The vertical vortex frequently occurs at hydraulic intakes such as diversion pipeline, diversion tunnel, spillway and pumping station.

When calculating water hammer force in derivation conduit with a surge chamber, the ordinary method usually thinks that the surge chamber can completely reflect the water hammer wave.

A finite element method for solving the flow field between bulb and conduit of bulb tubular turbine is given in this paper. It can be used for searching the optimal configuration of the bulb body.