Question 594Steam Plants - Assistant Engineer70% to pass
What happens to the steam as it moves across the moving blades in a reaction turbine?
AI Explanation
The correct answer is A) It creates an axial thrust in the direction of the steam flow.
In a reaction turbine, as the steam moves across the moving blades, it imparts momentum to the blades, causing them to rotate. This transfer of momentum from the steam to the blades results in an axial thrust force in the direction of the steam flow, which is the driving force that makes the turbine rotor spin.
The other options are incorrect because:
B) The steam loses velocity as it passes through the turbine, not at constant pressure.
C) The steam gains velocity as it passes through the nozzles, but loses velocity as it crosses the moving blades.
D) The axial thrust is in the direction of the steam flow, not opposing it.
Related Questions
#592 In what classification of steam turbines are the moving blades and the adjacent fixed rows of blades shaped to act as nozzles? #593 Why do double flow reaction turbines produce very little axial thrust? #595 In which type of turbine does a pressure drop exist through the fixed blades and the moving blades? #596 What is used to compensate for the increased possibility of blade vibration occurring with impulse turbine blading? #597 An energy loss associated with a reaction turbine, but not an impulse turbine, is _______________.