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CFD and CAA Analysis of Centrifugal Fan for Noise Reduction

International Journal of Computer Applications
© 2014 by IJCA Journal
Volume 86 - Number 7
Year of Publication: 2014
S. Ramakrishna
Vommi Krishna
A. Ramakrishna
K. Ramji

S Ramakrishna, Vommi Krishna, A Ramakrishna and K Ramji. Article: CFD and CAA Analysis of Centrifugal Fan for Noise Reduction. International Journal of Computer Applications 86(7):10-16, January 2014. Full text available. BibTeX

	author = {S. Ramakrishna and Vommi Krishna and A. Ramakrishna and K. Ramji},
	title = {Article: CFD and CAA Analysis of Centrifugal Fan for Noise Reduction},
	journal = {International Journal of Computer Applications},
	year = {2014},
	volume = {86},
	number = {7},
	pages = {10-16},
	month = {January},
	note = {Full text available}


Centrifugal fans usually operate at high rotating speeds and hence generate high levels of noise whose reduction over a broad range of operating conditions is a key concern for the designer. An important first step in this direction is identification of noise sources and its quantification. For this purpose, Computational Fluid Dynamics (CFD) and computational aeroacoustic analyses is performed on centrifugal fans with backward impeller, radial impeller and forward impellers using CFD code FLUENT. To validate these results noise measurements are performed on centrifugal fans with backward impeller, radial impeller and forward impellers. The results so obtained from numerical analyses are compared with the measurement results. It is found that there is good agreement between numerical and experimental results. From these results it is observed that least noise of 92. 6 dB(A) and high flow rate of 0. 399 m3/sec occurs with backward impeller whereas large noise of 102. 5 dB(A) and least discharge of 0. 365 m3/sec is observed with forward impeller. The present study concludes that backward impeller radiates less noise and high discharge compared to radial and forward impellers.


  • Christopher, L. , 1998, Prediction and Reduction of Centrifugal Fan Noises, J. Acoust. Soc. Am. , 103(5):3045-3045.
  • Sean, Wu, 2002, On Sound Generation Mechanism by a Centrifugal Fan, J. Acoust. Soc. Am. , 111(5):2424-2424.
  • Son, Pham Ngoc. , Kim, Jaewon. ,and Ahn, E. Y. , 2011, Effect of Bell Mouth Geometries on the Flow Rate of Centrifugal Fan, J. Mech. Sci. Tech. , 25 (9):2267-2276.
  • Huang, Chen-kang. , and Hsieh, Mu-En. , 2009, Performance Analysis and Optimized Design of Backward Curved Airfoil Centrifugal Fans, Technical Report, ASHRAE, USA.
  • Cao, R, and Hu J. , 2005, A Cluster Design Approach to Noise Reduction in Centrifugal Fan, Int. J. Vent, 3(4):345-352.
  • Moreland, J. B. , 1974, Housing Effect on Centrifugal Fan Noise, J. Sound Vib. , 36(2):191-205.
  • Lu, F. A. , Qi, D. T. , Wang, X. J. , Zhou, Z. , and Zhou, H. H. , 2012, A Numerical Optimization on the Vibroacoustics of a Centrifugal Fan Volute, J. Sound Vib. , 331(10): 2365–2385.
  • Scheit,C. , Karic,B. , and Becker,S. , 2012, Effect of Blade Wrap Angle on Efficiency and Noise of Small Radial Impeller Fan Impellers—A Computational and Experimental Study, J. Sound Vib. , 331(5):996–1010.
  • Prezelj, J. , and Cudina, M. ,2011, Quantification of Aerodynamically Induced Noise and Vibration-Induced Noise in a Suction Unit,Proc. Inst. Mech. Eng. C,225(3):617-624
  • Mao, Y. , Qi, D. , Liu, X. ,and Tang, H. ,2008, Numerical prediction of aerodynamic tonal noise radiated from a centrifugal fan,Proc. Inst. Mech. Eng. A, 222(8):831-842.
  • Mao, Y. , and Qi, D. , 2009, Computation of Rotating Blade Noise Scattered by a Centrifugal Volute,Proc. Inst. Mech. Eng. A, 223(8):965-972.