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Experimental and Numerical Analysis of the Gas Flow in the Axisymmetric Radial Clearance

Author

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  • Damian Joachimiak

    (Institute of Thermal Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

  • Andrzej Frąckowiak

    (Institute of Thermal Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

Abstract

This paper focuses on the analysis of the gas flow in the axisymmetric mini gap bounded by the surface of the top of the labyrinth seal tooth and the surface of the body. It includes the results of experimental research and numerical calculations. Experimental research focused on the analysis of gas flow for six clearance heights in a wide range of pressure drops. Based on this research, we determined the mass flow in the clearance. Using the Saint-Venant equation, we determined the flow coefficient versus the pressure ratio upstream and downstream from the seal. Flow coefficients for various clearance heights obtained from the experiment can be divided into two data groups, the values of which differ significantly. To explain changes in the value of the gas flow coefficient for selected clearance heights, numerical analysis of the said gas flow was performed using the Fluent software. This analysis allowed us to explain the reason for the variability of the flow coefficient. This research can be the basis for determining the change of seal integrity during operation for staggered and stepped seals.

Suggested Citation

  • Damian Joachimiak & Andrzej Frąckowiak, 2020. "Experimental and Numerical Analysis of the Gas Flow in the Axisymmetric Radial Clearance," Energies, MDPI, vol. 13(21), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:21:p:5794-:d:440504
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    References listed on IDEAS

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    1. Rafał Ślefarski, 2019. "Study on the Combustion Process of Premixed Methane Flames with CO 2 Dilution at Elevated Pressures," Energies, MDPI, vol. 12(3), pages 1-17, January.
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    Cited by:

    1. Magdalena Piasecka, 2023. "Heat and Mass Transfer Issues in Mini-Gaps," Energies, MDPI, vol. 16(16), pages 1-6, August.
    2. Damian Joachimiak, 2021. "Novel Method of the Seal Aerodynamic Design to Reduce Leakage by Matching the Seal Geometry to Flow Conditions," Energies, MDPI, vol. 14(23), pages 1-16, November.
    3. Magda Joachimiak, 2021. "Analysis of Thermodynamic Parameter Variability in a Chamber of a Furnace for Thermo-Chemical Treatment," Energies, MDPI, vol. 14(10), pages 1-18, May.
    4. Magdalena Piasecka & Sylwia Hożejowska & Beata Maciejewska & Anna Pawińska, 2021. "Time-Dependent Heat Transfer Calculations with Trefftz and Picard Methods for Flow Boiling in a Mini-Channel Heat Sink," Energies, MDPI, vol. 14(7), pages 1-24, March.

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