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http://dx.doi.org/10.6108/KSPE.2017.21.1.026

Flow Analysis for Performance Characteristics with Closed Type Impeller Shapes of a Centrifugal Compressor  

Cho, Jongjae (Thermal Energy System Laboratory, Korea Institute of Energy Research)
Yoon, YongSang (Power Systems Division, Engine Development Center, Hanwha Techwin)
Cho, MyungHwan (Power Systems Division, Engine Development Center, Hanwha Techwin)
Kang, SukChul (Power Systems Division, Engine Development Center, Hanwha Techwin)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.21, no.1, 2017 , pp. 26-35 More about this Journal
Abstract
The high-cycle fatigue cracking and the resonance generated in operation of a centrifugal compressor are main cause of the impeller damage. In order to prevent the damage, the impeller is designed or modified to have sufficient strength to withstand the operating condition. The damage prevent design will lead to a change of the flow condition and the performance characteristics of the compressor. In this study, the computational analysis were performed to identify the flow and the performance characteristics. The cases are a scalloped and a increased the blade thickness models with a closed type impeller. As the analysis results, the value of head coefficient and total to total efficiency for the increased the blade thickness model was decreased by each 0.5% and 0.1% than the values of the baseline model. Each value for the scalloped model was increased by 0.4% and was decreased by 1.6%.
Keywords
Centrifugal Compressor; Close Type Impeller; Scallop; Flow Characteristics; Performance Characteristics;
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