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Numerical investigation of the vortex core precession in a model hydro turbine with the aid of hybrid methods for computation of turbulent flows

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Thermophysics and Aeromechanics Aims and scope

Abstract

Numerical modeling of the unsteady flow in the draft tube of the test bench hydro turbine is conducted. The hybrid RANS-LES methods for modeling turbulent flows are compared. The intensity and frequency of pressure fluctuations, which are induced by the vortex core precession under the runner, and the integral characteristics are considered. An analysis of the synchronous and asynchronous parts of pressure fluctuations is done; the generating and influence of the synchronous component of fluctuations are considered. The vortex core interaction with the draft tube elbow is considered.

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Authors and Affiliations

  1. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia

    A. V. Sentyabov

  2. Siberian Federal University, Krasnoyarsk, Russia

    A. A. Gavrilov & A. A. Dekterev

  3. Novosibirsk State University, Novosibirsk, Russia

    A. V. Sentyabov, A. A. Gavrilov, A. A. Dekterev & A. V. Minakov

Authors
  1. A. V. Sentyabov
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  2. A. A. Gavrilov
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  3. A. A. Dekterev
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  4. A. V. Minakov
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Corresponding author

Correspondence to A. V. Sentyabov.

Additional information

The work was financially supported by the Russian Foundation for Basic Research (Grants Nos. 13-08-98115, 14-08-31586), the RF Government for state support of scientific research conducted under the guidance of leading scientists in Russian higher schools (the leading scientist K. Hanjalic, Novosibirsk State University) (Grant No. 11.G34.31.0046).

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Sentyabov, A.V., Gavrilov, A.A., Dekterev, A.A. et al. Numerical investigation of the vortex core precession in a model hydro turbine with the aid of hybrid methods for computation of turbulent flows. Thermophys. Aeromech. 21, 707–718 (2014). https://doi.org/10.1134/S0869864314060055

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  • DOI: https://doi.org/10.1134/S0869864314060055

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