Mechanical Engineering :: Steam Nozzles and Turbines
- In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be
- A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called
- A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called
- The temperature of flue gases at air heater outlet should be
- The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.
- In a reaction turbine
- The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
- The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.
- In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is
- Expanding steam to a very low pressure (high vacuum) in steam engines is
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A.
The steam is allowed to expand in the nozzle, where it gives a high velocity before it enters the moving blades |
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B.
The expansion of steam takes place partly in the fixed blades and partly in the moving blades |
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C.
The steam is expanded from a high pressure to a condenser pressure in one or more nozzles |
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D.
The pressure and temperature of steam remains constant |