DESIGN OF ATOMIZERS AND BURNERS FOR COAL-WATER SLURRY COMBUSTION

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A detailed compressible airflow analysis was performed on the central air passage of the triple-concentric atomizer. The results show that a minimum mass flow rate of 0.33 g/s ({approx}16 L/min at STP) of air at a supply pressure of 296 kPa(absolute) is required to create a sonic flow at the atomizer exit, which is 0.97 mm in diameter. This result confirms the hypothesis that previous parametric visualization studies of the spray cone did not have sonic air flow in all cases. Additionally, Phase/Doppler droplet size and velocity measurements were made in sprays of both water and a dilute solution (0.05% ... continued below

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13 pages

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Hitron, Rony; Humphrey, William & Chigier, Norman October 1, 1998.

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Description

A detailed compressible airflow analysis was performed on the central air passage of the triple-concentric atomizer. The results show that a minimum mass flow rate of 0.33 g/s ({approx}16 L/min at STP) of air at a supply pressure of 296 kPa(absolute) is required to create a sonic flow at the atomizer exit, which is 0.97 mm in diameter. This result confirms the hypothesis that previous parametric visualization studies of the spray cone did not have sonic air flow in all cases. Additionally, Phase/Doppler droplet size and velocity measurements were made in sprays of both water and a dilute solution (0.05% wt/wt) of high-molecular weight polyacrylamide. The measurements show small increases in mean drop size when the polymer is added to the liquid, which are nevertheless large compared to the percentage of polymer solute in the solution.

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13 pages

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OSTI as DE00781753

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  • Other Information: PBD: 1 Oct 1998

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  • Report No.: DE--FG22-95PC95105--12
  • Grant Number: FG22-95PC95105
  • DOI: 10.2172/781753 | External Link
  • Office of Scientific & Technical Information Report Number: 781753
  • Archival Resource Key: ark:/67531/metadc722242

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • October 1, 1998

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 15, 2016, 12:56 p.m.

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Hitron, Rony; Humphrey, William & Chigier, Norman. DESIGN OF ATOMIZERS AND BURNERS FOR COAL-WATER SLURRY COMBUSTION, report, October 1, 1998; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc722242/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.