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http://dx.doi.org/10.5139/JKSAS.2011.39.7.596

CFD analysis of the Disk Friction Loss on the Centrifugal Compressor Impeller  

Kim, Hyun-Yop (한양대학교 항공공학과 대학원)
Cho, Lee-Sang (한양대학교 기계공학부)
Cho, Jin-Soo (한양대학교 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.39, no.7, 2011 , pp. 596-604 More about this Journal
Abstract
To improve the total efficiency of centrifugal compressor, it is necessary to reduce the disk friction loss, which is defined as the power loss. In this study, the disk friction loss due to the axial clearance and the surface roughness effect is analyzed and proposed the new empirical equation for the reduction of the disk friction loss. The rotating reference frame technique and the 2-equation k-${\omega}$ SST model using commercial CFD code FLUENT is used for the steady-state analysis of the centrifugal compressor impeller. According to CFD results, the disk friction loss of the impeller is more affected by the surface roughness than the change of the axial clearance. For the minimization of the disk friction loss on the centrifugal compressor impeller, the magnitude of the axial clearance should be designed to the same size compare with theoretical boundary layer thickness and the surface roughness should be minimized.
Keywords
Centrifugal compressor; Disk friction loss; Axial clearance; Surface roughness; CFD;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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