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http://dx.doi.org/10.5293/kfma.2013.16.2.048

Effects of Blade Back Sweep Angle on the Performance and Flow Field in a Centrifugal Compressor  

Jung, Yohan (포항공과대학교 기계공학과 대학원)
Baek, Je Hyun (포항공과대학교 기계공학과)
Park, Jun Young (한국기계연구원)
Choi, Minsuk (명지대학교 기계공학과)
Publication Information
The KSFM Journal of Fluid Machinery / v.16, no.2, 2013 , pp. 48-53 More about this Journal
Abstract
This paper presents a numerical investigation of the influence of the blade back sweep angle on the performance and flow characteristics in a centrifugal compressor with a vaneless diffuser. Five impellers with different back sweep angles were tested in the flow simulations. It was found that a low back sweep angle could improve the total-to-total pressure ratio and the work coefficient over whole operating ranges. However, the flow field in an impeller with a low back sweep angle produced a more non-uniform velocity distribution at the impeller exit because the wake region was significantly increased. As a consequence, the impeller with a low back sweep angle caused a low diffuser performance.
Keywords
Centrifugal Compressor; Back Sweep Angle; Wake; Performance;
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