• Title/Summary/Keyword: 미세형상

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Numerical Study of Impact for Particulate Matter Reduction Device According to Installation of Perforated Plate and Mixer on Marine Diesel Engine (선박용 디젤엔진의 미세먼지저감 장치에 다공판과 믹서의 장착이 미치는 영향에 대한 수치해석적 연구)

  • Yun, Byoungkyu;Cho, Sanghyun;Ryu, Younghyun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.25 no.7
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    • pp.968-973
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    • 2019

  • This study presents the characteristics of a pressure drop and uniformity index for a particulate matter reduction device with a perforated plate and mixer for marine diesel engines. The perforated plate and mixer equipped on the particulate matter reduction device induce an increase of exhaust gas reduction performance by increasing the uniformity index. Whereas, the perforated plate induces pressure drop increases in the particulate matter reduction device. Therefore to calculate the effect of the uniformity index and pressure drop of the perforated plates and mixer, this study combines several cases using five types of perforated plates and one type of mixer. Consequently, these results were analyzed to determine the optimized type and position of the perforated plate and mixer.

  • https://doi.org/10.7837/kosomes.2019.25.7.968 인용 PDF KSCI

Effects of Specimen Geometry on Stress Distribution in Sandwich Specimen Under Combined Loads (복합하중을 받는 샌드위치 시편의 응력분포에 미치는 시편 형상의 영향)

  • Park, Su-Kyeong;Hong, Sung-Tae
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.11
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    • pp.1587-1592
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    • 2010

  • The effects of specimen geometry and loading conditions on the stress distribution in a sandwich specimen under combined loads are investigated by elastic finite element analysis. A commercial software NASTRAN is used in plain-strain two-dimensional finite element analysis of sandwich specimens; the analysis was performed for three different specimen shape factors and four different combined displacement conditions. The results of computational analysis suggest that the effect of the combined displacement angle, which is defined as the ratio of the shear displacement to the normal displacement, on the size of the non-homogeneous stress distribution is observed only in the case of the shear stress and von Mises stress. Also as the combined displacement angle increases, the size of the nonhomogeneous stress distribution decreases in the case of the shear stress and increases in the case of the von Mises stress. In addition, as the specimen shape factor, which is defined as the ratio of the specimen length to the height, increases, the size of the non-homogeneous stress distribution under combined displacement conditions decreases significantly.

  • https://doi.org/10.3795/KSME-A.2010.34.11.1587 인용 PDF KSCI

기계적 미세 형상 금형가공 기술

  • 최두선;제태진;이응숙;신영재
    • Journal of the KSME
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    • v.42 no.6
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    • pp.64-69
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    • 2002

  • 이 글에서는 기계적 이세 금형가공 기술을 중성으로 기술의 동향과 현재 수행 중인 내용에 관하여 소개함으로써 이 분야에서의 국내 연구자들의 관심을 높이고 참여를 유도하고자 한다.

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