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수치해석 기법에 의한 천정형 에어컨 토출기류의 유동 안정성에 관한 연구
전현주(Hyun-Joo Jeon),라선욱(Seon-Uk Na),길성호(Seong-Ho Kil),이창선(Chang-Seon Lee) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
This paper presents numerical analysis of exit-flow instabilities on a single outlet ceiling air conditioner. This study is carried out with the commercial S/W, FLUENT, for steady and unsteady state conditions. The flow instabilities occur due to flow separation along the rear-guider, which further cause the variations in vortex core position and the magnitude of vorticity at the inside of cross flow fan. As single outlet ceiling air conditioner has some different internal flow pattern and the control method for discharge flow from side-wall mounted air conditioner(RAC), we should consider in some different ways for designing of those air conditioners.
에어컨 실외기 홴의 강풍(역풍)조건하에서의 신뢰성 평가에 대한 해석적 연구
송우석(Woo-Seog Song),김병건(Byung-Ghun Kim),길성호(Seong-Ho Kil),이창선(Chang-Seon Lee) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
Sometimes damaged fans by the storm or hurricane have been reported in the air-conditioner industry. High-speed reverse rotating of the fan caused by the external force from strong winds, especially without-driving condition. In this paper, a numerical analysis procedure to evaluate the reliability of the high-speed reverse rotating fan in air-conditioner outdoor unit by ultimate exterior flow velocities is proposed. Information of the reverse RPM and pressure distributions of blade surfaces are determined from 3-dimensional CFD analysis method and link directly to the structural analysis method to evaluate the structural stability factors. In addition, the results of this procedure expect to be useful to evaluate the reliability of outdoor unit fan and the suitability of the installing condition for system.
吉成鎬 大田産業大學校 1994 한밭대학교 논문집 Vol.11 No.0101
This paper aims to analyse the objectives and methodology of architectural expression, and to identify the characteristics of experience-structure of human being on architecture. For this purpose, much of thesises, based on the normative and positive theory which contain the themes on the approach to architectural expression, are comparatively analysed. From this preliminary analysis, the five categories of the objectives of architectural expression are systemized, and then the relationships of the effect-structure of work(architecture) and experience-structure of human being, based on methodological approaches to architectural expression, are identified. On the basis of the results of this researches, the direction of the methodological approach to architectural expression considering experience-structure, is suggested.
吉成鎬 大田産業大學校 1994 한밭대학교 논문집 Vol.11 No.0201
The purpose of this paper is to analyse the axis as compositional principle of urban space and to propose the reasonable approach to architectural and urban design. For this objectives, the concept and characteristics of the axis in design are surveyed in detailed. And the relatinships of the urban space structure and the axis as compositional principles including Paris, Peking, Ideal Ciyt of Renaissance, London, Athens, and Medival City, are comparatively alnalysed from the view of axis. As the results of this study, it is suggested the importance of urban space structure and axis in architectural and urban design approach.