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Flow and deposition characteristics of charged particles in DPF channel |
1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, Shandong 255000, China |
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Abstract To investigate the flow and deposition characteristics of charged particles in the diesel particulate filter (DPF), the DPF passes calculation model was established based on FLUENT simulation software, and the discrete phase model was used to simulate the flow and deposition of particles in the channel. The deposition thickness of particles under different charged voltages in the channel was determined by scanning electron microscope to verify the simulation. The results show that with the increasing of charge voltage, the velocity distribution linearly changes along the axis of inlet and outlet tunnel. The higher the charge voltage is, the more obvious the linear change is. The pressure in the inlet tunnel is increased for applied voltage, while the pressure in the outlet tunnel has little change. With the increasing of charge voltage, the wall seepage velocity changes smoothly along the tunnel, and the distribution of particle deposition in the channel tends to be uniform. The higher the voltage is, the more uniform the particles deposition distribution is.
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Received: 04 August 2017
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