In an impulse turbine nozzle, the rotor experiences energy transfer primarily through which mechanism?

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Multiple Choice

In an impulse turbine nozzle, the rotor experiences energy transfer primarily through which mechanism?

In an impulse nozzle, the key idea is that the steam’s thermal energy (enthalpy) is converted into kinetic energy as the flow is expanded and accelerated to a high speed. That high-velocity jet then transfers energy to the rotor mainly through its momentum when it strikes the blades, doing work on the shaft. So the primary mechanism is converting thermal energy into kinetic energy in the nozzle, with energy transfer to the rotor occurring via the jet’s kinetic energy. The nozzle does not increase pressure to transfer energy, nor is the main effect a change in mass flow.

In an impulse nozzle, the key idea is that the steam’s thermal energy (enthalpy) is converted into kinetic energy as the flow is expanded and accelerated to a high speed. That high-velocity jet then transfers energy to the rotor mainly through its momentum when it strikes the blades, doing work on the shaft. So the primary mechanism is converting thermal energy into kinetic energy in the nozzle, with energy transfer to the rotor occurring via the jet’s kinetic energy. The nozzle does not increase pressure to transfer energy, nor is the main effect a change in mass flow.

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