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분체 이송관내 압력 조절을 위한 오리피스 주위에서의 입자 유동 및 마모 해석
조형희,이재근,박호동,서태원,Cho, Hyung-Hee,Lee, Jae-Keun,Park, Ho-Dong,Seo, Tae-Won 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.11
A numerical study is performed to investigate pressure drops, particle trajectories and erosion around orifice plates in pulverized coal pipe lines. Particle impaction rates change significantly with orifice shapes and Stokes numbers. At Reynolds number of $5{\times}10^5$, the pulverized coal flows well with streamlines and do not collide at the orifice plates at small sizes (${\sim}20{\mu}m$). However, the large particles (over $70{\mu}m$) impact on the front face of the orifice and erode the orifice surface. The pressure loss coefficients around the erode orifice are largely different from the designed original orifice.
조형희(Hyung Hee Cho) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
This paper presents the curriculum of creative design and experimental education of School of Mechanical Engineering in Yonsei University. The experimental education has been changed to increase an interest of students and to adjust the needs by industries. New classes of Creative design project(1),(2),(3) have been developed to increase student’s creativity, synthesis ability, design skills, teamwork, and leadership in mechanical engineering.