Losses occurring in the gas turbine
In a non-ideal world, losses occur at several places in the gas turbine. There are also several types of losses.
It is assumed that no pressure losses occurred. This is, of course, not true. Pressure losses occur at several places. First of all, in the combustor. The combustion chamber pressure loss is given by
The combustor pressure loss factor is now defined as
Pressure losses also occur at the inlet and at the exhaust duct. For industrial gas turbines, these pressure losses are defined as
Losses also occur due to internal friction in the system. These mechanical losses are joined together in one term, being the transmission efficiency . It is given by