RISS 검색 - 국내학술지논문

1
경사텀블이 있는 4-밸브기관의 피스톤 크라운 형상설계를 위한 유동해석

노기철(K.C.Noh),박상욱(S.W.Park),배형민(H.M.Bae),김문헌(M.H.Kim),이종태(J.T.Lee) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
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In order to design the combustion chamber geometry of 4-valves engine with inclined tumble, the unsteady flow in-cylinder as so shapes of piston crowns was qulitatively and quantitatively measured by using PIV. The main results are as follows ; The piston crown shapes effect on flow pattern and flow characteristics such as strength of tumble moment, tumble ratio and etc. The biggest moment and tumble ratio were measured in a half covered piston crown shape.<br/>
2
프리피스톤 수소기관의 연소안정화 및 성능향상에 관한 연구

노기철,윤재성,김강문,박상욱,이종태,Noh, K.C.,Yoon, J.S.,Kim, K.M.,Park, S.W.,Lee, J.T. 한국수소및신에너지학회 2006 한국수소 및 신에너지학회논문집 Vol.17 No.2
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  ScienceON
  
  DBpia
A free-piston hydrogen fueled engine is considered as one of the next power systems which is able to obtain high efficiency and low emission, simultaneously. In this study, in order to ensure the possibility as the next generation power system, the combustion characteristics and the performance of the free-piston hydrogen fueled engine are analyzed by using the linear RICEM for the change of injection pressure and equivalence ratio. As the results, in-cylinder maximum pressure is shown at injection pressure $P_{inj}$=6bar. Backfire phenomenon is not observed under experimental condition and knock occurs over ${\Phi}=0.8$. The thermal efficiency is the highest at injection pressure, $P_{inj}$=6bar and equivalence ratio, ${\Phi}=0.7$, respectively.
3
밸브오버랩기간 변화에 의한 흡기관 분사식 수소기관의 역화억제에 관한 연구

강준경(J. K. Kang),Huynh Thanh Cong,노기철(K. C. Noh),이종태(J. T. Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
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To analyze the influence of valve overlap period on a backfire occurrence, the single cylinder research engine with MCVVT(Mechanical Continuous Variable Valve Timing) system is developed and backfire limit equivalence ratio defined as fuel-air ratio equivalence ratio at which backfire occurs is examined according to various valve overlap period. The MCVVT is the system to control valve overlap period by mechanical device. It is estimated that the lower valve overlap period has the higher backfire limit equivalence ratio though the same energy is supplied. When the valve overlap period is changed from 30° CA to 0° CA, backfire limit equivalence ratio is increased 74%, approximately. It means that valve overlap period is concern in backfire occurrence, and may be one of the methods for controlling back fire occurred in a H₂ engine.
4
[가솔린엔진] PIV 기법을 이용한 연소실내 화염전파과정중의 유동측정

박상욱(S.W. Park),노기철(K.C. Noh),정창현(C.H. Jeong),이종태(J.T. Lee) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
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In order to investigate the characteristics of gas flow during flame propagation process, the flow fields of unburned gas are Qualitatively and Quantitatively measured by using Nd-Yag laser PIY system. The main results are as follows ; After ignition, it is shown that the unburned gas in front of the flame spreads out in the direction of radius by compression effect of flame expansion. Although the flow pattern for fuel-air equivalence ratio are qualitatively similar to each other, the maximum expansion velocity of unburned gas is measured at the 1.1 in equivalence ratio. By comparing above results with those obtained by the flame velocity and burning velocity, it is also found that they have the difference of about 10%

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