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喷油嘴喷孔流道磨料流光整特性仿真与试验

李孟楠 董志国 郑志鑫 王硕

李孟楠, 董志国, 郑志鑫, 王硕. 喷油嘴喷孔流道磨料流光整特性仿真与试验[J]. 金刚石与磨料磨具工程, 2023, 43(2): 265-271. doi: 10.13394/j.cnki.jgszz.2022.0142
引用本文: 李孟楠, 董志国, 郑志鑫, 王硕. 喷油嘴喷孔流道磨料流光整特性仿真与试验[J]. 金刚石与磨料磨具工程, 2023, 43(2): 265-271. doi: 10.13394/j.cnki.jgszz.2022.0142
LI Mengnan, DONG Zhiguo, ZHENG Zhixin, WANG Shuo. Simulation and experiment of abrasive flow finishing characteristics of nozzle jetting hole runner[J]. Diamond & Abrasives Engineering, 2023, 43(2): 265-271. doi: 10.13394/j.cnki.jgszz.2022.0142
Citation: LI Mengnan, DONG Zhiguo, ZHENG Zhixin, WANG Shuo. Simulation and experiment of abrasive flow finishing characteristics of nozzle jetting hole runner[J]. Diamond & Abrasives Engineering, 2023, 43(2): 265-271. doi: 10.13394/j.cnki.jgszz.2022.0142

喷油嘴喷孔流道磨料流光整特性仿真与试验

doi: 10.13394/j.cnki.jgszz.2022.0142
基金项目: 山西省自然科学基金(2021-0302-123104)
详细信息
    作者简介:

    董志国,男,1975年生,博士、副教授。主要研究方向:磨料流光整加工。E-mail:dong_zhiguo@126.com

  • 中图分类号: TH161;TH164;TG58

Simulation and experiment of abrasive flow finishing characteristics of nozzle jetting hole runner

  • 摘要: 喷油嘴喷孔流道入口有一定入口倒角和喷孔锥度,能通过提高喷油嘴的燃油雾化效果来进一步提高发动机的效率。通过软性流体磨料对喷孔流道进行加工,使喷孔流道入口有一定的入口倒角和喷孔锥度。结果表明:在5 MPa、8 MPa的入口压力下,使用平均粒径为5 μm、质量分数为25%的软性磨料加工800 s后,测得喷孔入口倒角曲率半径分别为0.018 mm和0.010 mm,喷孔流道锥度为1°和3°。在不同的入口压力下,通过polyflow软件对软性流体磨料在喷孔流道的流动特性进行了分析,并通过试验进行验证,发现仿真与试验结果误差在允许的范围内,证明了数值分析的可靠性。

     

  • 图  1  软性流体磨料

    Figure  1.  Soft fluid abrasive

    图  2  材料去除原理示意图

    Figure  2.  Schematic illustration of the material removal principle

    图  3  工件壁面处磨粒的微切削过程[7]

    Figure  3.  Microcutting process of abrasive particles on workpiece wall surface[7]

    图  4  喷油嘴和几何模型

    Figure  4.  Fuel injectors and geometry

    图  5  喷油嘴网格划分

    Figure  5.  Injector nozzle meshing

    图  6  喷油嘴喷孔流道的仿真图

    Figure  6.  Simulation of the nozzle nozzle runner

    图  7  5 MPa下云图分布

    Figure  7.  5 MPa cloud map distribution

    图  8  喷油嘴流道入口区域模型

    Figure  8.  Injector runner inlet area model

    图  9  不同入口压力时的喷孔流道压力场

    Figure  9.  Nozzle runner pressure distribution for different inlet pressures

    图  10  不同入口压力时的喷孔流道速度场

    Figure  10.  Nozzle runner velocity distribution for different inlet pressures

    图  11  不同入口压力时的喷孔处的材料去除量

    Figure  11.  Material removal at different inlet pressures

    图  12  夹具

    Figure  12.  Clamp

    图  13  1号未加工喷油嘴流道

    Figure  13.  No. 1 unprocessed injector runner

    图  14  2号喷油嘴流道

    Figure  14.  No. 2 injector runner

    图  15  3号喷油嘴流道

    Figure  15.  No. 3 injector runner

    表  1  不同入口压力所得的锥度

    Table  1.   Taper for different inlet pressures

    入口压力 p / MPa直径差 ΔL / μm长度 H / μm锥度 θ /(°)
    516.831 0000.96
    854.021 0003.09
    1090.211 0005.17
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-07-04
  • 修回日期:  2022-09-27
  • 录用日期:  2022-09-29
  • 刊出日期:  2023-04-20

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