Effect of diffuser vane setting angle on centrifugal compressor performance

摘要

The effect of a diffuser vane setting angle on the performance of a centrifugal compressor was investigated. 7 vaned diffusers were tested with the same impeller. In order to remove the effect of the throat geometry, all the diffusers were designed to have the same throat area. The test results and the calculation with a simple one-dimensional model showed that the diffuser vane setting angle was one of the most important parameters to predominate the vaned diffuser. The calculation also showed that it would be possible to chose the several vane setting angles without any change of the compressor efficiency at a certain flow rate by the selection of the appropriate area ratios.