A Novel Measuring Technique Utilizing Temperature Sensitive Paint—Measurement Procedure, Validation, Application, and Comparison With Infrared Thermography

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
M. Lorenz ◽  
T. Horbach ◽  
A. Schulz ◽  
H.-J. Bauer
Keyword(s):  
Surface Temperature ◽  
Infrared Thermography ◽  
Film Cooling ◽  
Maximum Deviation ◽  
Temperature Sensitive ◽  
Calibration Technique ◽  
Accuracy Measurement ◽  
In Situ Calibration ◽  
Temperature Sensitive Paint

A novel method for surface temperature measurement using temperature sensitive paint (TSP) is presented. Precalibration of the TSP is shown and a semi in situ calibration technique using thermocouples is provided for high accuracy measurement. The method presented is applied to a film cooling experiment with a maximum surface temperature of 430 K and compared to highly reliable infrared thermography measurements that serve as benchmark results. The in situ calibration technique shows a maximum deviation of 0.5 K from the thermocouple readings. The comparison of laterally averaged temperature distributions of TSP and infrared measurement shows excellent agreement.

Infrared Thermography With In-Situ Calibration Using Thermochromic Liquid Crystals Applied to Film Cooling

2004 ◽  
Author(s):  
Dennis Brauckmann ◽  
Jens von Wolfersdorf
Keyword(s):  
Liquid Crystals ◽  
Infrared Thermography ◽  
Film Cooling ◽  
Test Surface ◽  
Surface Distribution ◽  
Cooling Effectiveness ◽  
Film Cooling Effectiveness ◽  
In Situ Calibration ◽  
Thermochromic Liquid Crystals

This paper presents an application of infrared thermography measurements on a film cooled flat surface using a single cylindrical film cooling hole. Infrared thermography (IR) is used to obtain the full field surface distribution of the temperature and therefore the film cooling effectiveness. For accurate results in-situ calibration of the infrared radiation intensity during the experiment needs to be performed, which is usually done using surface mounted thermocouples. For the near hole region thermochromic liquid crystals (TLC) are applied to obtain additional information for the calibration. A mixture of two narrow band TLCs is used, leading to discrete temperature lines on the surface. Using small variations in the test temperature settings, the TLC-lines can be located on the test surface into the regions of interest and the influence on the obtained infrared calibration results can be investigated. Experimental results for the film cooling effectiveness are presented for several blowing rates.

Improved in situ calibration technique for ITER ex-vessel neutron yield monitor

2006 ◽  
Vol 81 (8-14) ◽  
pp. 1497-1502 ◽  
Author(s):  
K. Asai ◽  
T. Iguchi ◽  
T. Nishitani ◽  
C.I. Walker ◽  
J. Kawarabayashi ◽  
...  
Keyword(s):  
Neutron Yield ◽  
Calibration Technique ◽  
Yield Monitor ◽  
In Situ Calibration

In-situ calibration technique for x-ray films

1984 ◽  
Vol 23 (5) ◽  
pp. 762 ◽  
Author(s):  
Daniel Pasini ◽  
Andrew Ng ◽  
A. J. Barnard
Keyword(s):  
Calibration Technique ◽  
X Ray ◽  
In Situ Calibration

scholarly journals Heat Transfer Determined by the Temperature Sensitive Paint Method

2018 ◽  
Vol 2018 (4) ◽  
pp. 45-57
Author(s):  
Łukasz Jeziorek ◽  
Krzysztof Szafran ◽  
Paweł Skalski
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Surface Temperature ◽  
Transfer Coefficient ◽  
Thermal Power ◽  
Test Method ◽  
Temperature Sensitive ◽  
Complex Objects ◽  
Temperature Sensitive Paint ◽  
The Heat Transfer Coefficient

Abstract The paper presents practical aspects of determining the amount of heat flow by measuring the distribution of surface temperature using the Temperature Sensitive Paint (TSP) method. The quantity measured directly with TSP is the intensity of the excited radiation, which is then converted to surface temperature. The article briefly presents three different methods for determining the heat transfer coefficient. Each of these methods is based on a separate set of assumptions and significantly influences the construction of the measuring station. The advantages of each of the presented methods are their individual properties, allowing to improve accuracy, reduce the cost of testing or the possibility of using them in tests of highly complex objects. For each method a mathematical model used to calculate the heat transfer coefficient is presented. For the steady state heat transfer test method that uses a heater of constant and known thermal power, examples of the results of our own research are presented, together with a comparison of the results with available data and a discussion of the accuracy of the results obtained.

scholarly journals A spatially resolved in situ calibration applied to infrared thermography

2019 ◽  
Vol 30 (8) ◽  
pp. 085201 ◽  
Author(s):  
Maximilian Elfner ◽  
Tobias Glasenapp ◽  
Achmed Schulz ◽  
Hans-Jörg Bauer
Keyword(s):  
Infrared Thermography ◽  
Spatially Resolved ◽  
In Situ Calibration
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