Evaluation of a Fluidic Temperature Sensor/Air Ejector Assembly.

摘要

A fluidic, edgetone resonator sensor designed for gas temperature measurement at the compressor inlet of gas turbine engines was fabricated and evaluated on a burner rig at simulated engine conditions. Tested with the sensor was an air ejector used to lower the sensor back pressure to maintain proper sensor operation (choked flow at the discharge orifices) over the entire range of engine flight conditions. Steady-state performance of the sensor/ejector combination when compared with test thermocouples was acceptable in terms of both accuracy and repeatability. Transient response performance,however,was somewhat less than desired. Subsequent heat transfer analyses revealed the problem areas and identified several likely improvements.