Numerical investigation on radial impeller induced vortex rope in draft tube under partial load conditions
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Mechanical Science and Technology"
DOI: 10.1007/s12206-017-1217-7
Abstract: The vortex rope phenomena appearing in a draft tube under partial load operations were investigated. The efforts were carried out by using a homogeneous equilibrium vapor-liquid two-phase model and a blending SST turbulence model, and… read more here.
Keywords: radial impeller; vortex rope; partial load; tube partial ... See more keywords
A method of evaluating the vortex rope strength in draft tube of Francis turbine
Sign Up to like & getrecommendations! Published in 2020 at "Renewable Energy"
DOI: 10.1016/j.renene.2020.01.020
Abstract: Abstract A precessing vortex core in the draft tube of Francis turbine is considered as unstable flow conditions and the cause of many undesirable system instabilities for hydraulic power stations. The feature of vortex rope,… read more here.
Keywords: vortex rope; francis turbine; draft tube;
Identification on Vortex Rope in Francis Turbine Draft Tube Based on Convkurgram
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2022.3195252
Abstract: Francis turbine is a core energy conversion part and low-frequency vibrations caused by unsteady vortex rope in the draft tube may damage the unit through resonance. Therefore, a more comprehensive assessment and monitoring of the… read more here.
Keywords: vortex rope; frequency; francis turbine; draft tube ... See more keywords
Runner cone drilling and slotting to reduce vortex rope - induced pressure fluctuations in a Francis turbine
Sign Up to like & getrecommendations! Published in 2023 at "Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy"
DOI: 10.1177/09576509231178387
Abstract: Pressure fluctuations caused by helical vortex rope in the draft tube is one of the main reasons for the instability of Francis turbines. Previous studies showed that drilling holes on runner cone can reduce the… read more here.
Keywords: vortex rope; runner cone; pressure fluctuations;
Research on the Vortex Rope Control Techniques in Draft Tube of Francis Turbines
Sign Up to like & getrecommendations! Published in 2022 at "Energies"
DOI: 10.3390/en15249280
Abstract: Francis turbines are most widely used in hydropower due to their characteristics which include a fast response and wide time-scale operation. The vortex rope inside Francis turbines is a common flow phenomenon, which always causes… read more here.
Keywords: rope; francis turbines; vortex rope; vortex suppression ... See more keywords