Ash pulverized coal deposition in combustors and gasifiers

Technical Report · Wed Dec 31 04:00:00 EST 1997

OSTI ID:600687

Ahmadi, G

Further progress in achieving the objectives of the project was made in the period of April 1 to June 30, 1997. The computational modeling of particle transport, dispersion and deposition in a recirculating turbulent flows was completed. Considerable progress was also made in the direct numerical simulation of particle removal process in turbulent gas flows. It is shown that the near wall vortices profoundly affect the particle removal process in turbulent boundary layer flows. The predictions of the particle resuspension model is compared with the experimental data. It is shown that when the effects of the near wall flow structure, as well as the surface roughness are included the model agrees with the available experimental data. The sublayer model for evaluating the particle deposition in turbulent flows was extended to include the effect of particle rebound. A new more advanced flow model for the near wall vortices is also used in these analyses. Experimental data for transport and deposition of glass fibers in the aerosol wind tunnel was obtained. The measured deposition velocity is compared with the empirical correlation and the available data and discussed.

• Research Organization: Clarkson Univ., Potsdam, NY (United States). Dept. of Mechanical and Aeronautical Engineering
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
• DOE Contract Number: FG22-94PC94213
• OSTI ID: 600687
• Report Number(s): DOE/PC/94213--T9; ON: DE97054290
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
AIR FLOW
ASHES
COAL
COMBUSTORS
DEPOSITION
EXPERIMENTAL DATA
GASIFICATION
MATHEMATICAL MODELS
PARTICLES
PROGRESS REPORT
TRANSPORT