분산상 모드를 이용한 1채널 최소 절삭유 가공 시스템의 미스트 포집 챔버 내 액화 현상 해석

The minimum quantity lubrication (MQL) system, which minimizes the use of a coolant, has recently been in the spotlight as a new machining system to overcome environmental problems. However the liquefaction of the oil mist at the collection chamber should be overcome. This study analyzes the oil mist liquefaction of the one-channel internal lubricant feed MQL system using computational fluid dynamics (CFD) and proposes the shape of the mist collection chamber that can reduce mist liquefaction. A discrete phase model (DPM) is used to simulate mist liquefaction, and the air and oil flow rates used in an actual MQL system are applied. After analyzing the reference model, a parametric study is conducted to derive the trend between the shape of the mist collection chamber and the liquefaction of the mist. The study results confirmed that the liquefaction can be reduced by changing the shape of the mist collection chamber.