Pressure screening is an efficient means of removing various contaminants that degrade the appearance and strength of paper. A critical component of a screen is the rotor, which induces a tangential velocity to the suspension and produces pressure pulses to keep the screen apertures clear. To understand the effect of key design and operating variables for a NACA foil rotor, a computational fluid dynamic (CFD) simulation was developed using FLUENT, and the results were compared to experimental measurements. Comparing the pressure pulses obtained through CFD to experimental measurements over a wide range of foil tip speeds, clearances, angles of attack, and foil cambers, general trends of the pressure pulses were similar, but the overall computed values were 40% smaller than the measured values. The pressure pulse peak was found to increase linearly with the square of tip speed for all the angles of attack studied. The maximum magnitudes of negative pressure pulse occurred for the NACA 0012 and 4312 foils at a angle of attack and for the NACA 8312 foil at . The stall angle of attack was found to be for NACA 8312, for NACA 4312, and for NACA 0012. The positive pressure peak near the leading edge of the foil was eliminated for foils operating at a positive angle of attack. The magnitude of the negative pressure coefficient peak increased as clearance decreased. Increased camber increases both the magnitude and width of the negative pressure pulse.
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March 2005
Technical Papers
Numerical Simulation and Experimental Measurement of Pressure Pulses Produced by a Pulp Screen Foil Rotor
Mei Feng,
Mei Feng
Pulp and Paper Centre and Department of Mechanical Engineering,
The University of British Columbia
, 2385 East Mall, Vancouver BC, Canada, V6T 1Z4
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Jaime Gonzalez,
Jaime Gonzalez
Pulp and Paper Centre and Department of Mechanical Engineering,
The University of British Columbia
, 2385 East Mall, Vancouver BC, Canada, V6T 1Z4
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James A. Olson,
James A. Olson
Pulp and Paper Centre and Department of Mechanical Engineering,
The University of British Columbia
, 2385 East Mall, Vancouver BC, Canada, V6T 1Z4
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Carl Ollivier-Gooch,
Carl Ollivier-Gooch
Department of Mechanical Engineering,
The University of British Columbia
, 2324 Main Mall, Vancouver BC, Canada, V6T 1C4
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Robert W. Gooding
Robert W. Gooding
Advanced Fiber Technologies (AFT) Inc.
, Montreal QC, Canada, H4A 1G2
Search for other works by this author on:
Mei Feng
Pulp and Paper Centre and Department of Mechanical Engineering,
The University of British Columbia
, 2385 East Mall, Vancouver BC, Canada, V6T 1Z4
Jaime Gonzalez
Pulp and Paper Centre and Department of Mechanical Engineering,
The University of British Columbia
, 2385 East Mall, Vancouver BC, Canada, V6T 1Z4
James A. Olson
Pulp and Paper Centre and Department of Mechanical Engineering,
The University of British Columbia
, 2385 East Mall, Vancouver BC, Canada, V6T 1Z4
Carl Ollivier-Gooch
Department of Mechanical Engineering,
The University of British Columbia
, 2324 Main Mall, Vancouver BC, Canada, V6T 1C4
Robert W. Gooding
Advanced Fiber Technologies (AFT) Inc.
, Montreal QC, Canada, H4A 1G2J. Fluids Eng. Mar 2005, 127(2): 347-357 (11 pages)
Published Online: October 29, 2004
Article history
Received:
August 11, 2003
Revised:
October 29, 2004
Citation
Feng, M., Gonzalez, J., Olson, J. A., Ollivier-Gooch, C., and Gooding, R. W. (October 29, 2004). "Numerical Simulation and Experimental Measurement of Pressure Pulses Produced by a Pulp Screen Foil Rotor." ASME. J. Fluids Eng. March 2005; 127(2): 347–357. https://doi.org/10.1115/1.1881672
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