Results 211 to 220 of about 10,024 (247)

Effect of organic solvents on earwax cortisol extraction in Hanwoo cattle. [PDF]

J Anim Sci Technol
Ataallahi M, Park GW, Park KH.
europepmc   +1 more source

Efficacy of injectable versus topical formulation of ivermectin against Anopheles stephensi mosquitoes feeding on different body locations of treated Holstein calves. [PDF]

Parasit Vectors
Dreyer SM, Molden T, Bauer ML, Pfaff C, Smith DJ, Vaughan JA.   +5 more
europepmc   +1 more source

Ultrasonic-Assisted Extraction of Polysaccharides from <i>Schizochytrium limacinum</i> Meal Using Eutectic Solvents: Structural Characterization and Antioxidant Activity. [PDF]

Foods
Li X, Wang J, Huang G, Jia Z, Xu M, Chen W.   +5 more
europepmc   +1 more source

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A method of evaluating the vortex rope strength in draft tube of Francis turbine

Renewable Energy, 2020
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, pressure fluctuations and runner outlet velocity at part-load conditions are investigated experimentally and numerically in ...
Lingjiu Zhou, Quanwei Liang, Wenzhe Kang   +2 more
exaly   +2 more sources

Study of vortex rope based on flow energy dissipation and vortex identification

Renewable Energy, 2022
Ruofu Xiao
exaly   +2 more sources

Study of vortex rope for the flow field pulsation law

Ocean Engineering, 2023
Faye Jin, Ruofu Xiao, Di Zhu
exaly   +2 more sources

Computational analysis of vortex rope in a hydroturbine of Tucuruí dam

Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2020
There is a relevant hydraulic potential in Amazon rivers, from which it is generated most of the energy available for the largest part of Brazil. One of the most important hydropower plants in the Amazon is Tucurui dam, which can produce 8370 MW through Francis turbines.
Giordane J. Antunes Junior, Adry K. F. Lima, Jerson R. P. Vaz, Erb F. Lins   +3 more
openaire   +1 more source

Numerical Simulation of the Rotating Vortex Rope with Code_Saturne

2019 International Conference on ENERGY and ENVIRONMENT (CIEM), 2019
The paper presents numerical simulations of the rotating vortex rope (RVR) inside a Francis turbine draft tube. The computational fluid dynamics (CFD) calculations were carried out using the Code_Saturne software. The geometry of the turbine was obtained from the Francis-99 workshops. The mesh files provided for the Francis-99 workshop II were modified
Robert Mitrut, Diana Maria Bucur, Georgiana Dunca, Michel J. Cervantes   +3 more
openaire   +1 more source

Experimental Investigation Of Couple Precessing Vortex Ropes In A Hydraulic Vortex

Siberian Journal of Physics, 2016
The work is devoted to the experimental study of the interaction of the precessing vortex pair in the hydrodynamic vortex chamber. Swirling flow was created by a 12 tangentially directed rectangular nozzles. Design swirl number was varied in the range 0÷6.6 based on the geometry of the swirl device.
Sergey Skripkin, Sergey Dremov, Sergey Shtork, Ivan Kabardin   +3 more
openaire   +1 more source

Part Load Vortex Rope as a Global Unstable Mode

Journal of Fluids Engineering, 2017
Renewable energy sources (RES) have reached 23.7% of the worldwide electrical generation production in 2015. The hydraulic energy contribution amounts to 16.6% and comes mainly form large-scale hydropower plants, where Francis turbines represents 60% of the generating units. However, the future massive development of RES will require more advanced grid
Pasche, Simon, Avellan, François, Gallaire, François   +2 more
openaire   +2 more sources