engineering recuitment AAI JE Technical Mock Test 2020-21 Internal Combustion Engine IC Engine Cycles Diesel Cycle
An air-standard Diesel cycle consists of the following processes:
1-2: Air is compressed isentropically.
2-3: Heat is added at constant pressure.
3-4: Air expands isentropically to the original volume.
4-1: Heat is rejected at constant volume.
If γ and T denotes the specific heat ratio and temperature, respectively the efficiency of the cycle is
1
\(1 - \frac{{{T_4} - {T_1}}}{{{T_3} - {T_2}}}\)
2
\(1 - \frac{{{T_4} - {T_1}}}{{\gamma \left( {{T_3} - {T_2}} \right)}}\)
3
\(1 - \frac{{\gamma \left( {{T_4} - {T_1}} \right)}}{{{T_3} - {T_2}}}\)
4
\(1 - \frac{{{T_4} - {T_1}}}{{\left( {\gamma - 1} \right)\left( {{T_3} - {T_2}} \right)}}\)