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논문 : 생물생산시설 및 환경공학 ; 소규모 복도-더그매 예열 음압환기방식 무창자돈사의 최적 환기 요건에 관한 연구
이승주 ( S. J. Lee ),장동일 ( D. I. Chang ),황선호 ( S. H. Hwang ),( W. M. Gutierrez ),장홍희 ( H. H. Chang ) 한국농업기계학회 2010 바이오시스템공학 Vol.35 No.6
This study was carried out to determine necessary conditions for optimal ventilation of small windowless piglet house (4.0 (W) × 11.0 (L) × 2.6(H) m) with corridor and attic for preheating using CFD (Computational Fluid Dynamics) simulation. The experimental weaning piglet house was consisted of a corridor, an attic, 4 rooms (3.0 (W) × 2.75(L) m), 3 fences (0.7(H) m), 5 air inlets and 2 exhaust fans (0.4 (D) m) and simulated using CFD code, FLUENT. The simulation results for the experimental weaning piglet house showed that each room was uniformly ventilated under all the experimental conditions and air velocities at 0.1 m above floor are less than 0.15 m/s for 0.75 m/s and 1.0 m/s of air inlet velocity but 0.61 m/s for 1.25 m/s. The simulation results are similar to the measured results. Considering the air flow pattern, ventilating efficiency, air velocity at 0.1 m above floor and cold stress of weaning piglets and so on, the optimum velocity of air inlet might be 1.0 m/s.
김세윤(S.Y.Kim),황선호(S.H.Hwang),장효환(H.W.Chang) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Some control algorithms for TCS are proposed through computer simulation. They are<br/> algorithm based on the slip threshold, algorithm based on the acceleration threshold and algorithm based on the slip and acceleration thresholds, and the operating time difference between the TCS valve and the ABS valve is also considered as a system parameter in these algorithms. Algorithm based on the slip and acceleration<br/> thresholds shows better response characteristics than algorithm based on the slip threshold or algorithm based on the acceleration threshold, only. In case of considering the operating time difference between the two valves, it is showed that the wheel velocity error becomes smaller and the drivability becomes better than those of not considering them. Finally. it is verified that the proposed algorithms of this research have similar response characteristics compared with the road test results of the actual vehicle.<br/>
황선호 한국부식학회 1981 Corrosion Science and Technology Vol.10 No.1
철강재료에서 수소와 전위와의 상호작용을, 수소의 물리적 상호작용에 의한 전위운동의 방해, 수소의 물리적 상호작용에 의한 전위운동의 촉진, 수소의 화학적 상호작용에 의한 전위운동의 방해, 이상 3가지로 구분하고 마지막의 경우가 수소유기 파괴 내지 응력부식파괴의 원인이 됨이 몇 가지 실험적 결과 및 논리적 추리로부터 주장되었다. 내수소 내지 내응력 부식파괴성 철강재료의 개발은, 격자내 고응된 불순원소의 농도를 감소시키므로서 이루어질 수 있다는 것이 동주장으로부터 유도되었다.