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(국민대학교) (국민대학교) (국민대학교) (국민대학교) (국민대학교)
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한국자동차공학회 한국자동차공학회 춘계학술대회 2013 KSAE 부문 종합학술대회
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    초록·키워드

    The application of SCR systems has been considered an effective exhaust after-treatment method for NOx emission control. Current Urea-SCR systems is possible to achieve 90% NOx if the NH3:NOx ratio is 1:1.
    However, the reaction has a limited non-uniformity of the exhaust gas flow and ammonia concentration distribution. A uniformity index is developed to evaluate the mixture quality in front of the SCR catalyst, which could also serve as an indirect indication of the de-NOx efficiency of the SCR system.
    Current papers have been presented the geometrical effects on flow mixing by using 3D Computational Fluid Dynamics (CFD) tool. In this paper, it is presented that the NOx reduction rate has been influenced by the flow uniformity index of NH3 in front of the catalytic converter by using 3D Computational Fluid Dynamics(CFD) tool. In order to achieve uniform flow at monolith front face, we have been changed with a various diffuser angle and mixer blade angle. It is found that the smaller diffuser angle and mixer blade angle are better NH3 uniformity in front of the SCR catalyst.

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      UCI(KEPA) : I410-ECN-0101-2014-550-002586214