Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)
- 2008.03a
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- Pages.168-172
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- 2008
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- 1975-342X(pISSN)
Effect of the Blade Leading Edge on the Performance of a Centrifugal Compressor
- Chu, Leizhe (Institute of Engineering Thermophysics, Chinese Academy of Science) ;
- Du, Jianyi (Institute of Engineering Thermophysics, Chinese Academy of Science) ;
- Zhao, Xiaolu (Institute of Engineering Thermophysics, Chinese Academy of Science) ;
- Xu, Jianzhong (Institute of Engineering Thermophysics, Chinese Academy of Science)
- Published : 2008.03.30
Abstract
Three different geometry shapes of the blade leading edge in a centrifugal compressor were investigated in this paper. Numerical simulation was done to analyze the effect of the leading edge shape on the performance of the centrifugal compressor. The result shows that compared to the blunt leading edge, the circular leading edge will raise the chocking mass flow. The pressure ratio and efficiency will increase obviously. Using elliptical leading edge will get a further improvement on the performance than circular leading edge. The analysis of the flow field shows that the leading edge often causes flow separation near the inlet; using circular leading edge and elliptical leading edge will reduce the separation. What's more, using circular and elliptical leading edge will also reduce the wake loss near the outlet of the impeller. In a centrifugal compressor, using circular or elliptical leading edge on the splitter will improve the pressure loading distribution of main blade near the position of the splitter leading, which will increase the pressure ratio.