Abstract
A novel 2D-technique for temperature visualization of single droplets and sprays is presented. Laser induced emission from thermographic phosphor seeded to the investigated liquid was detected by a fast framing camera. The subsequent phosphorescence images measured by seven consecutively gated CCD detectors allowed pixel-to-pixel lifetime evaluation of the phosphorescence emission. The temperature at each pixel position was evaluated using a calibration procedure of temperature against lifetime. These measurements were applied first to a free falling water based droplet, then to a suspended droplet in an ultrasonic levitator. Finally, the technique was applied to spray.
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07.20.Dt; 46.65.Fi; 32.50.+d; 43.25.Uv; 34.50.Gb
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Omrane, A., Särner, G. & Aldén, M. 2D-temperature imaging of single droplets and sprays using thermographic phosphors. Appl. Phys. B 79, 431–434 (2004). https://doi.org/10.1007/s00340-004-1584-5
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DOI: https://doi.org/10.1007/s00340-004-1584-5