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http://dx.doi.org/10.6112/kscfe.2013.18.1.007

NUMERICAL STUDY OF NON-UNIFORM TIP CLEARANCE EFFECTS ON THE PERFORMANCE AND FLOW FIELD IN A CENTRIFUGAL COMPRESSOR  

Jung, Y.H. (Dept. of Mechanical Engineering, POSTECH)
Park, J.Y. (Korea Institute of Machinery and Materials)
Choi, M. (Dept. of Mechanical Engineering, Myongji Univ.)
Baek, J.H. (Dept. of Mechanical Engineering, POSTECH)
Publication Information
Journal of computational fluids engineering / v.18, no.1, 2013 , pp. 7-12 More about this Journal
Abstract
This paper presents a numerical investigation of the influences of various non-uniform tip clearances on the performance and flow field in a centrifugal compressor. Numerical simulations were conducted for three centrifugal compressor impellers in which the tip clearance height varied linearly from the leading edge to the trailing edge. The numerical result was compared with the experimental data for validation. Although the performance improved for low tip clearances, a smaller tip clearance at the trailing edge reduced the overall tip leakage flow more effectively than a smaller tip clearance at the leading edge. Therefore, a smaller tip clearance at the trailing edge lowered the mixing loss caused by interactions between the tip leakage flow and the main passage flow.
Keywords
Centrifugal Compressor; Non-uniform Tip Clearance; Tip Leakage Flow;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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