Comparison of air standard cycle and fuel air cycles

In this article reasons for the difference between air-standard cycles and fuel-air cycles is discussed. 

The magnitude of difference between the two cycles can be attributed to the following factors :

• The character of the cycle ( Due to assumptions ) 
• Equivalence ratio ( Actual F/A / Stoichiometric F/A )
• Chemical composition of the fuel

Air standard cycles differ in many aspects following below :

1. The variation of specific heat with temperature
2. The change in pressure temperature
3. Change of specific heat with temperature
4. The working substance is a mixture of air and fuel vapour