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Numerical simulation of unsteady flows through a radial turbine

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Abstract

The article deals with the numerical simulation of unsteady flows through the turbine part of the turbocharger. The main focus of the article is the extension of the in-house CFD finite volume solver for the case of unsteady flows in radial turbines and the coupling to an external zero-dimensional model of the inlet and outlet parts. In the second part, brief description of a simplified one-dimensional model of the turbine is given. The final part presents a comparison of the results of numerical simulations using both the 3D CFD method and the 1D simplified model with the experimental data. The comparison shows that the properly calibrated 1D model gives accurate predictions of mass flow rate and turbine performance at much less computational time than the full 3D CFD method. On the other hand, the more expensive 3D CFD method does not need any specific calibration and allows detailed inspections of the flow fields.

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Acknowledgements

Access to computing and storage facilities owned by parties and projects contributing to the National Grid Infrastructure MetaCentrum provided under the programme “Projects of Large Research, Development, and Innovations Infrastructures” (CESNET LM2015042) is greatly appreciated.

Funding

The authors acknowledge support from the EU Operational Programme Research, Development and Education, and from the Center of Advanced Aerospace Technology (CZ.02.1.01/0.0/0.0/16_019/0000826), Faculty of Mechanical Engineering, Czech Technical University in Prague.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Czech Technical University in Prague, Karlovo nám. 13, 121 35 Praha 2, Prague, Czech Republic

    Jiří Fürst

  2. Faculty of Mechanical Engineering, Czech Technical University in Prague, Přílepská 1920, 252 63, Roztoky, Czech Republic

    Zdeněk Žák

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  1. Jiří Fürst
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  2. Zdeněk Žák
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Correspondence to Jiří Fürst.

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Communicated by: Pavel Solin

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Fürst, J., Žák, Z. Numerical simulation of unsteady flows through a radial turbine. Adv Comput Math 45, 1939–1952 (2019). https://doi.org/10.1007/s10444-019-09670-4

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