DLR Portal
Home|Sitemap|Contact|Accessibility Imprint and terms of use Privacy Cookies & Tracking |Deutsch
You are here: Home:Departments and Groups:Combustion Diagnostics
Advanced Search
Key Research Topics
Departments and Groups
Chemical Kinetics and Analytics
Computer Simulation
Gas Turbines
Combustion Diagnostics
Multiphase Flow and Alternative Fuels
High-pressure Experiments
Research Facilities
Projects
Publications
Job Opportunities
Press Release
How to find us
Back
Print

Phosphor thermometry
(Determination of surface temperatures)



By UV irradiation, phosphors (luminescent materials) can be excited to emit phosphorescence. For many phosphor materials, the spectral composition and the lifetime of the phosphorescence are temperature-dependent. Therefore the temperature of the phosphor can therefore be determined from the decay time of the phosphorescence when short laser pulses are used for the excitation. If a substrate, for example a combustion chamber wall, is coated with a thin layer of phosphor, the surface temperature of the substrate can be measured by this method. Depending on the phosphor material a temperature range of up to approximately 1700 K is accessible.

This technique is applied in our institute to determine surface temperatures of burner and combustion chamber parts during operation. The results yield, for instance, information about heat transfer processes or heat loads of combustor walls.

 Decay curves of the phosphorescence at different surface temperatures after excitation by a UV laser pulse.
zum Bild Decay curves of the phosphorescence at different surface temperatures after excitation by a UV laser pulse.

Related Articles
Rayleigh Scattering
Raman Scattering
CARS
Absorption Spectroscopy
LIF
LII
PIV
Simultaneous Use
High-speed Imaging
LIPS
Phosphor Thermometry
Research Fields
Development of methods
Sooting flames
Thermoacoustics
Alternative fuels
Standard flames
Gas turbine combustion
Applications
Equipment
Related Topics
Fluid Mechanics and Thermodynamics
Copyright © 2022 German Aerospace Center (DLR). All rights reserved.