http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
석유화학 플랜트용 Ball Valve 유동특성에 관한 수치해석
이병호(Byung Ho Lee),박재우(Jae Woo Park),최홍태(Hong Tae Choi),이종헌(Joong Hoon Lee),이중섭(Chung Seub Yi) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
This study have goal with reverse engineering for petrochemistry of high pressure ball valve for localization. Ball valve for development accomplished with flow analysis based on provision of ANSI B16.34, ANSI B16.10, ANSI B16.25 In order to localize the petrochemistry high pressure control valve. Numerical simulation using CFD(Computational Fluid Dynamic) in order to predict a mass flow rate and a flow coefficient form flow dynamic point of view. The working fluid assumed the water(H₂O). The valve inlet and outlet setup a pressure boundary condition. The outlet pressure was fixed by atmospheric pressure and calculated inlet velocity 5m/s. CFD solver used STAR-CCM+ which is commercial code. The result shows change of mass flow rate according to opening and closing angle of valve. Flow decrease observed open valve that quick opening flow pattern which is general inclination of ball valve.
이병호(Byung Ho Lee),이중섭(Chung seub Yi),김영진(Young Jin Kim),김보한(Bo Han Kim),정효민(Hyo Min Jeong),정한식(Han Shik Chung) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Although combustion is essential in most energy generation processes, it is one of the major causes of air pollution. Circle fin exhaust pipes were designed to study the effect of cooling the recirculated exhaust gases (EGR) of Diesel engines on the chemical composition of the exhaust gases and the reduction in the percentages of pollutant emissions. The gases examined in this study were oxides of nitrogen (NOx), carbon dioxide (CO₂) and carbon monoxide (CO). In addition, O₂ concentration in the exhaust was measured. The designs adopted in this study were exhaust pipes with solid and hollow fins around them direct surface force measurement in water using a nanosize colloidal probe Technique The direct force measurement between colloidal surfaces has been an essential topic in both theories and applications of surface chemistry. As panicle size is decreased from micron size down to true Carbon nano Colloid size (<10㎚), surface forces are increasingly important. Nanoparticles at close proximity or high solids loading are expected to show a different behavior than what can be estimated from continuum and mean field theories. The current tools for directly measuring interaction forces such as a surface force apparatus or atomic force microscopy (AFM) are limited to particles much larger than nanosize. Here a modified colloidal probe technique is suggested using a multiwalled
손병규(Byung-Kyu Sohn),이정우(Jeong-Woo Lee),이병호(Byung-Ho Yi),윤한삼(Han-Sam Yoon) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회지 Vol.34 No.4
본 연구에서는 2종류의 피라미드형 패조류용 인공어초의 안정성 평가를 위해 Froude 상사법칙을 적용한 고정상 및 이동상 수리모형실험을 수행하였으며, 현장 설계외력(파랑, 흐름 등) 조건에 따라 이론적/실험적 검토를 하였다. 실험 결과는 파랑-흐름 공존장에서 어초의 안정성에 영향을 미치는 무차원영향인자(설계파라메타)인 쇄파상사지수, 수립자속도, 파압 등을 사용하여 상호관련성을 검토하였다. 그 실험결과, 어초의 활동을 일으키는 한계조건은 고정상 실험에서는 쇄파상사지수에 따라서 무차원 최대수립자속도가 약 0.4 이상일 때, 이동상 실험에서는 무차원 파압에 따라서 상대수심이 약 0.11 이하일 때 나타났다. 또한 상대수심에 따른 수평 및 연직 파압은 상대수심이 증감함에 따라서 선형적으로 감소하는 경향을 나타내었다. This study conducted hydraulic testing to assess the stability of two types of pyramid-shaped artificial reefs (ARs) constructed to promote the growth of shellfish and seaweed. Previous theoretical and hydraulic experimental studies have clearly demonstrated Froude similitude. The results of this study revealed that some dimensionless design parameters affected the stability of both types of artificial reefs under various wave and current field conditions (e.g., surf similarity parameters, water particle velocity, wave pressure). In the fixed bed condition, the dimensionless water particle velocity based on the surf similarity parameter was large (about 0.4), and in the moveable bed condition, the relative water depth based on the dimensionless wave pressure was low (about 0.11). In addition, horizontal wave pressure and uplift pressure varied by relative water depth, demonstrating the tendency for wave pressure to decrease linearly with increased relative depth. These findings indicate that the development of more stable design technology forartificial reefs should be based on long-term data and additional study of sliding due to wave action. The findings also highlight the importance of hydraulic experiments in solving problems that have emerged in the design and construction of artificial reefs.
Numerical Analysis on the Thermal and Fluid in Air Conditioning Duct for Marine Offshore
Chung-Seob Yi(이중섭),Byung-Ho Lee(이병호),Do-Hun Chin(진도훈) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.2
This study is about distributions of heat transfer in air conditioning duct used for marine and oil drilling ship. As the convective heat transfer coefficient increased, heat transfer was conducted dynamically to inside as it exited to the outlet of duct. So, it was checked that the amount of heat transfer generated at duct increased as the convective heat transfer coefficient increased. In case the convective heat transfer coefficient was low, the temperature of duct showed the relatively high temperature distribution due to the temperature influence of internal fluid as the heat transfer between the outside and inside of the duct. In case of temperature distribution generated the volume of the duct along the change of the convective heat transfer coefficient, it was found out that the temperature descended as heat transfer was promoted and the convective heat transfer coefficient increased.
Numerical Analysis on the Thermal and Fluid in Air Conditioning Duct for Marine Offshore
Chung-Seob Yi(이중섭),Byung-Ho Lee(이병호),Do-Hun Chin(진도훈) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.5
This study is about the distribution of heat transfer in air conditioning ducts used for marine vessels and oil drilling platforms. As the convective heat transfer coefficient increased, heat transfer was conducted dynamically to inside as it exited to the outlet of duct. The experiment was to determine if the amount of heat transfer generated at the duct exit increased as the convective heat transfer coefficient increased. When the convective heat transfer coefficient was low, the temperature of the duct showed a relatively high temperature difference between the outside and inside of the duct due to the temperature influence of the internal fluid. In case of temperature distribution generated the volume of the duct along the change of the convective heat transfer coefficient, the temperature descended as heat transfer was promoted and the convective heat transfer coefficient increased.
이중섭(Chung-Seob Yi),이병호(Byung-Ho Lee),진도훈(Do-Hun Chin) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.3
This study concerns the distributions of flow in an air conditioning duct used for a marine and oil drilling ship. From the results of carrying out flow analysis and structural analysis of a ventilation duct applied to a marine structure, the following conclusion could be gained. The pressure tended to increase as the flow velocity at the inlet increased and the pressure at the inlet increased. It was recognized that the pressure decreased due to the influence of a corrugated tube when it entered and exited from the duct. As a result of structural analysis, a higher train was generated at the corrugated tube compared with the duct. In addition, in the case of the internal pressure of 0.7MPa, which was the designed load, it was found that there was almost no influence as it was within 0.1mm.
이중섭(Chung Seob Yi),이병호(Byung Ho Lee) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.5
In this study, the experiment result and numerical analysis on temperature distribution of a secondary battery module for high temperature operation type were compared. Because experimental battery has been in danger of explosions, experiment on temperature distribution was carried out using dummy batteries. Study on NAS battery module, which is secondary battery of high temperature operation type, is as follows ; Test result showed that battery"s temperature is in steady state uniformly after 8 hours in each section. It is similar to experimental result for temperature distribution from the result of numerical analysis, and it takes about 8.5 hours to the 300°C.