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연소해석 가속화를 위한 솔루션 기반 적응형 메쉬 기술 개발
전상태(Sangtae Jeon),Sourabh Shrivastava,Ishan Verma,Rakesh Yadav,Pravin Nakod 한국연소학회 2022 KOSCOSYMPOSIUM논문집 Vol.2022 No.11
For systems where flame travel over time, accurate flame tracking plays a critical role in predicting the combustion characteristics of the system. Flame tracking with 3D computational fluid dynamics is a prerequisite for fine mesh resolution depending on the flame front. Solution-based mesh adaptation approach has been extensively studied by various research groups to maintain proper mesh resolutions generating the fine mesh needed in critical areas while maintaining the overall mesh count at an appropriate level.
문성진(Sungjin Moon),전상태(Sangtae Jeon),장범준(Beomjun Jang),김용모(Yongmo Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.6
The present study has numerically investigated the combustion processes of the pulverized coal. The pulverized coal combustion involves the complex physical processes such as devolatilization, char oxidation, turbulence-chemistry interaction, and radiative heat transfer. These physical processes are implemented in the framework of Eulerian-Lagrangian and Eulerian-Eulerian formulations. The pulverized coal combustion models developed in this study are validated against the experimental data of the pulverized coal jet flames. Numerical results indicate that the present approaches have the capability to realistically predict the essential features of pulverized coal combustion processes.
LES기반 연소모델과 Helmholtz 방정식을 이용한 LIMOUSINE 버너의 연소불안정 해석
신영준(Youngjun Shin),전상태(Sangtae Jeon),김용모(Yongmo Kim) 한국연소학회 2017 한국연소학회지 Vol.22 No.3
This study has numerically investigated the flame—acoustics interactions in the turbulent partially premixed flame field. In the present approach, in order to analyze the combustion instability, the present approach has employed the LES-based combustion model as well as the Helmholtz solver. Computations are made for the validation case of the partially premixed LIMOUSINE burner. In terms of the FFT data, numerical results are compared with experimental data. Moreover, Helmholtz equation in frequency domain is solved by combining CFD field data including the flight time from a nozzle to the flame zone. Based on numerical results, the detailed discussions are made for the essential features of the combustion instability encountered in the partially premixed burner.