Study on Application of CAE in a Centrifugal Compressor Impeller

Abstract:

CAE technology is the most common method to study properties of impeller in a centrifugal compressor. The fluid field was numerically simulated by CFX program to obtain the distribution rules of pressure, turbulence intensity and erosion wear. Based on fluid-solid interaction, stress and deformation were analyzed by Ansys program. According to the simulation results, the maximum deformation and equivalent stress of the impeller are all located on the junction between the blade trailing edge and the shroud. The most serious damaged part by erosion wear in impeller is on the pressure surface of long blade. The erosion wear area on blade pressure surface caused by particles impact primarily locates on blade trailing edge root and middle part. In the flow field, the turbulent intensity on suction surface is greater than that on pressure surface in the corresponding position and the greatest turbulent intensity is located on the leading edge of suction surface. There is backflow phenomenon around the suction surface of long blade and the short blade has significant effect to reduce backflow. The results of numerical simulation explain some actual impeller failure cases and can be applied to anti-wear impeller design and repair.

• Periodical: Advanced Materials Research (Volume 787)
• Pages: 594-599
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.787.594
• Online since: September 2013
• Authors: Bao Long Gong, Xiu Jie Jia, Guang Cun Wang, Zi Wu Liu
• Keywords: Centrifugal Compressor, Computer Aided Engineering (CAE), Erosion Wear Rule, Flow Field, Fluid Structure Interaction (FSI)

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