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메탄-공기 예혼합기에서의 층류 화염속도 및 화염두께 예측
권순익,보웬 필립,Kwon, Soon-Ik,Bowen, Philip J. 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.9
The thickness of flame and preheat zone from burning velocity which was computed by using Premix code of Chemkin program for methane-air mixture. Also the thickness was evaluated from temperature profile which is also obtained from Premix code for the equivalence ratio of 0.5 to 1.6. The computations were carried out for the laminar flame thickness and burning velocity under the unburned gas temperature 0.5bat-30bar and temperature of 300K-700K at ${\Phi}=l.0$. Comparison of the results showed no difference between these two methods. The flame thickness was decreased by increasing the pressure and temperature, but, the affect of pressure is more significant than the effect of temperature on the flame thickness. The thickness of preheat zone was about 66.5% of the flame thickness, and flame thickness and burning velocity were also predicted by using empirical equation.
권순익(Soon-Ik Kwon) 한국산업융합학회 1999 한국산업융합학회 논문집 Vol.2 No.1
It is necessary to observe the in-cylinder phenomena directly for understanding in-cylinder air motion, combustion and evaluation of the numerical simulation. This paper describes the usage, structure and peculiar technique in design, and introduces the examples of the analyses using the engine from the Honda R&D Technical Review.<br/>
권순익(Soon-Ik Kwon) 한국산업융합학회 2000 한국산업융합학회 논문집 Vol.3 No.2
The purpose of this study is to measure the compression temperature in cylinder by using the fine thermocouple. As for using the thermocouple, it's response time delay should be regarded, even if it is a fine one. So, the output of thermocouple needs some compensation. The compensation circuit, which consists of a differential and an adding circuit is used for the compensate the time lag. And the time constant of the compensation circuit is determined the time between the TDC and the maximum point of the thermocouple output. Using this compensation circuit, the compression temperature is investigated of the cylinder in the diesel engine.<br/> <br/>
권순익(Soon-Ik Kwon) 한국산업융합학회 2000 한국산업융합학회 논문집 Vol.3 No.4
We have accumulated the knowledge of the phenomena of external nature under the gravity fields of the earth, but have not the data of the natural phenomena under the high or low gravity fields. It is necessary to research the phenomena of the combustion, heat transfer and the behavior of the living animals under the high or low gravity fields. This paper introduces the mysterious universe in high and low gravity fields from the experimental study by Arai et al.<br/> <br/>
권순익(S.L Kwon),김완(W. Kim) 한국자동차공학회 1993 오토저널 Vol.15 No.1
Fuel injection system is an important tool in the exhaust emission and perfonnance of a diesel engine. Effects of the fuel injection system in diesel combustion was investigated experimentally by measuring the performance and analyzing the combustion phenomena in a D.I. diesel engine. The selected injection parameters were nozzle hole diameter, nozzle opening pressure, nozzle projection length, and nozzle spray angle.<br/> From the measured results, it is shown that the fuel injection pipe diameter is an effective means to improve engine perfonnance in a middle and high speed range and the 2 stage spring nozzle holder has the advantage of increasing the engine perfonnance due to the initial injection pressure in a low speed range. It has been also shown that increasing nozzle opening pressure resulted in decrease in smoke, but increase in NOx from the engine.
권순익(Soonik Kwon),김상진(Sangjin Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The laminar burning velocity were measured using a spherical combustion bomb with central ignition.<br/> Mixtures with equivalence ratio between 0.6 and 1.2, were tested. The computations: were carried out for the burning velocity using premix code of Chemkin program under the unburned gas pressure 0.5bar-30bar and temperature of 300K-700K at φ1.0, The results showed little difference between these two methods. The burning velocity was decreased by increasing the pressure and increased by increasing the temperature. The burning velocity was predicted by using the following equations.<br/> S_L(m/s)=S_st(T/300)^1.85(P)^-0.45 (0.5bar□P≤30bar, 300K□T≤ 700K)