Investigation and Application of Calibration Method for Aeroengine Low Pressure Turbine Exit Temperature

The phenomenon of low pressure turbine exit temperature sampled by the digital electric controller was higher than test stand digital collection system in the course of aeroengine trial test.Multiple temperature measurement tests were carried out,combined with the principle of T6 temperature measurement,electric characteristics of the thermocouple and compensatory lead etcetera.The method of temperature calibration from the end of digital electric controller circuit was brought to ensure the temperature of T6 measured by digital electric controller was closed to the actual temperature in the process of engine trial test actually.The test results show that the T6 value difference between sampled by the digital electric controller and sampledty test stand digital collection system is no more than 1℃,the fact proves that the calibration method is accurate and feasible.