title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ ÑÐ°ÑÑÐ¾Ð³Ð»Ð°ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ³Ð»Ð¾Ð² ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð»Ð¾Ð¿Ð°ÑÑÐµÐ¹ Ð² ÑÐ°Ð±Ð¾ÑÐµÐ¼ ÐºÐ¾Ð»ÐµÑÐµ Ð½Ð° Ð¿ÑÐ»ÑÑÐ°ÑÐ¸Ð¸ Ð´Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ð² Ð¿ÑÐ¾ÑÐ¾ÑÐ½Ð¾Ð¼ ÑÑÐ°ÐºÑÐµ Ð³Ð¸Ð´ÑÐ¾ÑÑÑÐ±Ð¸Ð½Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Study of influence of misalignment of the runner blades of a Kaplan turbine on pressure fluctuations
Creators: name: ÐÐ¾ÑÐ¾Ð², ÐÐ¸ÐºÐ¸ÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: Ð¿Ð¾Ð²Ð¾ÑÐ¾ÑÐ½Ð¾-Ð»Ð¾Ð¿Ð°ÑÑÐ½Ð°Ñ Ð³Ð¸Ð´ÑÐ¾ÑÑÑÐ±Ð¸Ð½Ð°
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Ð¼Ð¾Ð´ÐµÐ»Ñ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ SST k-Ï
kaplan turbine
pressure fluctuations
runner blade misalignment
CFD analysis
SST k-Ï turbulence model
k-e turbulence model

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description: The present paper studies the influence of misalignment of the runner blades of a Kaplan turbine on pressure fluctuations. The pressure fluctuations are measured at guide vanes, runner blades and draft tube cone. The commercial CFD code ANSYS CFX was used for modeling the flow path in turbine. For the purpose of us-ing the code a computational grid was computed, respectively to guide vane over-hanging and front and rear runner blade clearance. A steady CFD analysis was per-formed using various turbulence models and a section of the propeller characteristic of the turbine was constructed. After validation experimental data with calculated ones, a most suited turbulence model was identified for this kind of research. An un-steady calculation of three cases of runner blade positioning was performed: matched blades, misaligned blades within tolerance, misaligned blades out of tolerance. The obtained signals were transformed into spectra using the fast Fourier transform. The obtained spectra are compared for all three cases of blade positioning.