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조은성,성용진,정석호,Cho, Eun-Seong,Sung, Yong-Jin,Chung, Suk-Ho 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.1
Staged combustion, such as air- and fuel-staging, is a relatively well-known technique fur reduction of NOx emission and used in combination with other techniques nowadays. However, the design variables are still selected depending upon operating conditions. There are many variables tested to investigate the NOx emission characteristics fur changing of fuel or air velocity, swirl intensity, and staging ratio of air and fuel in multi-staged burner. In air-staging case, the fuel-rich condition of the primary combustion zone is very helpful to reduce NOx emission and its range is known to be restricted by the increase of carbon monoxide. However, in many cases carbon monoxide level is not too high to be restricted operating condition. So we tried to expand the equivalence ratio range to the richer condition in the primary combustion zone and certificate the function of each burner component and its contribution to the overall NOx production.
대향류 예혼합화염의 소염 메커니즘에 관한 수치해석적 연구
최상규(Sang-Kyu Choi),조은성(Eun-Seong Cho),정석호(Suk-Ho Chung) 한국연소학회 2009 KOSCOSYMPOSIUM논문집 Vol.- No.39
The extinction mechanisms of premixed flames are investigated numerically. A symmetric double premixed flame in a counterflow configuration is adopted as a model problem, and a local equilibrium temperature is used as a measure of energy loss or gain in order to quantify the extinction mechanism caused by preferential diffusion and incomplete reaction due to the stretch rate for CH₄, H₂, C₃H?, CO, CH₄+H₂, and CO+H₂ premixed flames. The energy loss ratios from preferential diffusion and incomplete reaction were calculated at various equivalence ratios near flame extinction. The Lewis number is responsible for these two distinct modes of flame extinction. Results show that the extinction of lean CH₄, H₂, CH₄+H₂, CO+H₂, and rich C3H? premixed flames results from incomplete reaction due to the insufficient reaction time, implying that the Lewis number is smaller than unity. On the contrary, rich CH₄, H₂, CH₄+H₂, CO+H₂, and lean C₃H? premixed flames are affected by the combined effects of preferential diffusion and incomplete reaction, which indicates that the Lewis number is larger than unity. In CO premixed flames, incomplete reaction was dominant in both lean and rich cases. The extinction mechanisms could be quantified by the local equilibrium temperature, and the effective Lewis numbers were assumed indirectly.
유전자 재조합 사람형 erythropoietin, GC-rhEPO의 약물동태 및 조직분포
김선돈 ( Sun Don Kim ),한성규 ( Seong Kyu Han ),이호성 ( Ho Sung Lee ),김성남 ( Seong Nam Kim ),정원휘 ( Wo Nee Chong ),백대현 ( Dae Hyun Baek ),조은성 ( Eun Sung Cho ),허재욱 ( Jae Wook Huh ),류판동 ( Pan Dong Ryu ) 한국응용약물학회 2000 Biomolecules & Therapeutics(구 응용약물학회지) Vol.8 No.2