Maximum Thermal Efficiency of a Diesel Cycle

The Maximum Thermal Efficiency of a Diesel Cycle is the thermal efficiency of a combustion process of a reciprocating internal combustion engine. In it, fuel is ignited by heat generated during the compression of air in the combustion chamber, into which fuel is then injected. This is in contrast to igniting the fuel-air mixture with a spark plug as in the Otto cycle engine. Diesel engines are used in aircraft, automobiles, power generation, diesel-electric locomotives, and both surface ships and submarines.
The following formula is used to calculate the thermal efficiency: `n_(th)=1-1/r^(gamma-1)((alpha^gamma-1)/(gamma(alpha-1)))`, where:

• `r` = compression ratio
• `gamma` = ratio of specific heats
• `alpha` = cut-off ratio

References

Wikipedia(https://en.wikipedia.org/wiki/Diesel_cycle)