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The influence of wedge diffuser blade number and divergence angle on the performance of a high pressure ratio centrifugal compressor

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Abstract

Wedge diffuser is widely used in centrifugal compressors due to its high performance and compact size. This paper is aimed to research the influence of wedge diffuser blade number and divergence angle on centrifugal compressor performance. The impact of wedge diffuser blade number on compressor stage performance is investigated, and then the wedge diffusers with different divergence angle are studied by varying diffuser wedge angle and blade number simultaneously. It is found that wedge diffuser with 27 blades could have about 0.8% higher adiabatic efficiency and 0.14 higher total pressure ratio than the wedge diffuser with 19 blades and the best compressor performance is achieved when diffuser divergence angle is 8.3°.These results could give some advices on centrifugal compressor design.

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Authors and Affiliations

  1. School of Aeronautics and Astronautics, Central South University, Changsha, 410083, China

    Yi Wang

  2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China

    Ge Han, Xingen Lu & Junqiang Zhu

Authors
  1. Yi Wang
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  2. Ge Han
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  3. Xingen Lu
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  4. Junqiang Zhu
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Corresponding author

Correspondence to Yi Wang.

Additional information

This research was supported by the 7 EU framework project and was carried out within the research project with the acronym TFAST (Transition Location Effect on Shock Wave Boundary Layer Interaction). This research was supported by CI TASK and PL-Grid Infrastructure

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Wang, Y., Han, G., Lu, X. et al. The influence of wedge diffuser blade number and divergence angle on the performance of a high pressure ratio centrifugal compressor. J. Therm. Sci. 27, 17–24 (2018). https://doi.org/10.1007/s11630-018-0979-2

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  • DOI: https://doi.org/10.1007/s11630-018-0979-2

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