound is calculated using the Lowson equation and compared with the measurements. Moreover, the fan is modified for noise reduction by increasing the distance between the impeller tip and the volute tongue and sloping the volute tongue. The sound levels of the modified fan are lower than those of the original one over almost the entire range of frequencies analysed. The blade passing frequency level of the modified fan is decreased by about 15 dB at the design point. The method described and applied in this work provides a good qualitative prediction of the noise generation when designing a new fan, thus facilitating the choice of the lowest noise fan from several feasible alternatives.

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