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This invention relates to a mixed flow turbine with eddy confinement device, characterized in that it sets an eddy confinement device applying axial-flow foliated structure between draft-tube and… (More)
For Francis hydraulic turbines, unsteady flow caused by vortex ropes in the draft tube leads to a problem of stability in operation. The unsteady flow field ef a model Francis hydraulic turbine was… (More)
A flow-mixed turbine features that a flow guiding blade which has the length equal to that of the blade on rotary wheel and the maximal thickness equal to the 2/3-1/2 of that of the blade on rotary… (More)
The invention discloses a weather-proof concrete surface wear-resisting agent comprising oxalic acids and styrene-acrylate emulsions, wherein the proportion of the oxalic acids to the… (More)
Interblade vortices can greatly influence the stable operations of Francis turbines. As visible interblade vortices are essentially cavitating flows, i.e., the ones to cause interblade vortex… (More)
The invention relates to a hydrodynamic float vane type microminiature pump, in particular to a vane type microminiature pump with no external mechanical axis, no leakage or with fluid in no contact… (More)