Temperature measurements of single droplets by use of laser-induced phosphorescence

Omrane, Alaa; Juhlin, Greger; Ossler, Frederik; Aldén, Marcus

doi:10.1364/ao.43.003523

Cited by 64 publications

(43 citation statements)

References 17 publications

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“…Laser induced phosphoresce from thermographic phosphors was used to measure temperature of single falling droplets [90]. The droplets were excited using 266 nm Nd:YAG.…”

Section: Survey Of Recent Applications Using Thermographic Phosphormentioning

confidence: 99%

Thermographic Phosphors for High Temperature Measurements: Principles, Current State of the Art and Recent Applications

Khalid

Kontis

2008

Sensors

336

172

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This paper reviews the state of phosphor thermometry, focusing on developments in the past 15 years. The fundamental principles and theory are presented, and the various spectral and temporal modes, including the lifetime decay, rise time and intensity ratio, are discussed. The entire phosphor measurement system, including relative advantages to conventional methods, choice of phosphors, bonding techniques, excitation sources and emission detection, is reviewed. Special attention is given to issues that may arise at high temperatures. A number of recent developments and applications are surveyed, with examples including: measurements in engines, hypersonic wind tunnel experiments, pyrolysis studies and droplet/spray/gas temperature determination. They show the technique is flexible and successful in measuring temperatures where conventional methods may prove to be unsuitable.

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“…Laser induced phosphoresce from thermographic phosphors was used to measure temperature of single falling droplets [90]. The droplets were excited using 266 nm Nd:YAG.…”

Section: Survey Of Recent Applications Using Thermographic Phosphormentioning

confidence: 99%

Thermographic Phosphors for High Temperature Measurements: Principles, Current State of the Art and Recent Applications

Khalid

Kontis

2008

Sensors

336

172

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“…In the study of Omrane et al (2004a), measurements are performed on water droplets on the order of one millimeter in diameter falling from a heated tank into air at room temperature. Both lifetime and two-line methods were applied using, respectively, La 2 O 2 S:Eu and Mg 4 FGeO 6 :Mn.…”

Section: Thermographic Phosphorsmentioning

confidence: 99%

Temperature and chemical composition of droplets by optical measurement techniques: a state-of-the-art review

2013

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“…There are reports on the use of the phosphor La2O2S:Eu 3+ for the measurement of temperatures of liquid films, droplet and sprays [8][9][10]. These studies used low repetition-rate pulsed nitrogen or Nd:YAG lasers for excitation, and PMTs or ultra-high-speed framing cameras (~100 MHz) for point and 2D detection respectively.…”

Section: Introductionmentioning

confidence: 99%

Thermographic laser Doppler velocimetry using the phase-shifted luminescence of BAM:Eu^2+ phosphor particles for thermometry

Ojo¹,

Fond²,

Abram³

et al. 2017

Opt. Express

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Simultaneous point measurements of gas velocity and temperature were recently demonstrated using thermographic phosphors as tracer particles. There, continuous wave (CW) excitation was used and the spectral shift of the luminescence was detected with a two-colour intensity ratio method to determine the gas temperature. The conventional laser Doppler velocimetry (LDV) technique was employed for velocimetry. In this paper, an alternative approach to the gas temperature measurements is presented, which is instead based on the temperature-dependence of the luminescence lifetime. The phase-shift between the luminescence signal and time-modulated excitation light is evaluated for single BaMgAl10O17:Eu 2+ phosphor particles as they cross the probe volume. Luminescence lifetimes evaluated in the time domain and frequency domain indicate that in these experiments interferences from in-phase signals such as stray excitation laser light are negligible. The dependence of the phase-shift on flow temperature is characterised. In the temperature sensitive range above 700 K, precise gas temperature measurements can be obtained (8.6 K at 840 K) with this approach.

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Temperature measurements of single droplets by use of laser-induced phosphorescence

Cited by 64 publications

References 17 publications

Thermographic Phosphors for High Temperature Measurements: Principles, Current State of the Art and Recent Applications

Thermographic Phosphors for High Temperature Measurements: Principles, Current State of the Art and Recent Applications

Temperature and chemical composition of droplets by optical measurement techniques: a state-of-the-art review

Thermographic laser Doppler velocimetry using the phase-shifted luminescence of BAM:Eu^2+ phosphor particles for thermometry

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