中国机械工程 ›› 2026, Vol. 37 ›› Issue (10): 2556-2565.DOI: 10.3969/j.issn.1004-132X.2026.10.018

• 机械基础工程 • 上一篇    下一篇

面向切削冷却的高压CO2射流马赫盘结构优化调控

朱利斌1,2(), 陈冠宇1,2, 程鹏3, 赵旭1,2   

  1. 1.合肥工业大学机械工程学院, 合肥, 230009
    2.机械工业绿色设计与制造重点实验室, 合肥, 230009
    3.安徽省招标集团股份有限公司, 合肥, 230051
  • 收稿日期:2025-08-25 出版日期:2026-10-25 发布日期:2026-11-10
  • 通讯作者: 朱利斌
  • 作者简介:朱利斌*(通信作者),男,1990年生,博士、副教授。研究方向为绿色制造。E-mail:libinz@hfut.edu.cn。
  • 基金资助:
    安徽省自然科学基金(2408085ME125);中央高校基本科研业务费专项资金(JZ2025HGTB0192);国家自然科学基金(51905144)

Optimization and Regulation of Mach Disk Structure in High-pressure CO2 Jet for Cutting Cooling

ZHU Libin1,2(), CHEN Guanyu1,2, CHENG Peng3, ZHAO Xu1,2   

  1. 1.School of Mechanical Engineering,Hefei University of Technology,Hefei,230009
    2.Key Laboratory of Green Design and Manufacturing of Mechanical Industry,Hefei,230009
    3.Anhui Tendering Group Co. ,Ltd. ,Hefei,230051
  • Received:2025-08-25 Online:2026-10-25 Published:2026-11-10
  • Contact: ZHU Libin

摘要:

通过计算流体动力学和实验研究系统分析了高压CO2冷却射流的马赫盘结构特性并构建了马赫盘结构与质量流量、喷嘴直径和压力的关系式。基于SST k-ω湍流模型和欧拉两相流方法,建立含CO2凝结相的数值模型,并通过实验验证了模型的可靠性。研究结果表明:马赫盘位置和直径的仿真平均误差分别为5.34%和4.92%;针对常用马赫盘结构经验公式,比例系数CL约为0.52(低于常规气体0.6454),马赫盘直径系数α约为1.164;此外,质量流量对马赫盘结构的影响较压力更为显著,通过调节喷嘴直径和压力组合可实现马赫盘结构的优化控制。

关键词: 高压CO2射流, 马赫盘, 计算流体动力学, 马赫盘经验公式, 切削冷却

Abstract:

The structural characteristics of the Mach disk in high-pressure CO₂ jets were systematically analyzed through CFD and experimental investigations, and the relational expression between the Mach disk structure and the mass flow rate, nozzle diameter, and pressure was established. A numerical model incorporating the CO₂ condensed phase was developed using the SST k-ω turbulence model and the Eulerian two-phase flow approach, and its reliability was experimentally validated. The results indicated that the average simulation errors for the Mach disk position and diameter were 5.34% and 4.92%, respectively. For the widely used empirical formula of the Mach disk structure, the proportional coefficient CL was approximately 0.52 (lower than the conventional gas value of 0.6454), while the Mach disk diameter coefficient α was about 1.164. Furthermore, it was found that the mass flow rate had a more significant influence on the Mach disk structure than pressure, and effective control of the Mach disk structure could be achieved by adjusting the combination of nozzle diameter and pressure.

Key words: high-pressure CO? jet, Mach disk, computational fluid dynamics(CFD), empirical formula of Mach disk, cutting cooling

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