Publisher : The Korean Society of Mechanical Engineers
DOI : 10.3795/KSME-B.2016.40.6.357
Title & Authors
Study on the Performance of a Centrifugal Compressor Using Fluid-Structure Interaction Method Lee, Horim; Kim, Changhee; Yang, Jangsik; Son, Changmin; Hwang, Yoonjei; Jeong, Jinhee;
In this study, we perform a series of aero-thermo-mechanical analyses to predict the running-tip clearance and the effects of impeller deformation on the performance using a centrifugal compressor. During operation, the impeller deformation due to a combination of the centrifugal force, aerodynamic pressure and the thermal load results in a non-uniform tip clearance profile. For the prediction, we employ the one-way fluid-structure interaction (FSI) method using CFX 14.5 and ANSYS. The predicted running tip clearance shows a non-uniform profile over the entire flow passage. In particular, a significant reduction of the tip clearance height occurred at the leading and trailing edges of the impeller. Because of the reduction of the tip clearance, the tip leakage flow decreased by 19.4%. In addition, the polytrophic efficiency under operating conditions increased by 0.72%. These findings confirm that the prediction of the running tip clearance and its impact on compressor performance is an important area that requires further investigation.
Centrifugal Compressor;Running Tip Clearance;Impeller Deformation;Fluid-Structure Interaction;
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