DEVICE FOR DETERMINING TEMPERATURE OF GASEOUS MEDIA IN GAS TURBINE ENGINES Russian patent published in 2018 - IPC G01K7/02 G01K13/02 G01J5/00 G01M9/06 

FIELD: measurement technology.

SUBSTANCE: invention relates to the field of contact measurements of parameters of high-temperature gases, in particular to means of measuring the temperature of a gas and the distribution of its values in the cavities of the high-temperature elements of gas-turbine engines, and can be used for experimental studies of the working process of power plants during aerodynamic tests. Device for determining the temperature of the gaseous medium in gas turbine engines comprises a holder with a drive placed in the housing, a main and additional thermocouple installed in the holder, connected through the registration units of thermal EMF to an electronic adder, calibrator for thermocouples and a source of thermal radiation for heating thermocouples, made with the possibility of placing it in the cavity of the device, the holder is installed in the housing with the possibility of vertical movement, the thermal springs of the primary and secondary thermocouples are thermally insulated with each other, and the surface layers of the thermal spans are made of materials with different absorption coefficients. Device is equipped with an optical meter of thermal radiation, having a lens and a rotary actuator and placed on the opposite side of the source of thermal radiation relative to the holder with thermocouples, and a heat insulating screen installed between the heat radiation meter and the thermocouple holder and having a measuring hole, designed and positioned so that its area is completely shaded by thermocouple thermocouples, and the calibrator for thermocouples is made in the form of a black body model with a heater and a calibrated hole directed towards the lens of the optical meter of thermal radiation.

EFFECT: improving the accuracy of the results obtained by eliminating the error of the readings of thermocouples associated with the indirect determination of the characteristics of their thermal junctions when determining the temperature of the high-temperature gaseous medium by the method of linear extrapolation.

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