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Analysis of computational fluid dynamics on design of nozzle for integrated cryogenic gas and MQL(minimum quantity lubrication)  

Song, Ki-Hyeok (Department of Mechanical Engineering, Inha University)
Shin, Bong-Cheol (Department of Mechanical Engineering, Inha University)
Yoon, Gil-Sang (Molds & Dies Technology R&B Group, Korea Institute of Industrial Technology)
Ha, Seok-Jae (Molds & Dies Technology R&B Group, Korea Institute of Industrial Technology)
Publication Information
Design & Manufacturing / v.13, no.3, 2019 , pp. 41-47 More about this Journal
Abstract
In conventional machining, the use of cutting fluid is essential to reduce cutting heat and to improve machining quality. However, to increase the performance of cutting fluids, various chemical components have been added. However, these chemical components during machining have a negative impact on the health of workers and cutting environment. In current machining, environment-friendly machining is conducted using MQL (minimum quantity lubrication) or cryogenic air spraying to minimize the harmful effects. In this study, the injection nozzle that can combined injecting minimum quantity lubrication(MQL) and cryogenic gas was designed and the shape optimization was performed by using computational fluid dynamics(CFD) and design of experiment(DOE). Performance verification was performed for the designed nozzle. The diameter of the sprayed fluid at a distance of 30 mm from the nozzle was analyzed to be 21 mm. It was also analyzed to lower the aerosol temperature to about 260~270K.
Keywords
CFD(computational fluid dynamics); Cryogenic gas; Integrated nozzle; MQL(minimum quantity lubrication); Spray behavior;
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