Numerical Investigation of Flow and Heat Transfer in a Rotor-Stator Cavity with Centripetal Carbon Dioxide Through-Flow

Bo Hu, Xuesong Li, Xiaodong Ren and Jiaxing Lu
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Bo Hu: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Xuesong Li: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Xiaodong Ren: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Jiaxing Lu: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2019, vol. 12, issue 13, 1-15

Abstract: A centrifugal carbon dioxide compressor is a kind of general machine with extensive applications. The geometry of the side chambers of the compressors can be determined by studying the rotor-stator cavity with centripetal through-flow. In this paper, numerical simulations were conducted to predict the characteristics of flow and heat transfer. Three different speeds of rotation and two axial gap widths were considered. The correlations of the core swirl ratios were determined by fitting the results for two axial gap widths. The amounts of the moment coefficients of the disk were predicted. In order to better analyze the temperature field, the radial distributions of the local heat transfer coefficient were numerically investigated. According to the simulation results, the average Nusselt number was found to be dominated by the turbulent flow parameter. It also seemed to be proportional to the moment coefficient at a fixed circumferential Reynolds number.

Keywords: rotor-stator cavity; centripetal; carbon dioxide; flow; moment coefficient; heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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