The air standard efficiency of a diesel cycle is expressed as-
1
\(\rm \eta = 1-\frac{1}{r^{\gamma -1}_k}\frac{1}{\gamma}\frac{r^{\gamma}_c-1}{r_c - 1}\)
2
\(\rm \eta = \frac{1}{\gamma }\frac{1}{r^{\gamma +1}_k}\frac{r^{\gamma}_c-1}{r_c - 1}\)
3
\(\rm \eta = \frac{1}{\gamma }\frac{1}{r^{\gamma -1}_k}\frac{r^{\gamma}_c+1}{r_c - 1}\)
4
\({\rm{\eta }} = \frac{1}{{\rm{\gamma }}}{\rm{.}}\frac{1}{{{\rm{r}}_{\rm{k}}^{\rm{\gamma }} + 1}}{\rm{.}}\frac{{{\rm{r}}_{\rm{c}}^{\rm{\gamma }} - 1}}{{{{\rm{r}}_{\rm{c}}} + 1}}\)
5
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