isentropic

It is sometimes also known as the isentropic expansion factor.

Sometimes it is more convenient to use an isentropic velocity ratio.

Next, a great deal can be computed for isentropic processes of an ideal gas.

The expansion process is isentropic and hence involves no heat interaction.

To measure how well a turbine is performing we can look at its isentropic efficiency.

Again with the continuity law, but now for isentropic flow gives:

Process 1 to 2 is isentropic compression of the fluid (blue colour)

Since the process is isentropic, the stagnation properties remain constant across the fan.

In words: at absolute zero all isothermal processes are isentropic.

For a reversible process, this is identical to an isentropic process.

It remains very close to the saturated vapor state after an hypothetical isentropic expansion.

In practice this process is not isentropic as energy is once again lost to friction and turbulence.

The thermodynamic efficiency is a measure of how well it performs compared to an isentropic case.

The efficiency of the expander is defined by comparison with an isentropic expansion.

It is caused mainly from isentropic heating of the air molecules within the compression wave.

It can be determined for an isentropic process that the second law of thermodynamics results in the following:

In an ideal system, this is isentropic.

Since the flow turns in small angles and the changes across each expansion wave are small, the whole process is isentropic.

Process 3-4 is an isentropic expansion (power stroke).

An isentropic process occurs at a constant entropy.

The blade-to-gas speed ratio can be expressed in terms of the isentropic stage terminal velocity c.

Process 3 to 4 is isentropic expansion (yellow)

In isentropic flow the ratio of total pressure to static pressure is given by:

Point 3 labels the end of the nozzle where the flow transitions from isentropic to Fanno.

It can be proven that any reversible adiabatic process is an isentropic process.