Optimal ratio of bend channel in centrifugal compressor

2008, Volume 2, Issue 4

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Frontiers in Energy >> 2008, Volume 2, Issue 4 doi: 10.1007/s11708-008-0084-4

Optimal ratio of bend channel in centrifugal compressor

1.School of Energy and Power Engineering, Xi'an Jiaotong University; 2.Shenyang Blower Works

Available online: 2008-12-05

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Abstract

A numerical investigation on the flow in a bend channel by coupling the impeller with the vaneless diffuser in a centrifugal compressor with different ratios (bend radius to bend channel width ) is presented. The jet-wake effect of the impeller outlet is considered and flow pattern in the bend channel and the performance of the centrifugal compressor stage are investigated. The results indicate that there is an optimal ratio for increasing the stage efficiency to the highest for a specific compressor stage. The change in ratio significantly affects the flow angle of the bend channel outlet. The prime reason for the total pressure loss in the bend channel is the wall friction in the bend channel.

Keywords

specific compressor ; different ; centrifugal compressor ; pressure ; impeller

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