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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical study of flow and thermal characteristics in titanium alloy milling with hybrid nanofluid minimum quantity lubrication and cryogenic nitrogen cooling
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Numerical study of flow and thermal characteristics in titanium alloy milling with hybrid nanofluid minimum quantity lubrication and cryogenic nitrogen cooling

机译：用杂交纳米流体磨削钛合金碾磨流动和热特性的数值研究及低温氮气冷却

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摘要

The flow and heat transfer characteristics in titanium alloy (Ti-6Al-4V) milling with a hybrid nanofluid minimum quantity lubrication (nMQL) and cryogenic nitrogen lubrication/cooling method is numerically analyzed for two different cryogenic spraying conditions of N_2 (sensible cooling) and LN_2 (latent cooling), and three different nMQL nozzle spray angles of 0°, 45°, and 90°. The volume of fluid (VOF) model is employed to track the interface between each fluid, which is air, N_2, and LN_2. The discrete phase model (DPM) is used to solve the trajectory and temperature of nMQL droplets. The heat generation occurred during the milling process, and the phase change of the liquid nitrogen is modeled using the user-defined functions (UDF) in ANSYS Fluent. The results show that the LN_2 spraying condition provides extremely effective cooling of the Ti-6l-4V workpiece and tungsten carbide (WC) tool in the Ti-6Al-4V milling process. However, increased nMQL droplets pass through the cutting zone under the N_2 spraying condition, enhancing the lubrication. Moreover, the 0° nMQL spray angle is found to be best suited for improved cooling and lubrication performance under both the N_2 and LN_2 spraying conditions.
机译：用杂交纳米流体最小量润滑（NMQL）和低温氮气润滑/冷却方法的钛合金（Ti-6Al-4V）铣削的流动和传热特性进行了数值分析了N_2（明智冷却）的两种不同低温喷涂条件和LN_2（潜冷）和三种不同的NMQL喷嘴喷射角为0°，45°和90°。采用流体（VOF）模型的体积来跟踪每个流体之间的界面，该液体是空气，N_2和LN_2。离散相模型（DPM）用于解决NMQL液滴的轨迹和温度。在铣削过程中发生发热，并且使用ansys流畅的用户定义的函数（UDF）来建模液氮的相变。结果表明，在Ti-6AL-4V铣削过程中，LN_2喷涂条件提供了Ti-6L-4V工件和碳化钨（WC）工具的极其有效的冷却。然而，增加的NMQL液滴在N_2喷雾条件下通过切割区，增强润滑。此外，发现0°NMQL喷射角最适合于在N_2和LN_2喷涂条件下改善的冷却和润滑性能。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第5期|121005.1-121005.14|共14页
  • 作者

    Woo-Yul Kim; Santhosh Senguttuvan; Seong Hoon Kim; Sang Won Lee; Sung-Min Kim;

  • 作者单位

    School of Mechanical Engineering Sungkyunkwan University 300 Cheoncheon-dong Suwon I64I9 Republic of Korea;

    School of Mechanical Engineering Sungkyunkwan University 300 Cheoncheon-dong Suwon I64I9 Republic of Korea;

    School of Mechanical Engineering Sungkyunkwan University 300 Cheoncheon-dong Suwon I64I9 Republic of Korea;

    School of Mechanical Engineering Sungkyunkwan University 300 Cheoncheon-dong Suwon I64I9 Republic of Korea;

    School of Mechanical Engineering Sungkyunkwan University 300 Cheoncheon-dong Suwon I64I9 Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    phase change; volume of fluid method; discrete phase model; sliding mesh;

    机译：相变;流体方法的体积;离散相模型;滑动网格;

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