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http://dx.doi.org/10.5293/kfma.2016.19.5.005

Numerical Study on Effects of Splitter Chord Length and Pitchwise Location on the Flow Characteristics in a Transonic Centrifugal Compressor  

Lee, Byung Ju (Department of Mechanical Engineering, Graduate School, Korea University)
Kim, Dae Hyun (Department of Mechanical Engineering, Graduate School, Korea University)
Chung, Jin Taek (Department of Mechanical Engineering, Korea University)
Publication Information
The KSFM Journal of Fluid Machinery / v.19, no.5, 2016 , pp. 5-11 More about this Journal
Abstract
The purpose of this study is to design the transonic centrifugal compressor impeller with splitter blades and analyze the flow fields with respect to various splitter blades. Seven impellers with different splitter chord length or pitchwise location were tested by using CFD method. To investigate aerodynamic performance, Mach number distribution and entropy distribution were confirmed. As a result, it is found that the size of transonic region and shock wave location are related to the splitter chord length and pitchwise location. Also the impeller with long chord length of splitter shows higher total pressure ratio but lower efficiency than those of the impeller with short chord length of splitter. In terms of pitchwise location, the impeller with the splitter located in mid-pitch of main blades shows the best performance with respect to pressure ratio and efficiency.
Keywords
Centrifugal Compressor; Chord Length; Entropy; Mach Number; Pitchwise Location; Shock Wave; Splitter; Transonic;
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Times Cited By KSCI : 1  (Citation Analysis)
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