1991
DOI: 10.1115/1.2906554
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Evaluating Thermographic Phosphors in an Operating Turbine Engine

Abstract: The results of a field test in a commercial turbine engine showed that we can remotely measure the temperature of engine components in operating engines using thermographic phosphors. The remote-measurement method exploits the temperature dependence of the characteristic decay time of the laser-induced fluorescence of thermographic phosphors. This paper summarizes recent work leading up to and including a successful test of the thermographic-phosphor method in an operating turbine engine.

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Cited by 22 publications
(14 citation statements)
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“…Thermographic phosphors are materials whose luminescent properties, such as the fluorescent decay time, intensity, breadth and position are all sensitive to changes in temperatures and change predictably with temperature [1,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The luminescent properties are influenced by changes in the ligand field surrounding the fluorescing ion with temperature.…”
Section: Introductionmentioning
confidence: 99%
“…Thermographic phosphors are materials whose luminescent properties, such as the fluorescent decay time, intensity, breadth and position are all sensitive to changes in temperatures and change predictably with temperature [1,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The luminescent properties are influenced by changes in the ligand field surrounding the fluorescing ion with temperature.…”
Section: Introductionmentioning
confidence: 99%
“…The TP layers must also be durable. The most widely used techniques for bonding thermographic phosphors based systems to surfaces are (14) :…”
Section: Thermographic Phosphor Bonding Techniquesmentioning
confidence: 99%
“…Therefore, the temperature of phosphor-coated surfaces can be determined by measuring their luminescence properties after laser excitation. In combustion applications, surface thermometry based on TPs has been used in static [2][3][4][5] or moving systems [6]. In contrast to other phosphors, the decay time of Mg 4 FGeO 6 :Mn is not influenced by oxygen quenching or varying absolute pressure [7].…”
Section: Introductionmentioning
confidence: 99%