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http://dx.doi.org/10.7464/ksct.2020.26.1.22

Effect of Particulate Matter and Ash Amount on Pressure Drop and Flow Uniformity of Diesel Particulate Filter Reduction System  

Kim, YunJi (Department of Environment-Energy Engineering, The University of Suwon)
Han, DanBee (Department of Environment-Energy Engineering, The University of Suwon)
Seo, TaeWon (Department of Environment-Energy Engineering, The University of Suwon)
Oh, KwangChul (Korea automotive technology institute)
Baek, YoungSoon (Department of Environment-Energy Engineering, The University of Suwon)
Publication Information
Clean Technology / v.26, no.1, 2020 , pp. 22-29 More about this Journal
Abstract
Recently, as the fine dust is increased and the emission regulations of diesel engines have been tightened, interest in diesel soot filtration devices has rapidly increased. There is specifically a demand for the technological development of higher diesel exhaust gas after-treatment device efficiency. As part of this, many studies were conducted to increase exhaust gas treatment efficiency by improving the flow uniformity of the exhaust gas in the diesel particulate filter (DPF) and reducing the pressure drop between the inlet and the outlet of DPF. In this study, the effects of pressure drop by the flow rate and temperature of exhaust gas, DPF I/O ratio, Ash, and PM amount in diesel reduction device were simulated via a 12" diameter DPF and diesel oxidation catalyst (DOC) using ANSYS Fluent. As the flow rate and temperature decreased, the pressure drop decreased, whereas the PM amount affected the pressure drop more than the ash amount and the pressure drop was lower in anisotropic DPF than isotropic DPF. In the case of DPF flow uniformity, it was constant regardless of the various variables of DPF. In ESC and ETC conditions, the filtration efficiency for PM was similar regardless of anisotropic and isotropic DPF, but the filtration efficiency for PN (particle number) was higher in anisotropic DPF than isotropic DPF.
Keywords
DPF (diesel particulate filter); Computational Fluid Dynamics; Flow Uniformity; Pressure Distribution; Pressure Drop;
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