Which method is commonly used for temperature measurement in turbine engines?

Thermocouples for reference comparison are commonly used for temperature measurement in turbine engines due to their ability to withstand high temperatures and respond quickly to changes in temperature. They function by generating a voltage that is proportional to the temperature difference between two junctions, allowing for accurate measurement of the hot gas path temperatures within turbine engines. This is essential for monitoring engine performance and ensuring safe operating conditions.

In turbine engines, precise temperature measurements are crucial. Thermocouples are typically used in multiple locations throughout the engine to monitor the conditions in critical areas, such as the combustion chamber and turbine section. Their robust design and reliability in extreme environments make them the preferred choice for such applications.

Other methods mentioned, such as infrared sensors, may provide non-contact temperature readings but are generally not as reliable for the extreme conditions in turbine engines. Thermistors, while effective at lower temperatures, operate well below the ranges encountered in turbine applications. Lastly, pressure gauges are meant for measuring pressure and not directly suitable for temperature detection in this context.