Question

Difference between air standard cycle and actual cycle

Answer 1

There are many difference between these two as following : Working fluid considered as air in air standard cycle but in actual there is always mixture of air and fuel. ... In actual cycle, there is a progressive combustion of mixture. But in ideal, combustion is taken as instaneous at constant volume in Otto cycle.

Answer 2

Answer:

There are many difference between these two as following :

Working fluid considered as air in air standard cycle but in actual there is always mixture of air and fuel.

Because of air is considered as constant there is heat capacity value like Cp & Cv are standard for air but it changes in actual cycle.

Also Cp & Cv change with temperature in actual but taken as constant in air standard cycle.

In air standard cycle we assume cylinder as insulated but in actual there is a heat transfer.

There is loss of work because of friction and because of leakage in actual but in air standard it's neglected.

In actual cycle, there is a progressive combustion of mixture. But in ideal, combustion is taken as instaneous at constant volume in Otto cycle.

Dissociation phenomena considered in actual cycle.

Time loss factor, heat loss factor, exhaust blow down, piping loss all are considered in the actual air cycle.

So, these are the major difference between air standard cycle and actual cycle.

Hope , this helps…!!!

Explanation: