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Research Papers: Flows in Complex Systems

Aeroacoustic Analysis of the Tonal Noise of a Large-Scale Radial Blower

[+] Author and Article Information
Aurélien Marsan

Department of Mechanical Engineering,
University of Sherbrooke,
Sherbrooke, QC J1K 2R1, Canada
e-mail: aurelien.marsan@usherbrooke.ca

Stéphane Moreau

Professor
Department of Mechanical Engineering,
University of Sherbrooke,
Sherbrooke, QC J1K 2R1, Canada

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received July 22, 2016; final manuscript received August 15, 2017; published online October 19, 2017. Assoc. Editor: Olivier Coutier-Delgosha.

J. Fluids Eng 140(2), 021103 (Oct 19, 2017) (8 pages) Paper No: FE-16-1475; doi: 10.1115/1.4037976 History: Received July 22, 2016; Revised August 15, 2017

Large-scale radial blowers are widely used in factories and are one of the main sources of noise. The present study aims at identifying the noise generation mechanisms in such a radial blower in order to suggest simple modifications that could be made in order to reduce the noise. The flow in a representative large-scale radial blower is investigated thanks to unsteady Reynolds-averaged Navier–Stokes (URANS) numerical simulations. The radiated noise is calculated, thanks to an in-house propagation code based on the Ffowcs Williams Hawkings' (FWH) analogy, SherFWH. The results highlight the main noise generation mechanisms, in particular the interaction between the rotating blades and the tongue, and the interaction between the rotating blades and the trapdoors located on the volute sidewall. Some modifications of the geometry are suggested.

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References

Choi, J.-S. , McLaughlin, D. K. , and Thompson, D. E. , 2003, “ Experiments on the Unsteady Flow Field and Noise Generation in a Centrifugal Pump Impeller,” J. Sound Vib., 263(3), pp. 493–514. [CrossRef]
Embleton, T. F. W. , 1963, “ Experimental Study of Noise Reduction in Centrifugal Blowers,” J. Am. Soc. Acoust., 35(5), pp. 700–705. [CrossRef]
Lyons, L. A. , and Platter, S. , 1963, “ Effect of Cutoff Configuration on Pure Tones Generated by Small Centrifugal Blowers,” J. Am. Soc. Acoust., 35(9), pp. 1455–1456. [CrossRef]
Datong, Q. , Yijun, M. , Xiaoliang, L. , and Minjian, Y. , 2009, “ Experimental Study on the Noise Reduction of an Industrial Forward-Curved Blades Centrifugal Fan,” Appl. Acoust., 70(8), pp. 1041–1050. [CrossRef]
Gu, Y. , Qi, D. , Mao, Y. , and Wang, X. , 2011, “ Theoretical and Experimental Studies on the Noise Control of Centrifugal Fans Combining Absorbing Liner and Inclined Tongue,” Proc. Inst. Mech. Eng. Part A, 225(6), pp. 789–801. [CrossRef]
Cai, J. , Qi, D. , Lu, F. , and Wen, X. , 2010, “ Study of Tonal Fan Noise Reduction by Modification of the Volute Cutoff,” Acta Acust. Acust., 96(6), pp. 1115–1124. [CrossRef]
Menter, F. R. , 1994, “ Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications,” AIAA J., 32(8), pp. 1598–1605.
Sanjose, M. , and Moreau, S. , 2012, “ Numerical Simulations of a Low-Speed Radial Fan,” Int. J. Eng. Syst. Model. Simul., 4(1/2), pp. 47–58.
Cabral, B. , and Leedom, L. C. , 1993, “ Imaging Vector Fields Using Line Integral Convolution,” 20th Annual Conference on Computer Graphics and Interactive Techniques, Anaheim, CA, Aug. 2–6, pp. 263–270. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.95.8134&rep=rep1&type=pdf
Battke, H. , Stalling, D. , and Hege, H.-C. , 1997, “ Fast Line Integral Convolution for Arbitrary Surfaces in 3D,” Visualization and Mathematics (Experiments, Simulations and Environments), Springer, Berlin, pp. 181–195. [CrossRef] [PubMed] [PubMed]
Laramee, R. S. , Jobard, B. , and Hauser, H. , 2003, “ Image Space Based Visualization of Unsteady Flow on Surfaces,” 14th IEEE Visualization (VIS), Seattle, WA, Oct. 19–24, pp. 131–138.
Ayachit, U. , 2015, The Paraview Guide: A Parallel Visualization Application, Kitware, Inc., Clifton Park, NY.
Magne, S. , Moreau, S. , and Berry, A. , 2015, “ Subharmonic Tonal Noise From Backflow Vortices Radiated by a Low-Speed Ring Fan in Uniform Inlet Flow,” J. Am. Soc. Acoust., 137(1), pp. 228–237. [CrossRef]
Moreau, S. , and Sanjosé, M. , 2016, “ Sub-Harmonic Broadband Humps and Tip Noise in Low-Speed Ring Fans,” J. Am. Soc. Acoust., 139(1), pp. 118–127. [CrossRef]
Liu, Q. , Qi, D. , and Tang, H. , 2007, “ Computation of Aerodynamic Noise of Centrifugal Fan Using Large Eddy Simulation Approach, Acoustic Analogy, and Vortex Sound Theory,” Proc. Inst. Mech. Eng. Part C, 221(11), pp. 1321–1332. [CrossRef]
Sanjosé, M. , and Moreau, S. , 2017, “ Direct Noise Prediction and Control of an Installed Large Low-Speed Radial Fan,” Eur. J. Mech. B/Fluids, 61(Part 2), pp. 235–243. [CrossRef]
Lallier-Daniels, D. , Sanjosé , Moreau, S. , and Piellard, M. , 2017, “ Aeroacoustic Study of a Ring-Shrouded Axial Fan Using Lattice-Boltzmann Simulations,” Eur. J. Mech. B/Fluids, 61(Part 2), pp. 244–254. [CrossRef]

Figures

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Fig. 1

Global view of the aeraulic circuit. Dimensions are given in mm.

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Fig. 2

View of the test case: (a) global view and (b) impeller

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Fig. 3

Sound pressure level at the chimney outlet (dB)—900 rpm (gray)—1000 rpm (black)

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Fig. 4

View of the mesh domains

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Fig. 5

Performance curves—900 rpm and 1000 rpm

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Fig. 6

Pressure rise through the components of the blower: inlet block, rotor, and volute: (a) 900 rpm and (b) 1000 rpm

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Fig. 7

Flow pattern at midplane of the volute—1000 rpm RANS: (a) 64,000 m3/h, (b) 56,000 m3/h, and (c) 49,000 m3/h

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Fig. 8

Inlet flow distortion—1000 rpm URANS

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Fig. 9

Influence of the rotor blade-to-blade cavities—1000 rpm URANS: (a) relative velocity magnitude in a meridian plane and (b) pressure in the midplane of the volute

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Fig. 10

Influence of the trapdoors: (a) pressure at rotor outlet and (b) pressure on the backwall of the volute

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Fig. 11

Division of the wall surface

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Fig. 12

Maximum amplitudes of wall pressure fluctuations: (a) 900 rpm and (b) 1000 rpm

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Fig. 13

Amplitudes of wall pressure fluctuations at 1BPF—–1000 rpm: (a) inlet block, (b) rotor blades, and (c) volute

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Fig. 14

Sound power level: (a) SWL—global and (b) SWL—surface elements (1000 rpm)

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Fig. 15

Directivity of the acoustic radiation at the BPF: (a) inlet, (b) blades root, (c) blades tip, (d) volute frontwall, (e) Volute backwall, and (f) volute sidewall

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