Simulation of Spray Transfer Processes in Electrostatic Rotary Bell Sprayer

[+] Author and Article Information
Kyoung-Su Im, Ming-Chia Lai, Sheng-Tao John Yu

Department of Mechanical Engineering, Wayne State University, Detroit, Michigan 48202, USA

Robert R. Matheson

Dupont Herberts Automotive Systems, Troy, Michigan 48007, USA

J. Fluids Eng 126(3), 449-456 (Jul 12, 2004) (8 pages) doi:10.1115/1.1758263 History: Received September 13, 2002; Revised February 04, 2004; Online July 12, 2004
Copyright © 2004 by ASME
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Regions: a) near field, b) transport field, and c) target field of the paint spray
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The interactions of three main processes in transport field
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A schematic of the computational domain
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Bell atomizers: a) original, b) numerical
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Initial and boundary conditions reconstructed from experimental data
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Electrostatic potential contours at different positions
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Velocity components (u,v,w) on the z-axis at y=center
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Air flow angular velocity in the z-direction at different axial positions
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Comparison of the numerical and experimental spray characteristics at the following operating condition: 150 l/min of shaping air, 50k rpm of bell speed, 90kv of electric force, and 150 ml/min liquid flow rate
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Sensitivity of the spray flow to charge to mass ratio at the following operating condition: 30k rpm of bell speed, 150 l/min of shaping air, 90kV of electric setting, and 150 ml/min of liquid flow rate
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Sensitivity of the spray flow to bell speed at the following operating conditions: 150 l/min of shaping air, 90kV of electric force, and 150 ml/min of liquid flow rate
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Drop mass distribution on the target plane along z-axis direction at y=center



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