Surface thermometry in combustion diagnostics by sputtered thin films of thermographic phosphors

Pareja, Jhon; Litterscheid, Christian; Kaiser, Bernhard; Euler, M.; Fuhrmann, N.; Albert, Barbara; Molina, Alejandro; Ziegler, Jürgen; Dreizler, Andreas

doi:10.1007/s00340-014-5803-4

Cited by 7 publications

(3 citation statements)

References 42 publications

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“…The calibration curve of YAG:Tb for a coating on quartz differs significantly from the powder sample. Such behavior has already been observed for other phosphors and substrates [27,31]. It was speculated that this might be caused by changes in the structure of the phosphor.…”

Section: Discussion Of Different Phosphorssupporting

confidence: 59%

Wall Temperature Measurements in Gas Turbine Combustors With Thermographic Phosphors

Nau

Yin

Lammel

et al. 2018

Journal of Engineering for Gas Turbines and Power

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Phosphor thermometry has been developed for wall temperature measurements in gas turbines and gas turbine model combustors. An array of phosphors has been examined in detail for spatially and temporally resolved surface temperature measurements. Two examples are provided, one at high pressure (8 bar) and high temperature and one at atmospheric pressure with high time resolution. To study the feasibility of this technique for full-scale gas turbine applications, a high momentum confined jet combustor at 8 bar was used. Successful measurements up to 1700 K on a ceramic surface are shown with good accuracy. In the same combustor, temperatures on the combustor quartz walls were measured, which can be used as boundary conditions for numerical simulations. An atmospheric swirl-stabilized flame was used to study transient temperature changes on the bluff body. For this purpose, a high-speed setup (1 kHz) was used to measure the wall temperatures at an operating condition where the flame switches between being attached (M-flame) and being lifted (V-flame) (bistable). The influence of a precessing vortex core (PVC) present during M-flame periods is identified on the bluff body tip, but not at positions further inside the nozzle.

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Section: Discussion Of Different Phosphorssupporting

confidence: 59%

Wall Temperature Measurements in Gas Turbine Combustors With Thermographic Phosphors

Nau

Yin

Lammel

et al. 2018

Journal of Engineering for Gas Turbines and Power

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“…The method has been intensively employed to study combustion processes [7,8], for example with the aim to increase the efficiency of an engine. Many studies measured the local gas temperature inside the combustion chamber, often together with an analysis of the velocity of the gas flow [9] or the gas concentration [10] as well as surface temperature measurements of the walls of the combustion volume [11,12] or measurements of the local surface temperature of porous burners [13] or a Swirl burner [14]. By choosing appropriate phosphors, moderate temperature regions may also be characterized well [15,16].…”

Section: Introductionmentioning

confidence: 99%

Temperature measurements using YAG : Dy and YAG : Sm under diode laser excitation (405 nm)

Hashemi

Vetter

Jovičić

et al. 2015

Meas. Sci. Technol.

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Temperature-sensitive phosphors offer an option of accurate contactless temperature measurement. The method can be applied to a wide temperature range and up to more than 1500 K. In the current paper, phosphor thermometry based on four rare earths doped in YAG was studied. The standard excitation of thermographic phosphors is carried out with a Nd : YAG laser often at 355 or 266 nm. We examined the temperature dependent luminescence at an excitation wavelength of 405 nm. The excitation with visible blue light offers two main advantages: the excitation sources are rather cheap and they involve less safety issues. Accordingly, a variety of new application of such remote-thermometry would be possible. The results show that YAG : Dy and YAG : Sm may be well utilized for phosphor thermometry excited by a 405 nm diode laser.

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“…Here, a phosphor with known temperaturedependent luminescence is applied as a thin film at the measurement spot and excited by light such as a laser, e.g. [12,13] (remark: also temperature of gasses may be measured when using phosphor powders, e.g. [14][15][16]).…”

Section: Introductionmentioning

confidence: 99%

Contactless temperature determination using dual-channel lock-in phosphor thermometry

Hashemi¹,

Jovičić²,

Batentschuk³

et al. 2016

Meas. Sci. Technol.

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In this paper, we present dual-channel lock-in phosphor thermometry, which offers an option of accurate and contactless temperature determination under high environmental noise. We studied YAG:Dy as thermographic phosphor at an excitation wavelength of 405 nm. We tested our approach under different experimental conditions with noise levels of about 550, 1060 and 2190 times larger than the excitation signal. With the dual-channel lock-in setup, we were able to suppress the strong noise in all cases and to reliably determine surface temperature using our optical measurements (error < 10 K). Additionally, the effect of signal to noise ratio, lock-in frequency and lock-in bandwidth on temperature determination accuracy was studied in this work.

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Surface thermometry in combustion diagnostics by sputtered thin films of thermographic phosphors

Cited by 7 publications

References 42 publications

Wall Temperature Measurements in Gas Turbine Combustors With Thermographic Phosphors

Wall Temperature Measurements in Gas Turbine Combustors With Thermographic Phosphors

Temperature measurements using YAG : Dy and YAG : Sm under diode laser excitation (405 nm)

Contactless temperature determination using dual-channel lock-in phosphor thermometry

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