Energy conversion in a reaction turbine runner Assess the statement: As water flows over the vanes of a reaction turbine, its pressure head decreases and is converted into kinetic head before leaving the wheel. Choose the correct judgment.

Concept

• In a reaction turbine (e.g., Francis, Kaplan), pressure drop occurs across the runner itself.

Energy changesAs water passes through the moving passages, part of its pressure head converts to kinetic head and mechanical work on the runner.Residual velocity head at exit is then partially recovered by the draft tube.

Final AnswerTrue.