Simultaneous 2D flow velocity and gas temperature measurements using thermographic phosphors

Omrane, Alaa; Petersson, Per; Aldén, Marcus; Linne, Mark

doi:10.1007/s00340-008-3051-1

Cited by 95 publications

(43 citation statements)

References 10 publications

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“…The principle of this thermographic PIV technique has been demonstrated for time-averaged [2] and single-shot measurements [1,3,4] as well as at kHz rates for temporally resolved measurements [5]. A similar concept called thermographic laser Doppler velocimetry was also demonstrated for point-wise measurements with high spatial resolution using continuous wave lasers and photomultiplier tubes [6].…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of the luminescence properties of BAM:Eu2+ particles as a tracer for thermographic particle image velocimetry

2015

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dependence on the laser fluence is observed, while the measured intensity ratio is shown to be insensitive to both seeding density and the oxygen volume fraction. Finally, the saturation behaviour of the phosphorescence emission is examined, through theoretical considerations and measurements performed with different excitation schemes in an attempt to increase signal levels. In conclusion, this paper confirms that BAM:Eu 2+ is a very suitable tracer for measurements in turbulent flows up to 900 K.

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Section: Introductionmentioning

confidence: 99%

“…In recent years, there have been several studies using thermographic phosphors for gas thermometry [1][2][3][4][5][6][7][8][9][10][11][12][13], and different phosphors have been used. Some important luminescence properties of these phosphors are indicated in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of the luminescence properties of BAM:Eu2+ particles as a tracer for thermographic particle image velocimetry

2015

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“…Furthermore, PIV may be expanded beyond the two-dimensional, twocomponent (2D-2C) velocity fields (as described here) to resolve 3-components (3C) in a plane (stereo-PIV) and in a volume (tomographic PIV, scanning PIV, holographic PIV). Additionally, PIV may be implemented with other techniques such as planar laser-induced fluorescence (PLIF), filtered Rayleigh scattering (FRS), and thermographic phosphors to achieve simultaneous 2D measurements of velocity and other scalars (temperature, species concentration, equivalence ratios) [11][12][13][14] . These optical, laser-based methods can be directly applied to investigate mass and energy exchange processes in many applications, such as the near-wall flows in an internal combustion engine.…”

Section: Discussionmentioning

confidence: 99%

High-speed Particle Image Velocimetry Near Surfaces

Sick

2013

JoVE

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Multi-dimensional and transient flows play a key role in many areas of science, engineering, and health sciences but are often not well understood. The complex nature of these flows may be studied using particle image velocimetry (PIV), a laser-based imaging technique for optically accessible flows. Though many forms of PIV exist that extend the technique beyond the original planar two-component velocity measurement capabilities, the basic PIV system consists of a light source (laser), a camera, tracer particles, and analysis algorithms. The imaging and recording parameters, the light source, and the algorithms are adjusted to optimize the recording for the flow of interest and obtain valid velocity data.Common PIV investigations measure two-component velocities in a plane at a few frames per second. However, recent developments in instrumentation have facilitated high-frame rate (> 1 kHz) measurements capable of resolving transient flows with high temporal resolution. Therefore, high-frame rate measurements have enabled investigations on the evolution of the structure and dynamics of highly transient flows. These investigations play a critical role in understanding the fundamental physics of complex flows.A detailed description for performing high-resolution, high-speed planar PIV to study a transient flow near the surface of a flat plate is presented here. Details for adjusting the parameter constraints such as image and recording properties, the laser sheet properties, and processing algorithms to adapt PIV for any flow of interest are included.

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“…Both gas streams were seeded with 2 lm BaMgAl 10 O 17 :Eu 2? (BAM:Eu) phosphor particles using inhouse built reverse cyclone seeders.…”

Section: Test Casesmentioning

confidence: 99%

“…When two spectrally filtered images of the particle phosphorescence emission are recorded, the tracer temperature can be determined using a ratio-based method. At low repetition rates, this technique has previously been demonstrated for time-averaged [10] and single shot [11] simultaneous temperature and velocity measurements.…”

Section: Introductionmentioning

confidence: 99%

High-speed planar thermometry and velocimetry using thermographic phosphor particles

et al. 2013

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Simultaneous gas-phase temperature and velocity imaging using micrometer-size thermographic phosphor particles seeded into the flow is demonstrated at a 3 kHz repetition rate. The velocity field is measured using a standard particle image velocimetry approach, while the temperature is determined from the temperature sensitive phosphorescence emission of the particles following excitation at 355 nm. Since the particles are very small, they rapidly assume the temperature and velocity of the surrounding gas. A single shot temperature precision of better than 5 % was achieved at 500 K. Time-resolved measurements in the wake of a heated cylinder are presented, demonstrating the utility of these imaging diagnostics to observe transient, coupled heat and mass transfer phenomena.

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Simultaneous 2D flow velocity and gas temperature measurements using thermographic phosphors

Cited by 95 publications

References 10 publications

Characterisation of the luminescence properties of BAM:Eu2+ particles as a tracer for thermographic particle image velocimetry

Characterisation of the luminescence properties of BAM:Eu2+ particles as a tracer for thermographic particle image velocimetry

High-speed Particle Image Velocimetry Near Surfaces

High-speed planar thermometry and velocimetry using thermographic phosphor particles

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