http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
비정상 유동해석을 이용한 축류팬의 스윕각 변화에 대한 소음 특성 연구
정우열(Woo-youl Jung),임차유(Cha-you Lim),조경석(Kyung-seok Cho),이덕주(Duck-joo Lee) 대한설비공학회 2013 대한설비공학회 학술발표대회논문집 Vol.2013 No.6
This study had been carried out for automotive axial fan using three dimensional unsteady CFD analysis including shroud. The test and predicted result from steady state CFD analysis was compared with. It showed a very good agreement between test and the prediction of air flow rate. Two fans with different sweep angle showed quite different performance and noise level. Especially the overall noise of forward swept fan is lower 2 to 3 dB than straight blade fan with the same flow rate. To figure out where this difference came out three dimensional unsteady state CFD analysis was carried out for two fans. And the differences of flow characteristics between swept and straight blade was analysed. Also aero-acoustic calculation was performed in this paper using unsteady flow analysis result. Acoustic characteristics of two fans and differences between evaluation and analysis are presented.
국내 지형, 환경특성 고려 유해화학물질 거동해석 시스템 개발
정우열(Woo-Youl Jung),임동연(Dong-Yun Lim),최정우(Jeung-Woo Choi),서재민(Jae-Min Seo) 한국위험물학회 2019 한국위험물학회지 Vol.7 No.1
As the nature of recent disasters is diversified, enlarged, and complex, disasters caused by chemical accidents are more difficult to deal with than natural or man-made disasters in terms of scale and damage. In addition, the damage does not remain as a simple primary damage but leads to secondary and tertiary damage, which leads to long-term damage. Therefore, importance of initial response and restoration support is increasingly emphasized. In this study, we define the methodology of the detailed diffusion model based on a wind field model considering topography, environmental characteristics, and a leakage rate calculation model considering the container leakage and the pool evaporation. In other words, in this study developed a system that can provide more accurate response information in the event of hazardous chemical leakage accident.
자동차용 증발기 판 내의 증발 열전달 및 유동 특성에 관한 실험적 연구
곽경민,주상우,정우열,김택근,김광일,Kwak, Kyung-Min,Joo, Sang-Woo,Jung, Woo-Youl,Kim, Taek-Keun,Kim, Kwang-Il 한국자동차공학회 2007 한국 자동차공학회논문집 Vol.15 No.2
An experimental study was performed to evaluate the in-plate evaporation heat transfer and flow characteristics of a evaporator used in automobile. Two test-cores with different heat transfer area, bead-shape and bead-array were tested, A type and B type. For the heat transfer, Nusselt number for B type test-core reaches a value nearly equal to the one for A type test-core, in the whole range of equivalent Reynolds number. But, for the same mass flow rate of refrigerant, hA for B type test-core becomes higher with the increase of the mass quality of refrigerant than for A type test-core. In a flow visualization experiment, the wake zone of refrigerant circulating at u-turn position of plate is observed.
정우열 경운대학교 산업기술연구소 1998 産業技術硏究論文誌 Vol.1 No.1(A)
Information Technology has steadily permeated public organizations int he past two decades, occasionally experienced dramatic expansion. so Information Technologie have become increasingly important to contemporary public organizations. This study is Changes of Public Organization as Introduction of Information Technology. According to the analysis of the data collected from the literature research, analysis in the Use of Information Technologie and public Organization attributable to the use of Computer could make the public organization far more changed by increase of jobs, the number of hierarchical levels and the degree of personal, the degree of centralization and decentralization, the power structure, the increase of the business rules and a supervision. However, much uncertainty exists regarding public organization by the Information Technology.
지방의회의 예산심의과정에서 정책정보 활용에 관한 연구 : 경상북도 도의회의 사례
정우열 경운대학교 산업기술연구소 1999 産業技術硏究論文誌 Vol.1 No.1(B)
The budget review process of local council is in charge of an important function of checking the executive whitch is going to be the bureaucracy and of maintaining blance with the executive for the development of local government. The budget review of local council should not be used as the political means, nor should it be the obstraction of local harmony by giving benefits only to the minority. So in the budget review process, the political application of information for local harmony should essentially be a matter of infortance. And the provincial members' hardly obtain this information and professional knowledge because they are not professional man. In this point of view, the purpose of this paper is to analyze positively actual conditions that the councilor use the policy information, and to seek the way of improving the policy information use. The datas used in this research are council records of KyongPook provincial (1998), questionnaire, and councilors' memorandums. The analysis was made by simple statisics which verified the frequencies analysis. To improve policy information of the members through the stable act of the budget review, the solutions to problems are the fellowings: we must institute the cooperative system about the offer of data and investigation in the administrative office. positive cooperation with the assistance of policy information for the budget review in necessary.
전산의 사용에 따른 업무능률성 분석 : 경상북도 구미시청의 사례 The Case of Gu Mi City Hall, Kyong Sang Book Do
김시영,정우열 영남대학교 지역발전연구소 1998 새마을지역개발연구 Vol.23 No.-
Nowadays, the Local government have become extensive users of computing. The increase in computing use has been based on the assumption is a tool which enables agencies to increase their business efficiency. According to the analysis of the data collected from the Gu-Mi city local government, analysis in efficiency attributable to the use of computing are perceived by local government employees in term of work speed, accuracy, cost saving, service improvement, and sense of accomplishment. However, much uncertainty exists regarding the utilization of time freed, coordination of service delivery by the use of computing.