Effects of inflow conditions on discrete frequency noise generation by small, axial flow cooling fans

1985 ◽  
Vol 78 (6) ◽  
pp. 2150-2150
Author(s):  
Karl B. Washburn
Keyword(s):  
Axial Flow ◽  
Frequency Noise ◽  
Noise Generation ◽  
Discrete Frequency ◽  
Cooling Fans ◽  
Inflow Conditions

Discrete Frequency Noise Generation From an Axial Flow Fan Blade Row

1970 ◽  
Vol 92 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Ramani Mani
Keyword(s):  
Three Dimensional ◽  
Axial Flow ◽  
Acoustic Energy ◽  
Frequency Noise ◽  
Noise Generation ◽  
Two Dimensional ◽  
Axial Flow Fan ◽  
Fan Noise ◽  
Blade Row ◽  
Fan Blade

An analysis is presented which treats the noise generation from an axial flow fan row by given forces including the effects of a moving medium. The linearization of Euler’s equations to yield tractable problems for fan noise is discussed. The three-dimensional problem is decomposed into several two-dimensional problems. Finally, full details are given of a two-dimensional analysis to predict the amounts of acoustic energy, at the blade passing frequency and its harmonics, radiated up and downstream of a blade row due to its interaction with a neighboring row.

scholarly journals Effect of Resonant Environment on Discrete Frequency Noise Generation from a Two-Dimensional Airfoil

2021 ◽  
Vol 1909 (1) ◽  
pp. 012007
Author(s):  
K. Yamada ◽  
M. Furukawa ◽  
S. Sakurada ◽  
T. Mizokami ◽  
S. Aso ◽  
...  
Keyword(s):  
Frequency Noise ◽  
Noise Generation ◽  
Two Dimensional ◽  
Discrete Frequency
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