Impulse turbine, Mechanical Engineering

Assignment Help:

IMPULSE TURBINE:

The steam turbine in which the steam expands while passing through nozzle and remains at the constant pressure over the blades is called as impulse turbine. In the given figure single stage impulse turbine is shown. In this kind of turbine there is one set of fixed nozzles which is followed by the one ring of moving blades. The blades are attached to the rim of wheel, which is keyed to the shaft. The steam expands from its initial pressure to the final pressure in only one set of nozzle. The jet of steam with a very high velocity enters the moving blades. The jet of steam gets deflected when passing over these blades, exerts force on them and in this way the rotor starts rotating.

De-laval, Curtis, Zoelly, Rateau are the examples of this type of turbine. Delaval turbine is impulse turbine which is suitable for low pressure steam supply. But the only disadvantage of this type of turbine is its very high speed (usually 30000rpm) so its use is limited. It is as shown in figure. The steam is expanded from boiler pressure to condenser pressure in a single stage only; its velocity will be very high. But this speed is too high for practical applications.

 

 


Related Discussions:- Impulse turbine

Thermodynamics, can u please explain me d concept of 2nd law of thermodynam...

can u please explain me d concept of 2nd law of thermodynamics. I am not so sure about it ??

Limitations of gas tungsten arc welding (gtaw), LIMITATIONS OF GAS TUNGSTEN...

LIMITATIONS OF GAS TUNGSTEN ARC WELDING (GTAW) It Produces lower deposition rates than consumable electrode arc welding processes. It Requires slightly more skill as comp

Expression for condition of maximum discharge, Drive an mathmatical express...

Drive an mathmatical expression for condition of maximum discharge through the chimney. Dry saturated steam is supplied from a boiler to a steam engine at a pressure of 15 bar.

MOTORSPORT VEHICLE CONSTRUCTION, MODIFICATIONS REQUIRE FOR A ROAD CAR TO EN...

MODIFICATIONS REQUIRE FOR A ROAD CAR TO ENTER A HILL CLIMB

Determine the resultant of force system, Q: Determine the resultant of forc...

Q: Determine the resultant of force system which is acting tangential to the circle of radius 1m as shown in the figure given below. Also find the direction of it and line of actio

Determine the maximum bending moment, Determine the maximum bending moment:...

Determine the maximum bending moment: A 12 m span simply supported beam is carrying a consistently distributed load of 2 kN/m over a length of 6 m from the left end and point

Can you explain the mobile bed model, Q. Can you explain the Mobile bed mod...

Q. Can you explain the Mobile bed model? Mobile bed models can again be either geometrically similar or vertically exaggerated. Models of the former type permit study of proble

Explain the cushion materials which used in moulding sand, Q. Explain the C...

Q. Explain the Cushion Materials which used in moulding sand? These materials when added to the moulding sand burn and from gases when the molten metal is poured into the mould

High speed circuit-carburettor in high speed condition , High Speed Circuit...

High Speed Circuit : The speed of motorcycle is further increased by raising the throttle valve. In this condition, fuel and air enter through main passage and main jet as can be

Determine the maximum uniformly distributed load, Determine the maximum uni...

Determine the maximum uniformly distributed load: A timber beam 150 mm wide & 300 mm deep is supported simply over a span of 4 m. determine the maximum uniformly distribute

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd