DESIGN AND DEVELOPMENT OF WATER COOLED PROBES TO MEASURE PRESSURE AND TEMPERATURE IN HIGH TEMPERATURE, HIGH PRESSURE ENVIRONMENT

摘要

The measurement of total pressure and total temperature of gas at the inlet of a turbine cascade is essential during the testing of the cooling configuration of turbine blade. A Water cooled probe was designed and developed to operate in a high pressure high temperature environment to measure the gas parameters in the order of pressure 25 bar, temp 1700 K, and velocity up to 150 m/sec. The pressure calibration of probe was carried out in the Calibration lab of GTRE at Mach numbers in the range of 0.3 -0.6. The temperature calibration to find out recovery factor was not carried out due to lack of a suitable facility, but a comparative study was carried out in Heat transfer rig of GTRE with a similar uncooled probe. The total estimated uncertainty in pressure and temperature calibration is in the range of 2% - 4%.