Question

What is the difference between the compression ratio and cut-off ratio?

Answer 1

`r=(V_1)/(V_2)`

`Cut\ off\ ratio \rho=(V_3)/(V_2)`

Step-by-step explanation:

Generally these terms are used in diesel engine .

From the diesel cycle

in process 1-2

Compression ratio

`r=(V_1)/(V_2)`

Now for process 2-3

`(T_3)/(T_2)=(V_3)/(V_2)`

`Cut\ off\ ratio \rho=(V_3)/(V_2)`

By using these ratio efficiency of Diesel engine can be given as

Efficiency of diesel engine

`\eta =1-(\rho ^(\gamma)-1)/(r^(\gamma -1)\gamma \left (\rho -1\right ))`