Reducing Blade Tonal Noise Generated by Vane‐Axial Fans

1973 ◽  
Vol 53 (1) ◽  
pp. 386-386
Author(s):  
J. V. Pierpoint
Keyword(s):  
Tonal Noise ◽  
Axial Fans

Aeroacoustic Study of Tonal Noise Generated by Axial Flow Fans

Volume 1 ◽  
2004 ◽  
Author(s):  
T. Belamri ◽  
G. Wang
Keyword(s):  
Experimental Data ◽  
Axial Flow ◽  
Acoustic Analogy ◽  
Noise Levels ◽  
Tonal Noise ◽  
Torque Distribution ◽  
Axial Fans ◽  
Main Input ◽  
Radial Thrust ◽  
Thrust And Torque

SPLNoise is an aeroacoustic program developed to predict tonal noise generated by low speed axial fans. It is based on a generalization of the acoustic analogy of Lowson. The main input to the program are the radial thrust and torque distribution along the blade. This radial distribution is obtained from a CFD calculation. An automatic link to CFX commercial CFD code was made. Noise testing was performed in the anechoic and reverberant room at the Trane Company. Comparison between predicted noise levels and experimental data is very satisfactory.

A compact active control system for tonal noise reduction in axial fans

Noise Notes ◽  
2007 ◽  
Vol 6 (3) ◽  
pp. 37-46
Author(s):  
Anthony Gerard ◽  
Alain Berry ◽  
Patrice Masson
Keyword(s):  
Control System ◽  
Noise Reduction ◽  
Active Control ◽  
Tonal Noise ◽  
Axial Fans ◽  
Active Control System

Modelling of tonal noise control from subsonic axial fans using flow control obstructions

2009 ◽  
Vol 321 (1-2) ◽  
pp. 26-44 ◽  
Author(s):  
Anthony Gérard ◽  
Alain Berry ◽  
Patrice Masson ◽  
Yves Gervais
Keyword(s):  
Flow Control ◽  
Noise Control ◽  
Tonal Noise ◽  
Axial Fans

Experimental validation of tonal noise control from subsonic axial fans using flow control obstructions

2009 ◽  
Vol 321 (1-2) ◽  
pp. 8-25 ◽  
Author(s):  
Anthony Gérard ◽  
Alain Berry ◽  
Patrice Masson ◽  
Yves Gervais
Keyword(s):  
Flow Control ◽  
Experimental Validation ◽  
Noise Control ◽  
Tonal Noise ◽  
Axial Fans

Aerodynamic Characteristics and Noise Analysis of a Low-Speed Axial Fan

2018 ◽  
Author(s):  
Bo Luo ◽  
Wuli Chu ◽  
Wei Dong ◽  
Xiangyi Chen
Keyword(s):  
Noise Analysis ◽  
Leading Edge ◽  
Aerodynamic Characteristics ◽  
Low Noise ◽  
Axial Fan ◽  
Tonal Noise ◽  
Low Speed ◽  
Optimum Choice ◽  
Aerodynamic Performances ◽  
Axial Fans

Axial fans are widely used in modern industry and new regulations and stringent environmental concerns are prompting manufacturer to design efficient low-noise axial fans. This paper is focused on improving the aerodynamic performances and reducing the tonal noise at BPF and its harmonics by the optimum choice of lean-swept blade and the stacking line for the low-speed axial fan. The aerodynamic characteristics of the axial fan with a shroud are explored by CFD with ANASYS CFX. A hybrid method, SST turbulence model for flow and FW-H equation for acoustics, is chosen to predict the radiated noise. The accuracy and reliability of predicted aerodynamic and aeroacoustics results are verified by comparing both computation and experimental data. A number of modified blades with different leaned angle, swept angle and the stacking lines are modeled and analyzed, and the investigation into the optimum choice of lean-swept blade and the stacking line is conducted according to aerodynamic performances and tonal noise. Q-criterion which can visualize the major flow disturbances is applied for the purpose of identification of acoustic sources. The turbulent flow structures on the leading edge, tip and suction side of the blade are main noise sources. An optimal modification is determined through the analysis of the aerodynamic performances and noise, which is to achieve the desired performances by blade sweep and lean and adjusting the stacking line. The results show that aerodynamic and acoustic performances of the optimized fan are better than that of the original fan and the improvement is more obvious to change the stacking line with centre of gravity compare to blade sweep and lean for the low-speed axial fan.

A Compact Active Control System for Tonal Noise Reduction in Axial Fans

2007 ◽  
Vol 38 (4) ◽  
pp. 12-18
Author(s):  
Anthony Gérard ◽  
Alain Berry ◽  
Patrice Masson
Keyword(s):  
Control System ◽  
Noise Reduction ◽  
Active Control ◽  
Tonal Noise ◽  
Axial Fans ◽  
Active Control System

Experimental study of the effect of the rotor-stator gap variation on the tonal noise generated by low-speed axial fans

2013 ◽  
Author(s):  
Edward Canepa ◽  
Andrea F. Cattanei ◽  
Fabio Mazzocut Zecchin ◽  
Gabriele Milanese ◽  
Davide Parodi
Keyword(s):  
Experimental Study ◽  
Tonal Noise ◽  
Low Speed ◽  
Axial Fans

NUMERICAL ANALYSIS OF THE SWEPT BLADES EFFECT ON THE AERODYNAMIC PERFORMANCE OF AXIAL FANS

2019 ◽  
Author(s):  
Tania Marie Arispe Angulo ◽  
Waldir de Oliveira ◽  
Ramiro Gustavo Ramirez Camacho ◽  
Edna da Silva ◽  
GERMÁN ENRIQUE NIÑO DEL RÍO
Keyword(s):  
Numerical Analysis ◽  
Aerodynamic Performance ◽  
Axial Fans
Sign in / Sign up

Export Citation Format

Share Document