According to the dynamic energy distribution,helical vortex rope breathes due to the energy propagation of runner outflow,and flow interference between runner outflow and draft tube inflow were clarified.

Researches on characteristics of swell and shrinking active zone of expansive soil and failure mechanism of landslides;

Research on the Influence Factors and Model Test Method of Vortex Pressure Fluctuation;

Researches have revealed that the vortex in the draft tube is the principal reason to unit vibration.

Numerical simulation of three-dimensional unsteady vortex rope turbulent flow occurred to the draft tube of a Francis turbine

This paper numerically simulated the flow in draft tube of the Three Gorge′s prototype using non-steady RNS turbulence model and detailed analyzed the law of motion of the vortex rope as well as the frequency and phase characteristics of the water pressure pulsation produced yet it.

The flow in a hydraulic turbine including the guide vane, the turbine and the draft tube was analyzed by solving the three-dimensional, unsteady Reynolds-averaged Navier-Stokes (RANS) equations with the RNG k-ε turbulence model to investigate the pressure fluctuations due to the vortex rope at partial loads.