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As water flows through the runner of a reaction turbine, pressure acting on it would vary from
- a)more than atmospheric pressure to vacuum
- b)less than atmospheric pressure to zero gauge pressure
- c)atmospheric pressure to more than atmospheric pressure
- d)atmospheric pressure to vacuum
Correct answer is option 'A'. Can you explain this answer?
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As water flows through the runner of a reaction turbine, pressure acti...
At inlet of reaction turbine water is admitted with high pressure head (above atmospheric pressure) with some kinetic energy. The pressure head of water gradually decreases from inlet to exit. Finally water leaves the runner with low pressure and small kinetic energy to tail race. Quite often, the pressure head of the water at turbine exit fall below the ambient pressure. A draft tube attached to the exit of the turbine, working like a diffuser converts the remaining kinetic energy of water discharged by the runner into the pressure energy so that water is discharged to the tail race with a positive pressure head to avoid cavitation.
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As water flows through the runner of a reaction turbine, pressure acti...
Pressure Variation in a Reaction Turbine Runner:
Pressure in a reaction turbine runner varies as water flows through it due to the conversion of kinetic energy into mechanical energy. Let's break down the pressure variation as the water flows through the runner:
More than Atmospheric Pressure to Vacuum:
- When the water enters the runner, it has a higher pressure than atmospheric pressure. This high-pressure water is used to rotate the turbine blades.
- As the water passes through the runner and imparts its energy to the turbine, the pressure drops below atmospheric pressure.
- The pressure continues to decrease as the water exits the runner, creating a vacuum behind the turbine blades.
Therefore, the correct answer is option 'A' - the pressure acting on the water in the runner of a reaction turbine varies from more than atmospheric pressure to vacuum. This pressure variation is essential for the efficient operation of the turbine and the generation of mechanical energy.
Pressure in a reaction turbine runner varies as water flows through it due to the conversion of kinetic energy into mechanical energy. Let's break down the pressure variation as the water flows through the runner:
More than Atmospheric Pressure to Vacuum:
- When the water enters the runner, it has a higher pressure than atmospheric pressure. This high-pressure water is used to rotate the turbine blades.
- As the water passes through the runner and imparts its energy to the turbine, the pressure drops below atmospheric pressure.
- The pressure continues to decrease as the water exits the runner, creating a vacuum behind the turbine blades.
Therefore, the correct answer is option 'A' - the pressure acting on the water in the runner of a reaction turbine varies from more than atmospheric pressure to vacuum. This pressure variation is essential for the efficient operation of the turbine and the generation of mechanical energy.
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As water flows through the runner of a reaction turbine, pressure acting on it would vary froma)more than atmospheric pressure to vacuumb)less than atmospheric pressure to zero gauge pressurec)atmospheric pressure to more than atmospheric pressured)atmospheric pressure to vacuumCorrect answer is option 'A'. Can you explain this answer?
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