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http://dx.doi.org/10.5762/KAIS.2021.22.3.74

Experimental Study on Mixing Efficiency of Exhaust Gas and Reductant According to SCR Mixer Shape  

Choe, Munseok (Dipartment of Smart e-Automobile, Yeungnam University College)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.3, 2021 , pp. 74-79 More about this Journal
Abstract
This study examined the mixing efficiency of exhaust gas and urea according to the mixer shape in the SCR system. For the experiment, an SCR simulation system was manufactured, and a uniformity detector was attached to the catalyst location to measure the uniformity. The experiment was conducted by setting the exhaust-gas flow rate, temperature, mixer type, and catalyst distance as variables. The experimental results confirmed the swirl angle analysis, urea number distribution, and uniformity. The swirl angle experiment of Models A and B confirmed that the swirl angle of Model A was formed approximately 7 to 8 degrees higher over the entire RPM range. When there was no mixer in the SCR system, the urea and water were concentrated to one side. Mixer Model A showed an even distribution overall, and Model B showed a slightly concentrated tendency at the beginning but then showed a stable distribution of urea. The mixing efficiency of 90%, which was the uniformity target, could be satisfied in Model A and Model B. In particular, Model A showed excellent results that satisfied 90% efficiency at 10 cm of the catalyst position.
Keywords
SCR(Selective Catalystic Reduction; Exhaust Gas; NOx; Uniformity Index; Swirl Angle;
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Times Cited By KSCI : 1  (Citation Analysis)
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