The velocity of steam leaving the nozzle of a single-stage impulse turbine is 813 m/sec. The...

The velocity of steam leaving the nozzle of a single-stage impulse turbine is 813 m/sec. The nozzle angle is 20° and the blade speed corresponds to maximum blade efficiency. The moving blade is symmetric, assumed to be frictionless, and there is neither expansion nor contraction of the steam flow through the blade passage. Draw the velocity diagram and determine the relative velocity of steam leaving the blade.

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samet mamat answered 1 year ago

Steam enters the nozzle of an impulse turbine stage at 60 bar and 500 °C and...

Steam enters the nozzle of an impulse turbine stage at 60 bar and 500 °C and leaves at 20 bar. Flow is adiabatic and reversible. The nozzle angle is 20°. The moving blade is symmetric, travels at optimum velocity, and assumed to be frictionless. It is also assumed that there is neither expansion nor contraction of the steam flow through the blade passage. Draw the velocity diagram and calculate (a) the blade efficiency and (b) the stage efficiency.

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1- Steam enters a nozzle at 500 °C and 1000 kPa with a velocity of 15...

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