Determine the maximum efficiency, Mechanical Engineering

Assignment Help:

A jet strikes tangentially a smooth curved vane moving in the similar direction as the jet, and the jet gets reversed in the direction. Prove that the maximum efficiency is slightly less than 60 percent. The following data relate to a Pelton wheel:

Head = 72 m,

speed of wheel = 240 r.p.m.,

speed , ratio = 0.45,

coefficient of velocity = 0.98,

shaft power of the wheel = 115 kW,

overall efficiency = 85%,

Design the Pelton wheel.


Related Discussions:- Determine the maximum efficiency

Define universal portable radial drills, Define universal portable radial d...

Define universal portable radial drills Drilling machine is mounted on a trolley base to have a greater degree of mobility. In order to move the machine to any position on or a

Find the tension in the thread, Find the tension in the thread: A thre...

Find the tension in the thread: A thread is wound round a heavy homogeneous cylinder of mass m and radius. The cylinder is permitted to fall from rest and unwinds the thread.

Shear forces and bending moments, Shear Forces and Bending Moments: ...

Shear Forces and Bending Moments: A beam is a structural member, subjected to a system of external forces (involving inclined load) to generate the bending of the member in

Theory of machine, In turning moment diagram. why we start to draw curve fr...

In turning moment diagram. why we start to draw curve from o degree?

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

Petrol-general safety tips , Petrol: Work in a well-ventilated area. Keep ...

Petrol: Work in a well-ventilated area. Keep flames or sparks away from the work area or where petrol is stored.

Repair of surface defects in welds, Repair of surface defects in welds by c...

Repair of surface defects in welds by chipping, grinding and gouging is permitted provided the thickness is not reduced below the minimum required. Removal of defects shall be ver

Compression ignition engines - thermodynamics, Compressio n Ignition Engin...

Compressio n Ignition Engines (or C.I. Engine): It works on the basis of dieses cycle. In diesel engines, energy addition occurs at constant pressure but energy rejection at

Determine lift coefficient, A thin spanwise symmetrical wing has an aspect ...

A thin spanwise symmetrical wing has an aspect ratio of 10 and a straight edges with  taper ratio (tip chord / root chord) of 0.8 and root chord of 1 m. This wing does not have geo

Powder metallurgy, why pre sintering needed in powder metallurgy

why pre sintering needed in powder metallurgy

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