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노경욱 한국가정과교육학회 2000 한국가정과교육학회 학술대회 Vol.2000 No.-
기업이 생산활동을 하기 위해서는 연구개발, 제조생산, 품질, 공정, 설비, 생산시스템등 다양한 부분에 일할 사람들이 필요하게 된다. 우리나라가 IMF를 거쳐 어려움이 있기도 하였지만 오늘날 짧은 기간에 고도성장을 이루어 12대 수출국이 될 수 있었던 것은 우리나라의 제조, 생산기술에 강점이 있었기 때문이라고 생각하며 그 저변에는 실업교유과 직업훈련 등을 통한 노동인력의 공급이 있었기 때문이라고 본다.
전기집진기 내부의 유동 균일성 향상을 위한 가이드 배인의 최적설계
노경욱(Kyung-Wook Noh),배성준(Seong-Jun Bae),박숙희(Sookhee Park),강선균(Sunkyun Kang),이장명(Jangmyung Lee) 대한전기학회 2013 전기학회논문지 Vol.62 No.4
In recent years, many efforts are increasingly being made to conserve the natural environment with enhanced emission standards and air quality standards. Also there are various methods necessary to be researched to minimize the emission of air pollutants. In particular, boilers of industrial facilities are major portions of the air pollution. The front duct which needs to be designed to reduce the gases to the electrostatic precipitator requires a bent tube, a reduction/extend tube and an auxiliary equipment, that is, a guide vane. This paper proposes an optimum design of the guide vane by a case study for electrostatic precipitator’s flow uniformity. The operating conditions of this study are as follows: BMCR (Boiler Maximum Continuous Rate) and MGR (Maximum Guaranteed Rate) are 75%, 50%, and 30%; turbulent fluid dynamics model is based upon K-ε formulation. Presentation of the computed motion of particles is found to be quite useful to predict the precipitator performance by use CFD (Computational Fluid Dynamics).
HfC-코팅 C/C 복합재료의 유효 물성 산출을 위한 미시역학 전산 해석
노경욱(Kyung Uk Roh),김호석(Ho Seok Kim),신의섭(Eui Sup Shin) 한국항공우주학회 2020 韓國航空宇宙學會誌 Vol.48 No.12
본 연구에서는 미시역학 전산 모형을 통해 열 보호 시스템에 사용되는 내열 코팅 재료의 유효 열전도도와 탄성 계수를 산출하고 분석하였다. 상용 프로그램 Simpleware를 이용하여 HfC로 코팅된 탄소/탄소 복합재료의 삼차원 전산 모형을 생성한 후 유한요소 해석을 수행하였다. 유효 물성의 경향을 확인하기 위해 코팅층의 기공도와 두께 변화를 고려하였다. 또한, 실제 시편을 제작하여 실험에서 온도에 따라 측정된 열전도도와 해석에서 산출된 열전도도를 서로 비교하였으며 해석 결과가 측정값에 근접하였다. 이를 통해 내열 코팅 재료의 유효 물성을 산출하는데 있어서 미시역학 전산 해석이 적절함을 확인하였다. In this study, the effective thermal conductivity and elastic modulus of heat-resistant coating materials are analyzed by using micromechanical computational models. Three-dimensional computational models for HfC-coated carbon/carbon composites were created with Simpleware, and finite element analysis was performed. The porosity and thickness changes in the coating layer were taken into account to identify the tendency of effective material properties. In addition, the coupon specimen was produced to compare the thermal conductivity measured by experiments with the one obtained by finite element analysis according to temperature changes, and the analysis results were close to the measured values. This confirms that micromechanical computational analysis is appropriate in the calculation of effective material properties of coating composites.
MR 브레이크를 이용한 햅틱 큐 가속페달 장치 설계 및 제어
노경욱(Noh, Kyung-Wook),한영민(Han, Young-Min),최승복(Choi, Seung-Bok) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.5
This paper proposes a new haptic cue vehicle accelerator pedal device using magnetorheological(MR) brake. As a first step, an MR fluid-based haptic cue device is devised to be capable of rotary motion of accelerator pedal. Under consideration of spatial limitation, design parameters are optimally determined to maximize control torque using finite element method. The proposed haptic cue device is then manufactured and integrated with accelerator pedal. Its field-dependant torque is experimentally evaluated. Vehicle system emulating gear shifting and engine speed is constructed in virtual environment and communicated with the haptic cue device. Haptic cue algorithm using the feed-forward control algorithm is formulated to achieve optimal gear shifting in driving. Control performances are experimentally evaluated via feed-forward control strategy and presented in time domain.