To maximize turbine efficiency the steam is expanded, doing work, in a number of stages.

Indeed, Tesla claimed a turbine efficiency of 95 percent, far higher than other turbines of the time.

One consideration with film cooling is that injecting the cooler bleed into the flow reduces turbine efficiency.

As with film cooling, increased cooling air decreases turbine efficiency, so that decrease has to be balanced with improved temperature performance.

The turbine efficiency of the gas Tesla turbine is estimated to be above 60, reaching a maximum of 95 percent.

Keep in mind that turbine efficiency is different from the cycle efficiency of the engine using the turbine.

Geometry is what limits the turbine efficiency to 59.3%.

Also, the mechanism can be deliberately modified to reduce the turbine efficiency in a predefined position.

The turbine pressure ratio is a function of and the turbine efficiency.

Implementation of optimization options derived from the tests resulted in an improvement of turbine efficiency to 92%.