Calculate diameter of runner, Mechanical Engineering

Assignment Help:

A radically inward flow turbine working under a head of 10 m and running at 250 rpm develops 185 KW at the turbine shaft. At inlet tip of the runner vane, the peripheral velocity of the wheel is 0.9.√2gH and radial velocity of flow is 0.3.√2.gH; when H is the effective head on the turbine,. If overall efficiency of turbine is 78% and hydraulic losses amount to 12% of total head, Calculate :-

(i) Diameter of runner and its width at inlet.

(ii) Guide blade angle at which water is directed to runner.

(iii) Inlet angle of the runner vane.

Consider that turbine is a reaction one with radial discharge at outlet. The following data pertains to an inward flow reaction turbine :

Net head = 60m; speed = 650rpm; break power = 275 KW;

Ratio of wheel width to wheel diameter at inlet = 0.10; Ratio of inner diameter to outer

diameter = 0.50; flow ratio (Kf) = 0.17; ηh = 0.95; ηo = 0.85.

The Flow velocity remains constant and discharge is radial. Neglect the area blockage by blades, work done that dimensions and blad angles of turbine.


Related Discussions:- Calculate diameter of runner

Heat loss in cylindruical pipe, Explain which laws of physics are used to d...

Explain which laws of physics are used to discuss heat loss in a pipe, and briefly explain how the famous equation for the loss of heat in a cylindrical pipe is derived. Explain th

Process selection and sequencing, Process Selection and Sequencing In th...

Process Selection and Sequencing In this, some factors, which have an influence in all processes, are discussed. The factors include size, shape complexity, tolerances and produ

Brazing vs welding, Brazing Vs Welding Following are the differences be...

Brazing Vs Welding Following are the differences between brazing and welding. (i)  In brazing, the joint surfaces are not raised to fusion point (or melted) and the joint is

What is squeeze time, Q. What is Squeeze time? It is the time between t...

Q. What is Squeeze time? It is the time between the initial application of the electrode pressure on the work and the initial application of current to make the weld. During th

Potential deadlock, Suppose an interesting situation represented in followi...

Suppose an interesting situation represented in following figure (b). The Petri net somewhat shows a paradoxical situation. Intuitively we contain in our minds that by raising the

What is wire-frame, What is Wire-frame Wire-frame models use the simpl...

What is Wire-frame Wire-frame models use the simplest data structures and they are ambiguous. Wire frame is a well-known example that consists of 16 vertices and 32 edges. We

What is pipe rack, Q. What is Pipe Rack? Separation between pipe racks ...

Q. What is Pipe Rack? Separation between pipe racks and process equipment provides access for operations, maintenance and to reduce involvement from adjacent fires. Process equ

Design ventilation systems for plant, Q. Design Ventilation Systems for pla...

Q. Design Ventilation Systems for plant? While some natural ventilation may sometimes be used, a pressurized HVAC (heating, ventilation and air-conditioning) system is more typ

Evaluting Properties, A piston-cylinder assembly fitted with a paddle wheel...

A piston-cylinder assembly fitted with a paddle wheel contains air, initially at p1=30 lbf/in2, T1=540 °F, and V1=4 ft3. The air undergoes a process to a final state where p2=20 lb

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