In a Francis turbine, the runner blades are radial at the inlet and the discharge leaves the runner radially at the exit. For this turbine

The relative velocity is radial at the outlet

The absolute velocity is radial at the outlet

The guide vane angle is 90 degrees

The velocity of flow is constant

Francis turbine is the bulk flow is in the radial direction.
To be more clear, the flow is tangential and radial at the inlet but is entirely radial with a negligible tangential component at the outlet.
The flow, under the situation, has to make a 90 degree turn after passing through the rotor for its inlet to the draft tube.
Thus the absolute velocity is radial at the outlet.

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