Effects of the Variation of Divergence Angle of Vaned Diffuser on the Flow Characteristics of a Small-size Turbo-compressor

소형 터보압축기 베인 디퓨저 확대각 변화에 따른 유동특성 고찰

The flow characteristics of the vaned diffuser were complicated with geometric shapes. We have studied the effects of various vaned diffuser configurations, such as divergence angles and rectangular and conical cross-section shapes. Numerical analyses are carried out for the diffuser and casing. The pressure recovery coefficient was calculated to estimate the performance of the diffuser, and then compared with the measure data. Results show that the shapes and the divergence angles of the diffuser strongly influence on the performance of the small-size turbo-compressor.