Visualization of Instantaneous Temperature Field Using Thermographic Phosphor Thermometry

2014 ◽  
Vol 136 (8) ◽  
Author(s):  
Seung Jae Yi ◽  
Hyun Dong Kim ◽  
Kyung Chun Kim
Keyword(s):  
Temperature Field ◽  
Thermographic Phosphor ◽  
Phosphor Thermometry ◽  
Instantaneous Temperature

Photogallery Entry 4

In-cylinder thermographic PIV combined with phosphor thermometry using ZnO:Zn

2021 ◽  
pp. 146808742110485
Author(s):  
Andreas Kopf ◽  
Valerio Frattina ◽  
Michele Bardi ◽  
Torsten Endres ◽  
Gilles Bruneaux ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Thermal Quenching ◽  
Temperature Fields ◽  
Ratio Method ◽  
Calibration Data ◽  
Two Dimensional ◽  
Ic Engine ◽  
Thermographic Phosphor ◽  
Phosphor Thermometry ◽  
Coated Surfaces

Two-dimensional thermographic particle image velocimetry (T-PIV) is presented for the in situ measurement in optically accessible internal combustion (IC) engines. Temperature and velocity measurements are combined using thermographic phosphor particles as tracers for PIV. For three commercially available phosphors (BAM:Eu2+, ZnO, and ZnO:Zn), temperature sensitivity, luminescence intensity at high temperatures and laser-fluence dependence were evaluated for phosphor-coated surfaces in a high-temperature cell. ZnO:Zn was identified as the best-suited candidate for engine in-cylinder measurements and further analyzed in the aerosolized state at temperatures up to 775 K to generate calibration data required for signal quantification in engine experiments. T-PIV was successfully applied in the IC engine to simultaneously obtain instantaneous two-dimensional velocity and temperature fields using the intensity-ratio method. Despite a measurement uncertainty (±1σ basis) of only 3.7 K at 317 K (1.2%) to 24.4 K (4.2%) at 575 K, this technique suffers from low signal intensities due to thermal quenching at increasing temperatures, which leads to reduced accuracy as the piston approaches top dead center. Thermographic measurements were successful to visualize local temperature changes due to evaporative cooling after fuel injection. The measured mean gas temperatures agreed well with zero-dimensional simulations that use additional wall-temperature measurements from thermographic phosphor measurements based on the lifetime method as input for heat transfer calculations.

Numerical Simulation on Real-Time Temperature Field and Strength Field of Bridge Mass Concrete

2011 ◽  
Vol 99-100 ◽  
pp. 346-349
Author(s):  
Chun Mei Zhu ◽  
You Zhi Wang ◽  
Bin Yan ◽  
Hong Wei Gao
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Stress Field ◽  
Real Time ◽  
Simulation Analysis ◽  
Mass Concrete ◽  
Construction Scheme ◽  
Control Schemes ◽  
Concrete Temperature ◽  
Instantaneous Temperature

Access to the internal concrete temperature of the instantaneous temperature field and the strength of the field Real-time monitoring , Concrete temperature field and stress field of the numerical simulation analysis method was proposed . Intuitive accurate prediction that the temperature field and stress field provide a reliable basis on the distribution of temperature control schemes and the construction scheme formulated.

Eu-doped Y2O3 phosphor films produced by electrostatic-assisted chemical vapor deposition

1999 ◽  
Vol 14 (7) ◽  
pp. 3111-3114 ◽  
Author(s):  
K. L. Choy ◽  
J. P. Feist ◽  
A. L. Heyes ◽  
B. Su
Keyword(s):  
Chemical Vapor Deposition ◽  
High Temperature ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Cost Effective ◽  
Thermographic Phosphor ◽  
Ni Alloy ◽  
Phosphor Thermometry ◽  
Lifetime Decay ◽  
Deposited Films

Europium-doped yttrium oxide (Y2O3:Eu) thermographic phosphor films were deposited on Ni-alloy substrates using a novel and cost-effective electrostatic-assisted chemical vapor deposition (EACVD) technique. The thermoluminescence properties were studied under irradiation by an ultraviolet laser. It was found that crystallized Y2O3: Eu films could be deposited at a temperature as low as 550 °C. Annealing of the as-deposited films at higher temperatures (>1000 °C) improved the luminescence properties due to further crystallization processes. The correlation of the lifetime decay and temperature change of the films showed that the EACVD-deposited films are suitable for use in phosphor thermometry for high-temperature applications.

Effect of frost on phosphorescence for thermographic phosphor thermometry

2017 ◽  
Vol 28 (12) ◽  
pp. 125202 ◽  
Author(s):  
Dong Kim ◽  
Mirae Kim ◽  
Kyung Chun Kim
Keyword(s):  
Thermographic Phosphor ◽  
Phosphor Thermometry
Sign in / Sign up

Export Citation Format

Share Document