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전기로 제강 더스트 배출 스크류 컨베이어의 냉각성능 수치해석
김병천(Byeongcheon Kim),이상욱(Sang-Wook Lee) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Numerical simulations are conducted to analyze the conjugate heat transfer of turbulent flow in conveying screw for a furnace using Ansys FLUENT. The coolant flow in a concentric tube contacts with solid wall and prevents corrosion by making solid wall temperature down. The helical fins are attached in the flow path in order to create helical flow. In this study, the effect of helical fin along flow path on cooling performance is investigated. The result of full height fin model showed that rotational flow driven by helical fin increases the cooling performance of conveying screw.
전기로 제강 더스트 배출 스크류 컨베이어의 냉각성능 수치해석
김병천(Byeongcheon Kim),장경식(Kyoungsik Chang),이상욱(Sang-Wook Lee) 한국전산유체공학회 2019 한국전산유체공학회지 Vol.24 No.2
A screw conveyor is used to discharge a large amount of slag and dust generated from an electric arc furnace in steel making process using scrap iron. Because it continuously operates in a high temperature environment, it is important to optimally design a cooling channel to minimize thermal corrosion damage. In this study, numerical analysis of conjugate heat transfer was carried out using Ansys Fluent, considering various geometric parameters of helically shaped flow guide fins in cooling channels, such as fin height and helical pitch. The higher the height of the helical fin and the smaller the pitch, the better the cooling performance. However, the pressure loss increases significantly. In particular, it can be seen that flow separation, which may degrade cooling performance, occurs in the inlet region of models with long pitch helical fin.