scholarly journals Prediction of vortex precession in the draft tube of a model hydro turbine using mean field stability theory and stochastic modelling

2021 ◽  
Vol 774 (1) ◽  
pp. 012003
Author(s):  
Jens S. Müller ◽  
Moritz Sieber ◽  
Ivan Litvinov ◽  
Sergey Shtork ◽  
Sergey Alekseenko ◽  
...  
Keyword(s):  
Stability Theory ◽  
Draft Tube ◽  
Mean Field ◽  
Stochastic Modelling ◽  
Hydro Turbine ◽  
Vortex Precession

Investigations Of Pressure Pulsations In A Model Of Draft Tube Of Hydraulic Turbine Caused By Vortex Rings

2016 ◽  
Vol 11 (4) ◽  
pp. 25-32
Author(s):  
Sergey Skripkin ◽  
Mikhail Tsoy ◽  
Sergey Shtork ◽  
Pavel Kuibin
Keyword(s):  
Vortex Ring ◽  
High Speed ◽  
Draft Tube ◽  
Hydraulic Turbine ◽  
Vortex Rings ◽  
Experimental Investigations ◽  
Visualization Technique ◽  
Vortex Rope ◽  
Hydro Turbine ◽  
Hydraulic Turbines

Current work is devoted to experimental investigations of behavior of precessing vortex rope in a draft tube model of hydraulic turbine. We used combination of stationary and freely rotating swirlers as a hydro turbine model. Such construction provides velocity distribution on the draft tube inlet close to distribution in natural hydraulic turbines operated at non-optimal conditions. The phenomenon of precessing vortex rope reconnection with further formation of vortex ring was founded in this experimental research using high-speed visualization technique. Synchronization of highspeed visualization and pressure measurements allowed us to relate pressure shock on the draft tube wall with vortex ring moving along wall.

Unsteady regimes and pressure pulsations in draft tube of a model hydro turbine in a range of off-design conditions

2018 ◽  
Vol 91 ◽  
pp. 410-422 ◽  
Author(s):  
Ivan Litvinov ◽  
Sergey Shtork ◽  
Evgeny Gorelikov ◽  
Andrey Mitryakov ◽  
Kemal Hanjalic
Keyword(s):  
Draft Tube ◽  
Pressure Pulsations ◽  
Hydro Turbine ◽  
Unsteady Regimes

scholarly journals Laboratory modeling of flow regimes in a draft tube of Francis hydro-turbine

2017 ◽  
Vol 143 ◽  
pp. 02103 ◽  
Author(s):  
Sergey Shtork ◽  
Ivan Litvinov ◽  
Andrey Mitryakov ◽  
Kemal Hanjalic
Keyword(s):  
Draft Tube ◽  
Flow Regimes ◽  
Laboratory Modeling ◽  
Hydro Turbine

scholarly journals Improvement of hydro-turbine draft tube efficiency using vortex generator

2015 ◽  
Vol 7 (7) ◽  
pp. 168781401559533 ◽  
Author(s):  
Xiaoqing Tian ◽  
Huachen Pan ◽  
Shuli Hong ◽  
Yuan Zheng
Keyword(s):  
Draft Tube ◽  
Vortex Generator ◽  
Hydro Turbine

Study on swirl flow in a draft tube of a bulb hydro turbine model

2018 ◽  
Vol 42 (10) ◽  
pp. 812-817
Author(s):  
Viet Luyen Vu ◽  
Zhenmu Chen ◽  
Young-Do Choi
Keyword(s):  
Draft Tube ◽  
Swirl Flow ◽  
Hydro Turbine ◽  
Turbine Model
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