Mitigation of flow-induced pressure fluctuations in a Francis turbine operating at the design and partial load regimes—LES simulations
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Heat and Fluid Flow"
DOI: 10.1016/j.ijheatfluidflow.2019.108444
Abstract: Abstract High-fidelity large eddy simulations (LES) were conducted to characterize the spatial and temporal structure of turbulent flows in an industrial-sized Francis turbine while the unit operated at the design point and partial load. A… read more here.
Keywords: load; partial load; francis turbine; design ... See more keywords
Active control of variable geometry Francis Turbine
Sign Up to like & getrecommendations! Published in 2020 at "Renewable Energy"
DOI: 10.1016/j.renene.2019.05.125
Abstract: Abstract The governor is an important component of a hydro power plant. It actuates the guide vanes that regulate the water input to the turbine that controls the turbine power and speed. Laboratory studies have… read more here.
Keywords: turbine; geometry; active control; model ... 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;
Investigation of steady and unsteady cavitating flows through a small Francis turbine
Sign Up to like & getrecommendations! Published in 2021 at "Renewable Energy"
DOI: 10.1016/j.renene.2021.03.080
Abstract: Abstract Evaluation of cavitation characteristics is one of the most significant tasks whilst properly designing a water turbine. This work investigates the steady-state and transient cavitating flows through a small Francis turbine, based on the… read more here.
Keywords: flows small; small francis; load; francis turbine ... See more keywords
Experimental Investigation of a Francis Turbine during Exigent Ramping and Transition into Total Load Rejection
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Hydraulic Engineering"
DOI: 10.1061/(asce)hy.1943-7900.0001471
Abstract: AbstractThis study investigates the unsteady pressure fluctuations in a hydraulic turbine observed during a dangerous case of steep ramping interrupted by an unexpected transition into total load r... read more here.
Keywords: experimental investigation; total load; investigation francis; transition total ... See more keywords
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
A Novel Multidimensional Frequency Band Energy Ratio Analysis Method for the Pressure Fluctuation of Francis Turbine
Sign Up to like & getrecommendations! Published in 2018 at "Mathematical Problems in Engineering"
DOI: 10.1155/2018/3494785
Abstract: The pressure fluctuation has multiple influence on the steady operation of Francis turbine, and the impact degree varies with the operation condition. In this paper, for the analysis of pressure fluctuation in the Francis turbine,… read more here.
Keywords: frequency; pressure fluctuation; francis turbine; energy ratio ... See more keywords
Characteristic analysis of the efficiency hill chart of Francis turbine for different water heads
Sign Up to like & getrecommendations! Published in 2017 at "Advances in Mechanical Engineering"
DOI: 10.1177/1687814017690071
Abstract: According to several model test results of Francis turbines, complete model efficiency hill charts were constructed. The formation and inevitability of diversified hydraulic phenomena on model efficiency hill chart for typical head range were analyzed… read more here.
Keywords: head; hill chart; efficiency hill; francis turbine ... See more keywords