In a Rateau turbine, what happens to pressure and velocity through the nozzle?

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Multiple Choice

In a Rateau turbine, what happens to pressure and velocity through the nozzle?

Through a Rateau nozzle, the steam is accelerated by a converging passage. Because mass flow is constant, the flow speeds up as the cross-sectional area decreases. In an adiabatic nozzle the total enthalpy stays essentially the same, so the increase in kinetic energy comes at the expense of static pressure. Put simply, the nozzle converts pressure energy into velocity: the static pressure falls while the velocity rises, producing a high-speed jet to drive the turbine.

Through a Rateau nozzle, the steam is accelerated by a converging passage. Because mass flow is constant, the flow speeds up as the cross-sectional area decreases. In an adiabatic nozzle the total enthalpy stays essentially the same, so the increase in kinetic energy comes at the expense of static pressure. Put simply, the nozzle converts pressure energy into velocity: the static pressure falls while the velocity rises, producing a high-speed jet to drive the turbine.

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