Compression ratio and mean effective pressure, Mechanical Engineering

Assignment Help:

Compression Ratio:

It is calculated as shown below

2309_Compression Ratio and Mean Effective Pressure.png

Mean Effective Pressure (Pm  or Pmef):

Mean effective pressure is the hypothetical constant pressure that is assumed to be acting on the piston during its expansion stroke producing the same work output as from the actual cycle.

We can say that

2092_Compression Ratio and Mean Effective Pressure1.png

The constant depends on mechanism used to get the indicator diagram and has units bar/m.


Related Discussions:- Compression ratio and mean effective pressure

Thermodaynamic, Ask question #MiThe steam that leaves the super-heater is e...

Ask question #MiThe steam that leaves the super-heater is expanded from 130bar at 535°C to 25.2bar at 310°C in a high pressure turbine. The steam from the exit of the HP turbine is

Fundamental geometric transformation, Fundamental geometric transformation:...

Fundamental geometric transformation: The fundamental geometric transformation is Rotation, Translations and Scaling. Other transformations involve reflection and shearing. Tr

Compute position and magnitude of the resultant force, Compute the position...

Compute the position and magnitude of the resultant force acting on the framework shown below. What is the moment of the force system ?

Determine elongation of bar, Determine elongation of bar: A conical b...

Determine elongation of bar: A conical bar tapers uniformly from diameter of 4 cm to 1.5 cm in length of 40 cm. If axial force of 80 kN is applied at each end, determine elon

Forces, what are the practical applications and use of finding uniform dist...

what are the practical applications and use of finding uniform distributed load, concentrated point load, inclined point load, roller supported beam.

High carbon tool steels, High Carbon Tool Steels Tools are implements...

High Carbon Tool Steels Tools are implements such are employed to shape, cut or deform other materials. They are largely made in steel, although other alloys have also been i

Diploma.., Explain the point of contraflexure?

Explain the point of contraflexure?

Gear torque output, what is the different torque rating of a helical gear o...

what is the different torque rating of a helical gear one direction verses the other

Evaluate the specific enthalpy - thermodynamics, Evaluate the specific enth...

Evaluate the specific enthalpy - thermodynamics: Steam is being generated in a boiler at a pressure of 15.25 bar. Calculate the specific enthalpy when ( i )  Steam i

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