What is the peak pressure in a gas turbine typically measured in?

The peak pressure in a gas turbine is typically measured in absolute pressure. This is the standard method because absolute pressure takes into account the total pressure exerted, including atmospheric pressure, thus providing a more comprehensive understanding of the pressure conditions within the system.

Using absolute pressure is particularly important in the context of gas turbines where precise measurements are necessary for performance calculations, system efficiency, and operational safety. Given that gas turbines operate in various atmospheric conditions and altitudes, absolute pressure gives an accurate representation irrespective of external influences.

In contrast, gage pressure measures pressure relative to atmospheric pressure and does not provide the total pressure experience in the system. Vacuum pressure also indicates pressure below atmospheric pressure and is not relevant for measuring the peak pressure in a gas turbine, while atmospheric pressure simply refers to the pressure exerted by the weight of the atmosphere at a given location. Therefore, absolute pressure is the most suitable measure in this context.