열유동 구조 연성 해석에 기초한 석탄 가스화 버너 헤드의 냉각 유로 및 재질에 따른 고온 성능 = Thermo-Fluid-Structural Coupled Analysis of Cooling Path and Material Effects on the High-Temperature Performance of Coal Gasification Burner Head

다국어 초록 (Multilingual Abstract)

In this study, a thermal-fluid-structure coupled analysis was performed to improve the thermal performance of a burner for a coal gasification power plant. After combustion analysis, an average temperature of 1,400°C was obtained, closely matching the actual coal gasification system environment. The highest burner tip surface temperature, 887°C, was achieved at the analysis variable, a coal fines inflow velocity of 8m/s. This temperature was mapped to a thermal-structural analysis model, and by increasing the radius of the cooling channel inside the burner to 5 mm, the analysis confirmed a reduction in thermal stress of approximately 20%. In particular, changing the material to HP50-Nb resulted in significantly superior cooling efficiency compared to Inconel 718 without any cooling channel design. The results of this study will be useful for the optimal design of coal gasification facilities as well as for improving the durability of the facilities.