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김유 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(B)
Convective heat transfer coefficients at the nozzle throat were calculated from existing unsteady state exact solution and direct experimental temperature measurements. Results were compared to the prediction from Bartz's simple correlated equation and other experimental data. The test results well agreed with other experimental data except initial combustion phase. Bartz's prediction was considerably higher than experimental value. Temperature was measured with 8 thermocouples from four different depth of nozzle throat. Combustion material was composite of ammonium perchlorate, polybutadiene and 2% of aluminium.
N - Octadecane의 상변화 열전달현상에 관한 연구
김유,황태연,김기운,Kim, Y.,Hwang, T.Y.,Kim, K.W. 대한설비공학회 1989 설비공학 논문집 Vol.1 No.2
Experimental and numerical analysis were performed to investigate the heat transfer phenomena during phase change. N-octadecane were used as a phase change material and TRUMP computer code was used as a numerical tool. Also, two quarter segment of cylinder shape was chosen as a vessel to simulate to this research. The major contribution factor on the solidus surface movement was environmental temperature and the effect of roller gap and material initial temperature were insignificant. Experimental and numerical results were generally in good agreement and the effect of the mesh size ($22{\times}22$ and $33{\times}33$) was negligible.
Top Boy에 드러난 공영주택단지와 흑인 공동체 재현
김유 한국현대영미드라마학회 2022 현대영미드라마 Vol.35 No.3
Council estates, the multi-storey tower blocks in Britain, were built in the early 20th century in order to improve housing affordability for the low-income inner-city working class. Throughout the post-war era, however, they have degenerated into the poorest and the most marginalized communities. Dominant media discourses which stigmatize council estates, highlight the sensational behaviors of the estates residents, eliminating their ‘quotidian’ experience and thus reducing the lived realities of the community to a dangerous, violent space. Top Boy, a British television drama series set in the housing estates of East London, moves beyond the generic conventions of crime drama and entails a piquant critique of the British society in the 21st century. The series focuses on the social inequalities and economic deprivation of the black community in the social welfare blind spots. This paper understands Top Boy as a challenge to the existing council estates discourses and evaluates the way the series attempts to represent the most underprivileged space in the interactions of class tension, racism and neo-liberalism. The paper examines the council estates as class-segregated and racialised space, focusing on cinematography in Top Boy. It also explores the way the quotidian experiences in the estates are reinstated through the narrative of Ra’Nell, a black teenager, and demonstrates how Top Boy revises the moralistic, behavioural aspects of the existing council estates discourses. Finally, the paper discloses how community solidarity in Top Boy challenges the established discourses which reduce the complex realities of the council estates to a simple tale of social dysfunction.