Research output: Contribution to journal › Article › peer-review
Active Control of the Vortex Induced Pressure Fluctuations in a Hydro Turbine Model via Axial and Radial Jets at the Crown Tip. / Litvinov, Ivan; Suslov, Daniil; Tsoy, Mikhail et al.
In: International Journal of Fluid Machinery and Systems, Vol. 16, No. 4, 2023, p. 320-331.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Active Control of the Vortex Induced Pressure Fluctuations in a Hydro Turbine Model via Axial and Radial Jets at the Crown Tip
AU - Litvinov, Ivan
AU - Suslov, Daniil
AU - Tsoy, Mikhail
AU - Gorelikov, Evgeny
AU - Shtork, Sergey
AU - Alekseenko, Sergey
AU - Oberleithner, Kilian
N1 - This investigation is supported by the Russian Foundation for Basic Research (project no. 20-58-12012). The design and installation of the experimental setup was carried out partly within the framework of a state contract with IT SB RAS.
PY - 2023
Y1 - 2023
N2 - This paper presents an active method to control the pressure fluctuations induced by the rotating vortex rope (RVR) in a Francis hydro turbine model under part load conditions. The control method is based on the injection of axial or radial jets through a stagnant crown attached to the hydro turbine runner. A wide range of injection strategies are compared, and the effectiveness of suppressing pressure fluctuations is analyzed in terms of the spatial distribution of the jets and the flow rate required to suppress the oscillations. The experiments are performed on a fully automated aerodynamic test rig. The pressure fluctuations are quantified using data from the four acoustic sensors placed at a cross section in the cone of the hydro turbine draft tube. The best suppression of pressure fluctuations is achieved with a radial actuator. At a control flow rate of 2% of the main flow, the pressure fluctuations at the vortex rope frequency are reduced by 80% in terms of PSD compared to the baseline case without control. The presented control method will be useful for extending the operating range of Francis hydro turbines.
AB - This paper presents an active method to control the pressure fluctuations induced by the rotating vortex rope (RVR) in a Francis hydro turbine model under part load conditions. The control method is based on the injection of axial or radial jets through a stagnant crown attached to the hydro turbine runner. A wide range of injection strategies are compared, and the effectiveness of suppressing pressure fluctuations is analyzed in terms of the spatial distribution of the jets and the flow rate required to suppress the oscillations. The experiments are performed on a fully automated aerodynamic test rig. The pressure fluctuations are quantified using data from the four acoustic sensors placed at a cross section in the cone of the hydro turbine draft tube. The best suppression of pressure fluctuations is achieved with a radial actuator. At a control flow rate of 2% of the main flow, the pressure fluctuations at the vortex rope frequency are reduced by 80% in terms of PSD compared to the baseline case without control. The presented control method will be useful for extending the operating range of Francis hydro turbines.
KW - Francis hydro turbine
KW - active flow control
KW - jet injection
KW - rotating vortex rope (RVR)
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85164926264&origin=inward&txGid=b59b4be9b168acca1f32d31661d329cf
UR - https://www.mendeley.com/catalogue/cd9d36a2-d0cc-3cf1-af20-b220705f445a/
U2 - 10.5293/IJFMS.2023.16.3.320
DO - 10.5293/IJFMS.2023.16.3.320
M3 - Article
VL - 16
SP - 320
EP - 331
JO - International Journal of Fluid Machinery and Systems
JF - International Journal of Fluid Machinery and Systems
SN - 1882-9554
IS - 4
ER -
ID: 59453894