Investigation of the Unsteady Flow and Noise Generation in a Slat Cove

AIAA Journal ◽  
2016 ◽  
Vol 54 (2) ◽  
pp. 469-489 ◽  
Author(s):  
M. Terracol ◽  
E. Manoha ◽  
B. Lemoine
Keyword(s):  
Unsteady Flow ◽  
Noise Generation

Unsteady Flow Distortion Past Blades: Sources of Noise Generation in Rotating Flows

1992 ◽  
Author(s):  
D. O. Rockwell ◽  
O. Akin ◽  
J. H. Kim ◽  
S. Konak ◽  
J. Kuryla ◽  
...  
Keyword(s):  
Unsteady Flow ◽  
Rotating Flows ◽  
Noise Generation ◽  
Flow Distortion

A Numerical Study on the Aeroacoustic of a Vaned Centrifugal Fan

2005 ◽  
Author(s):  
S. Khelladi ◽  
S. Kouidri ◽  
F. Bakir ◽  
R. Rey
Keyword(s):  
Unsteady Flow ◽  
High Speed ◽  
Numerical Study ◽  
Noise Generation ◽  
Centrifugal Fan ◽  
Home Appliances ◽  
Centrifugal Fans ◽  
Radial Forces ◽  
Return Channel ◽  
Dipole Sources

High speed vaned centrifugal fans are widely used in several manufacturing and home appliances. For the designers the noise generated by these machines is one of the most important parameters to be reduced. The centrifugal fan used for this study is made up of an impeller, a diffuser and a return channel. The impeller turns at a relatively high speed about 35000 rpm. The objective of this study is to understand the mechanism of the noise generation within this type of machines. The contribution of the tangential and radial forces is highlighted. These fluctuating forces are due to the unsteady flow at the impeller-diffuser interface. The obtained result shows the effect of monopole and dipole sources on the overall noise.

Numerical Prediction of the Aerodynamic Tonal Noise in a Centrifugal Fan

2002 ◽  
Author(s):  
Sandra Velarde-Sua´rez ◽  
Rafael Ballesteros-Tajadura ◽  
Carlos Santolaria-Morros ◽  
Joaqui´n Ferna´ndez-Francos
Keyword(s):  
Numerical Simulation ◽  
Unsteady Flow ◽  
Numerical Study ◽  
Three Dimensional ◽  
Numerical Results ◽  
Experimental Investigations ◽  
Noise Generation ◽  
Centrifugal Fan ◽  
Tonal Noise ◽  
Interaction Phenomena

In this work, a numerical study about the aerodynamic tonal noise generation in an industrial centrifugal fan with backward curved blades has been carried out. A three-dimensional numerical simulation of the complete unsteady flow on the whole impeller-volute configuration has been performed. Special attention has been focused on the impeller-volute interaction phenomena, analysing the influence of the distance between the impeller and the volute tongue. The numerical results have been contrasted using previous experimental investigations carried out in the same machine.

scholarly journals A Study on Unsteady Flow and Aerodynamic Noise Generation in a Multi-Blade Blower

2013 ◽  
Vol 79 (804) ◽  
pp. 1571-1582
Author(s):  
Masatoshi KAWASAKI ◽  
Hiroyuki HIRAHARA ◽  
Masanori NAKAMURA
Keyword(s):  
Unsteady Flow ◽  
Aerodynamic Noise ◽  
Noise Generation

scholarly journals The Effects of Unsteady Flow Conditions on Vehicle in Cabin and External Noise Generation

2015 ◽  
Author(s):  
Charalampos Kounenis ◽  
David Sims-Williams ◽  
Robert Dominy ◽  
Arganthaël Berson ◽  
Nicholas Oettle ◽  
...  
Keyword(s):  
Unsteady Flow ◽  
External Noise ◽  
Noise Generation ◽  
Flow Conditions

Unsteady flow calculations with a parallel multiblock moving mesh algorithm

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 1021-1029 ◽  
Author(s):  
H. M. Tsai ◽  
A. S. F. Wong ◽  
J. Cai ◽  
Y. Zhu ◽  
F. Liu
Keyword(s):  
Unsteady Flow ◽  
Moving Mesh
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