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Object tracking-based droplet characterization on high flowrate electrospray for PM removal.

Number: 3250

Author(s) : JUNG M., KIM S., KU D., JEONG S., BAE S., SEO G., KIM M.

Summary

Electrospray is a phenomenon of liquid atomized into small droplets when subjected to high electrostatic potential difference. The cone-jet mode, which forms a stable cone and produces fine monodisperse droplets has been mostly focused on the previous studies. Flowrate of the cone-jet mode were limited at only few microliter/min scale to prevent corona discharge. However, in the electrospray mode for particulate matter removal, high flowrate of several milliliter/min is used to obtain a sufficient liquid-to-gas ratio. In this high flowrate condition, the applied voltage required to atomize the liquid increases, and 2D and 3D spraying mode that have not been shown in previous studies appears. In this study, the electrospray droplet diameter under high flowrate condition was measured by the shadowgraph method using a high-speed camera. Multi-layer image processing algorithm was employed in order to measure the droplet diameter from pixel occupied in the original image. Bias caused by the difference in the probability of being included in the image depending on the speed of the droplet, was corrected through object tracking. Finally, corrected droplet diameter distribution of each spraying mode under high flowrate condition was measured. Results of this study provide new guidance for calculating the droplet lifetime surviving evaporation and dust collection efficiency in an actual scrubber condition.

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Pages: 8 p.

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Details

  • Original title: Object tracking-based droplet characterization on high flowrate electrospray for PM removal.
  • Record ID : 30030221
  • Languages: English
  • Source: 2022 Purdue Conferences. 7th International High Performance Buildings Conference at Purdue.
  • Publication date: 2022
  • Document available for consultation in the library of the IIR headquarters only.

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