- #1

- 82

- 0

## Main Question or Discussion Point

definition wise i got the difference between these two efficiencies.

but in practice how does these two differ?

i was refering to this book:

Jet propulsion: a simple guide to the aerodynamics and thermodynamic design ... By N. A. Cumpsty

he has mentioned this:

"using polytropic efficiency makes algebra easier, but it also removes a bias in the isentropic efficiency when comparing machines of different pressure ratios"

can anyone please explain me in a much better way how these two efficiencies work in real practice and how they are different coz still m totally confused?

but in practice how does these two differ?

i was refering to this book:

Jet propulsion: a simple guide to the aerodynamics and thermodynamic design ... By N. A. Cumpsty

he has mentioned this:

"using polytropic efficiency makes algebra easier, but it also removes a bias in the isentropic efficiency when comparing machines of different pressure ratios"

can anyone please explain me in a much better way how these two efficiencies work in real practice and how they are different coz still m totally confused?