Volute characteristics of centrifugal fan based on dynamic moment correction method

Abstract

The multi-blade centrifugal fan features an abundance of vanes (>48) and a spiral volute. The flowability and noise characteristics of the centrifugal fan are dependent on the type-line of volute and tongue geometries at the volute exit. The aim of this research was to find a better volute type-line for fan noise reduction without compromising on the performance. First, the viscosity factors of gas were used to modify the type-line shape of the volute by introducing a dynamic moment correction coefficient; a modified volute was then obtained to match the new fan system. Next, the performance of the original fan and retrofit fan were tested. The optimization scheme was verified and the feasibility of the proposed numerical calculation technique was confirmed.

Keywords

Noise source numerical simulation centrifugal fan. far field pressure coefficient

Get full access to this article

View all access options for this article.

References

Neise

. Noise reduction in centrifugal fans: A literature survey. J Sound Vib 1976; 45: 375–403.

Zhang

Wen

et al.

Measurement and analysis of three-dimensional flow in a centrifugal fan volute with large volute width and rectangular cross-section. Proc IMechE, Part A: J Power and Energy 2006; 220: 133–153.

Montazerin

Damangir

Mirzaie

. Inlet induced flow in squirrel-cage fans. Proc IMechE, Part A: J Power and Energy 2000; 214: 243–253.

Montazerin

Damangir

Mirian

. A new concept for squirrel-cage fan inlet. Proc IMechE, Part A: J Power and Energy 1998; 212: 343–349.

Pomfret

Lam

. A new approach to the design of fan volute profiles. Proc IMechE, Part C: J Mechanical Engineering Science 1996; 210: 287–294.

Kim

Jeong

Kim

et al.

Optimization of sirocco fan blade to reduce noise of air purifier using a metamodel and evolutionary algorithm. Appl Acoust 2015; 89: 254–266.

Wen

Mao

et al.

Experimental and numerical study on the inlet nozzle of a small squirrel-cage fan. Proc IMechE, Part A: J Power Energy 2013; 227: 450–463.

Wang Jun, Jiajun Li, Liang Z, et al. The experimental study on influence of volute case and blade shape on performance of double suction multi-blade centrifugal fan. Fan Technology 2017; 59(3): 49–53.

Tajadura

R-B

Suarez

V-S

Cruz

J-P-H

et al.

Numerical calculation of pressure fluctuations in the volute of a centrifugal fan. ASME J Fluids Eng 2006; 128: 359–369.

10.

Zheng

Che

. Experimental study on hydrodynamic characteristics of upward gas-liquid slug flow. Int J Multiphase Flow 2006; 32: 1191–1218.

11.

Koopmann

Fox

. Active source cancellation of the blade tone fundamental and harmonics in centrifugal fans. J Sound Vib 1988; 126: 209–220.

12.

Jeon

Lee

Rhee

. An application of the acoustic similarity law to the numerical analysis of centrifugal fan noise. JSME Int J C: Mech Syst, Mach Elem Manuf 2004; 47: 845–851.

13.

Younsi M, Bakir F, Kouidri S, et al. Numerical and experimental study of unsteady flow in centrifugal fan. In: 7th European turbomachinery conference, Athens, Greece, 2007, pp.175–189.