In a single stage impulse turbine, the velocity of steam approaching nozzles is negligible.
The ratio of the workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam is called
The velocity of steam, in reaction turbines, is increased in the fixed blades as well as in moving blades.
The ratio of the isentropic heat drop to the heat supplied, is called
The pressure of steam __________ while flowing through a nozzle.
When the nozzle operates with the maximum mass flow, the nozzle is said to be
De-Laval turbine is a
Curtis turbine is a
The diagram efficiency is the ratio of
The critical pressure ratio for gases is
When the cross-section of a nozzle first increases from its entrance to throat, and then decreases from its throat to exit, it is not a convergent-divergent nozzle.
The process of maintaining the speed of the turbine constant for various load conditions, is known as
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos2 α, where α is the nozzle exit flow angle, if the
The reheat factor depends upon
In order to reduce the rotor speed of an impulse turbine, the method employed is
The velocity of steam at throat of the nozzle is __________ the velocity of sound.
The critical pressure ratio for initially dry saturated steam is
The Rankine efficiency depends upon total useful heat drop and total isentropic heat drop.
The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.
The efficiency ratio is the ratio of total useful heat drop to the total isentropic heat drop.
Reheating of steam in a turbine
The ratio of the energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam is called mechanical efficiency.
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a
In an impulse turbine
The nozzle efficiency is the ratio of
The discharge through a nozzle is maximum for a certain value of exit pressure. This pressure is known as critical pressure.
Blading efficiency is also known as
The effect of supersaturation is that the
The purpose of governing in steam turbines is to