Author(s)

Tao Liu, Yingkun Zhang, Kunhang Li, Yu Wang, Jingyin Li^*

School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, China.

In this paper, the optimization scheme of a centrifugal fan under the constraints of the total pressure difference, efficiency and shaft power was carried out. The blade inlet angle ß_1A and the blade outlet angle ß_2A of the centrifugal impeller were optimized using the Response Surface Methodology (RSM). Nine optimization cases were presented. The aerodynamic performance and the flow field of the optimized model were carefully compared with the original model. The results show that the total pressure difference and the total-pressure efficiency increase by 5.7% and 4.2% respectively after the optimization. Compared with the original fan, the flow field inside the impeller of the optimized fan has been improved. The flow separation existing around the blade suction surface outlet is suppressed significantly. For fields in the volute, the optimization scheme has reduced the local vortex intensity and weakened the vortex scale. The flow field stability around the volute tongue is also correspondingly improved.

Centrifugal Fan, Optimization, Response Surface Methodology

Liu, T. , Zhang, Y. , Li, K. , Wang, Y. and Li, J. (2019) Aerodynamic Optimization of a Centrifugal Fan Using Response Surface Methodology. Open Journal of Fluid Dynamics, 9, 92-105. doi: 10.4236/ojfd.2019.91007.