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비정상 충류화염편 모델을 이용한 비예혼합 난류화염 해석
김성구(Seong Ku Kim),강성모(Sung Mo Kang),서보선(Bo Sun Seo),김용모(Yong Mo KIm) 한국분무공학회 2001 한국액체미립화학회지 Vol.6 No.3
The present study is focused on modeling the transient behavior of the local flame structure which is especially important for slow reaction processes, such as NOx formation in the radiating flame field. The unsteady flamelet model recently developed has been applied to analyze a steady, turbulent jet flame. Numerical results are compared with experimental data and numerical results of the conventional steady flamelet model. The numerical result reveals that the unsteady flamelet model correctly predicts the nonequilibrium effect upsteam and the subsequent decay of the superequilibrium radical concentrations further downstream.
김용모,Kim, Yong-Mo 한국연소학회 2000 한국연소학회지 Vol.5 No.2
The flamelet concept has been widely applied to numerically simulate complex phenomena occurred in nonpremixed turbulent flames last two decades, and recently broadened successfully the applicable capabilities to various combustion problems from simple laboratory flames to gas turbine engine, diesel spray combustion and partially premixed flames. The paper is focused on brief review of recently noticeable work related to flamelet modeling, which includes Lagrangian flamelet approach, RIF concept as well as steady flamelet approach. The limitation of steady flamelet assumption, the effect of transient behavior of flamelets, and the effect of spray vaporization on PDF model have been discussed.
단계식 연소사이클 로켓엔진용 삼중분사 예연소기의 초임계 화염구조 해석
김용모 ( Yong Mo Kim ),박상운 ( Sang Woon Park ) 한국액체미립화학회 2014 한국액체미립화학회 학술강연회 논문집 Vol.2014 No.-
This study has been mainly motivated to numerically model the triplex injector preburner combustion which is operated in supercritical conditions encountered in rocket engine cycle. In the present approach, turbulence is represented by the standard k-e model. To account for the real fluid effects, the propellant mixture properties are calculated by using generalized cubic equation of state. In order to realistically represent the turbulence-chemistry interaction in the turbulent nonpremixed swirl flames, the flamelet approach based on the real fluid flamelet library has been adopted. Based on numerical results for triplex injector preburner, the detailed discussions are made for the effects of O/F ratio, pressure on Kerosene/LOx flame structure in supercritical conditions..