Non-contact Temperature Measurement System For Turbine Disk Testing

Turbine disk is a key component in gas turbine engine, so the performance of the disk impacts the characteristics of the aeroengine greatly. The surface temperature of the disk needs to be real-time monitoring when the disk is tested in a tester. At present, Thermocouples, thermal pyrometry and thermal paint are the most common method to detect the temperature in domestic and foreign research fields. Therefore, a non-contact temperature measurement method must be developed under the circumstance of high temperature, high-speed rotation, strong vibration and intense background radiation.The thesis introduces the radiation theory and the principle of radiation thermometry, and proposed a method to the compensation of the strong background radiation by the base of analysis of the actual application scenarios. And the technical solutions are three-band pyrometry and multi-spectral pyrometry. An integrated measurement system is designed and developed. The mechanical structure and the electronic signal acquisition and processing system to achieve signal acquisition and temperature control is designed based on the HgCdTe infrared detector and thermopile. Software dedicated to communication control, data acquisition, curve display, data storage and query is developed based on MFC.Experiments and tests are conducted to demonstrate the temperature measurement system can work feasibility, reliability, stability and accurately. Experiments to t he principle of the detector, blackbody calibration test are implemented on the test bed to simulate the application scenarios. Experiments demonstrate the feasibility of the designed non-contact temperature measurement system in theoretical and application field. The analysis of experimental results provides guidance for the further improvement and optimization of the pyrometry system.