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Simulation and Modeling of Ported Shroud Effects on Radial Compressor Stage Stability Limits

Author

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  • Carlo Cravero

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti (DIME), Università degli Studi di Genova, Via Montallegro 1, 16145 Genoa, Italy)

  • Philippe Joe Leutcha

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti (DIME), Università degli Studi di Genova, Via Montallegro 1, 16145 Genoa, Italy)

  • Davide Marsano

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti (DIME), Università degli Studi di Genova, Via Montallegro 1, 16145 Genoa, Italy)

Abstract

The design features of a centrifugal compressor must guarantee high performance and a wide operating range. The ported shroud was developed specifically to extend the operating limit. It is a passive flow control device based on a cavity for flow recirculation to avoid blade passage blocking in near surge conditions. A CFD simulation campaign using a simplified model identified the differences in the performance of the centrifugal compressor with ported shroud, compared to the baseline case. The use of a stability criterion to determine the limit mass flow rate, developed in a previous study by the authors, highlighted and quantified the extension of the surge margin in the case with ported shroud for different rotational speeds. An increase in the surge margin of 11% was detected at design speed, but with a lower trend at higher speeds. An in-depth flow analysis showed the main physical mechanisms in the compressor that occur for different operating conditions: at near surge conditions the cavity recirculates the low momentum flow located in the inducer region; it re-energizes the mainstream decreasing the circumferential velocity component; an improvement of up to 7% of the pressure ratio was obtained. Instead, at best efficiency conditions the flow recirculation worsens the performance by reducing the flow incidence at the rotor leading edge. Finally, using unsteady simulations with a complete 3D model and with the application of the stability criterion it was possible to confirm that the ported shroud can effectively extend the operating range.

Suggested Citation

  • Carlo Cravero & Philippe Joe Leutcha & Davide Marsano, 2022. "Simulation and Modeling of Ported Shroud Effects on Radial Compressor Stage Stability Limits," Energies, MDPI, vol. 15(7), pages 1-20, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:7:p:2571-:d:785086
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    References listed on IDEAS

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    1. Mamdouh Alshammari & Fuhaid Alshammari & Apostolos Pesyridis, 2019. "Electric Boosting and Energy Recovery Systems for Engine Downsizing," Energies, MDPI, vol. 12(24), pages 1-33, December.
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    Cited by:

    1. Carlo Cravero & Davide Marsano, 2024. "Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review," Energies, MDPI, vol. 17(5), pages 1-27, February.
    2. Xing Li & Ning Huang & Guanyan Chen & Yanli Zhang & Yang Zhao & Jie Zhang & Ding Tong, 2023. "Numerical Simulation on the Influence of Inlet Flow Characteristics on the Performance of a Centrifugal Compressor," Energies, MDPI, vol. 16(9), pages 1-24, May.
    3. Jiajia Ji & Jun Hu & Shuai Ma & Rong Xu, 2022. "A Computational Method of Rotating Stall and Surge Transients in Axial Compressor," Energies, MDPI, vol. 15(14), pages 1-17, July.
    4. Jia-Xuan Liu & Fu-Sheng Yang & Tian-Qing Huo & Jian-Qiang Deng & Zao-Xiao Zhang, 2022. "Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor," Energies, MDPI, vol. 15(14), pages 1-17, July.
    5. Ziliang Li & Yanhui Wu & Xingen Lu, 2022. "Performance Improvement of a Highly Loaded Transonic Centrifugal Compressor with Tandem Impeller and Freeform Blade Configuration," Energies, MDPI, vol. 15(24), pages 1-21, December.
    6. Peng Song & Shengyuan Wang & Jinju Sun, 2022. "Numerical Investigation and Performance Enhancement by Means of Geometric Sensitivity Analysis and Parametric Tuning of a Radial-Outflow High-Pressure Oil–Gas Turbine," Energies, MDPI, vol. 15(22), pages 1-21, November.
    7. Feichao Cai & Guanhong Huang & Xiaowei Liu, 2022. "Investigation of Shock Wave Oscillation Suppression by Overflow in the Supersonic Inlet," Energies, MDPI, vol. 15(11), pages 1-19, May.
    8. Riyadh Belamadi & Abdelhakim Settar & Khaled Chetehouna & Adrian Ilinca, 2022. "Numerical Modeling of Horizontal Axis Wind Turbine: Aerodynamic Performances Improvement Using an Efficient Passive Flow Control System," Energies, MDPI, vol. 15(13), pages 1-21, July.

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