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The International                        UPDATED 28th May 2010
Journal of Ventilation
Published Quarterly www.ijovent.org.uk          Buy Journal  Online 

June 2010 Edition of the IJV now Published

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Paper 6:  Volume 3 No.4 March 2005 Edition

A Cluster Design Approach to Noise Reduction in a Centrifugal Blower

Renjing Cao and Jun Hu

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,
Nanjing, Jiangsu 210016, China  

Abstract

In this paper a cluster design approach is proposed to achieve a good aerodynamic and acoustic performance of a ventilation system while compact dimensions are maintained. Using this approach, a new centrifugal blower has been designed. In addition an advanced measurement system was adopted to test the aerodynamic and acoustic performance of the unit. This was based on a pipe test rig with non-reflection acoustic boundary and was designed to separate the mechanical and airflow generated noise. This measurement device was located at the ventilation room supply diffuser.  By using this measurement system it was shown that the cluster centrifugal blower provides a higher mass flow rate and a lower sound pressure level than a conventional mechanical ventilation system.

Key words:  acoustics, centrifugal fan, mechanical ventilation, system noise.

References

Chong G, Cao R and Huang L: (2001), “Experimental Identification of Aerodynamic and Vibroacoustic Noise in Small Axial Flow Fans”, Proceedings of 8th Congress on Sound and Vibration, 2-6 June 2001, Hong Kong , pp669-676.

Gutin L: (1936) “On the sound field of a rotating airscrew,” NACA TM 1195 (translated from Russian in 1948).

Kameier F and Neise W: (1997) “Experimental Study of Tip Clearance Losses and Noise in Axial Turbomachines and Their Reduction”, ASME Journal of Turbomachinery, 119, (3), pp460-471.

Neise W: (1988) “Fan Noise- Generation Mechanisms and Control Methods”, Proceedings of International Conference on Noise Control Engineering, Avignon, pp767-776.

Neise W: (1992) “Review of Fan Noise Generation Mechanisms and Control Methods,” Proc. of Fan Noise Symposium, CETIM Senlis, pp45-56 

Pei J: (1988) “Control of Fan Acoustic Noise through Motor Design”, Proceedings of International Conference on Noise Control Engineering, Avignon, pp785-788.

Sijtsma P, Rademaker ER and Schulten JBHM: (1998) “Experimental validation of lifting surface theory for rotor-stator interaction noise generation,” AIAA J., 36, (6), pp900-906.

Swirydczuk J: (2002) “Vortex Dynamics of the Stator Wake-Rotor Cascade Interaction,” Journal of Turbomachinery, 124, (2), pp400-412.

Wang H and Tsukamoto H: (2001) “Fundamental Analysis on Rotor-Stator Interaction in a Diffuser Pump by Vortex Method,” Journal of Turbomachinery, 123, (4), pp737-747.

IJV Volume 3 No 4
Contents

Paper 1: Case Studies

Paper 2: Field Measurement

Paper 3: Pre-Heat Window

Paper 4: Buried Pipe

Paper 5: Plane Jet

Paper 6: Centrifugal Blower

Paper 7: Simplified Model

Paper 8: Thermal Comfort

 

 

    

                                              

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