Monitoring temperature for gas turbine blade: correction of reflection model

Abstract. For a gas turbine blade working in a narrow space, the accuracy of blade temperature measurements is greatly impacted by environmental irradiation. A reflection model is established by using discrete irregular surfaces to calculate the angle factor between the blade surface and the hot adjacent parts. The model is based on the rotational angles and positions of the blades, and can correct for measurement error caused by background radiation when the blade is located at different rotational positions. This method reduces the impact of reflected radiation on the basis of the turbine’s known geometry and the physical properties of the material. The experimental results show that when the blade temperature is 911.2±5  K and the vane temperature ranges from 1011.3 to 1065.8 K, the error decreases from 4.21 to 0.75%.

[1]  António Araújo,et al.  Monte Carlo uncertainty simulation of surface emissivity at ambient temperature obtained by dual spectral infrared radiometry , 2014 .

[2]  Bjoern Schenk,et al.  Development and Evaluation of a High-Resolution Turbine Pyrometer System , 2002 .

[3]  P. Heller,et al.  Pyrometric Temperature Measurements on Solar Thermal High Temperature Receivers , 2006 .

[4]  Lixin Wang,et al.  Multi-spectral pyrometer for gas turbine blade temperature measurement , 2014, Optics & Photonics - Optical Engineering + Applications.

[5]  Paul C. Ivey,et al.  An overview of the measurement errors associated with gas turbine aeroengine pyrometer systems , 2002 .

[7]  C. Lanfranchi,et al.  An infrared pyrometry system for monitoring gas turbine blades - Development of a computer model and experimental results , 1994 .

[8]  J. H. Horlock,et al.  Turbine Blade Cooling: The Blade Temperature Distribution , 2006 .

[9]  Maurizio De Lucia,et al.  An Infrared Pyrometry System for Monitoring Gas Turbine Blades: Development of a Computer Model and Experimental Results , 1992 .

[10]  M. Willsch,et al.  New approaches for the monitoring of gas turbine blades and vanes , 2004, Proceedings of IEEE Sensors, 2004..

[11]  E. Sparrow,et al.  Radiation Heat Transfer , 1978 .

[12]  C. Gueymard,et al.  Analysis and Experimental Results of Solar-Blind Temperature Measurements in Solar Furnaces , 2004 .

[13]  Paul C. Ivey,et al.  Optical pyrometry for gas turbine aeroengines , 2004 .

[14]  Matthias Voigt,et al.  The effect of surface reflection and surrounding environment on target temperature estimation using an infrared FPA , 2007, SPIE Defense + Commercial Sensing.

[15]  M. Sekavčnik,et al.  Measurements on rotating blades using IR thermography , 2007 .

[16]  Mariusz Kastek,et al.  Automatic compensation of emissivity in three-wavelength pyrometers , 2007 .

[17]  Mariusz Kastek,et al.  Pyrometric Method of Temperature Measurement with Compensation for Solar Radiation , 2010 .