IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2019i11p2161-d237598.html
   My bibliography  Save this article

Large Eddy Simulation of Self-Excited Oscillation Pulsed Jet (SEOPJ) Induced by a Helmholtz Oscillator in Underground Mining

Author

Listed:
  • Zhenlong Fang

    (School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China)

  • Qiang Wu

    (School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China)

  • Mengda Zhang

    (School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China)

  • Haoyang Liu

    (School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China)

  • Pan Jiang

    (School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China)

  • Deng Li

    (School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China)

Abstract

Pulsed waterjet can break rocks effectively by taking advantage of the water hammer effect, and is thus widely used in mining, petroleum, and natural gas fields. With the aim to further clarify the flow field characteristics of pulsed jets induced by a Helmholtz oscillator, large eddy simulation was conducted under different operating pressures. The velocity distribution, mean flow field, and the coherent structure were examined using the oscillators of different cavity lengths and diameters. The results clearly showed that the major frequency of jet pulsation gradually increased with the increase of operating pressure. A stable periodic velocity core was formed at the outlet of the Helmholtz oscillator, while the external flow field was subjected to periodic impact. As a result, the ambient fluid was strongly entrained into the jet beam. With the increase of the cavity length, the length of the core segment decreased while the energy loss caused by the cavity increased, which was also accompanied by a rapid attenuation of the axial velocity at the jet outlet. The coherent structure of the jet in the oscillator with small cavity diameter was more disordered near the nozzle outlet, and the vortex scale was larger. The effect of cavity diameter can be reflected in the feedback modulation of the jet in the cavity. Compared with the conical nozzle, the length of the core section of the jet was shorter, but the jet had better bunching, a smaller diffusion angle, and better mixing performance. These results provide a further understanding of the characteristics of pulsed water jet for better utilizations in the fields of energy exploitation.

Suggested Citation

  • Zhenlong Fang & Qiang Wu & Mengda Zhang & Haoyang Liu & Pan Jiang & Deng Li, 2019. "Large Eddy Simulation of Self-Excited Oscillation Pulsed Jet (SEOPJ) Induced by a Helmholtz Oscillator in Underground Mining," Energies, MDPI, vol. 12(11), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2161-:d:237598
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/11/2161/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/12/11/2161/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Zhaolong Ge & Kai Deng & Yiyu Lu & Liang Cheng & Shaojie Zuo & Xingdi Tian, 2016. "A Novel Method for Borehole Blockage Removal and Experimental Study on a Hydraulic Self-Propelled Nozzle in Underground Coal Mines," Energies, MDPI, vol. 9(9), pages 1-13, August.
    2. Yiyu Lu & Zhe Zhou & Zhaolong Ge & Xinwei Zhang & Qian Li, 2015. "Research on and Design of a Self-Propelled Nozzle for the Tree-Type Drilling Technique in Underground Coal Mines," Energies, MDPI, vol. 8(12), pages 1-12, December.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Mengda Zhang & Zhenlong Fang & Yi’nan Qian, 2021. "Experimental Study on the Impingement Characteristics of Self-Excited Oscillation Supercritical CO 2 Jets Produced by Organ-Pipe Nozzles," Energies, MDPI, vol. 14(22), pages 1-15, November.
    2. Tengfei Cai & Yan Pan & Fei Ma & Pingping Xu, 2020. "Effects of Organ-Pipe Chamber Geometry on the Frequency and Erosion Characteristics of the Self-Excited Cavitating Waterjet," Energies, MDPI, vol. 13(4), pages 1-13, February.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Jiwei Wen & Chen Chen, 2017. "Optimizing the Structure of the Straight Cone Nozzle and the Parameters of Borehole Hydraulic Mining for Huadian Oil Shale Based on Experimental Research," Energies, MDPI, vol. 10(12), pages 1-14, December.
    2. Zhaolong Ge & Kai Deng & Liang Zhang & Shaojie Zuo, 2020. "Development potential evaluation of CO2‐ECBM in abandoned coal mines," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 10(3), pages 643-658, June.
    3. Rui Gao & Bin Yu & Hongchun Xia & Hongfei Duan, 2017. "Reduction of Stress Acting on a Thick, Deep Coal Seam by Protective-Seam Mining," Energies, MDPI, vol. 10(8), pages 1-15, August.
    4. Changping Li & Longchen Duan & Songcheng Tan & Victor Chikhotkin, 2018. "Influences on High-Voltage Electro Pulse Boring in Granite," Energies, MDPI, vol. 11(9), pages 1-17, September.
    5. Zhaolong Ge & Kai Deng & Yiyu Lu & Liang Cheng & Shaojie Zuo & Xingdi Tian, 2016. "A Novel Method for Borehole Blockage Removal and Experimental Study on a Hydraulic Self-Propelled Nozzle in Underground Coal Mines," Energies, MDPI, vol. 9(9), pages 1-13, August.
    6. Yiyu Lu & Songqiang Xiao & Zhaolong Ge & Zhe Zhou & Kai Deng, 2016. "Rock-Breaking Properties of Multi-Nozzle Bits for Tree-Type Drilling in Underground Coal Mines," Energies, MDPI, vol. 9(4), pages 1-17, March.
    7. Zhongxiang Liu & Minghui Wei & Peng Zhang & Yutao Zhang & Tingtao Lu & Rui Xiong & Changchun Qin, 2020. "Drilling Localization and Error Analysis of Radial Horizontal Jet Drilling Based on Magnetic Gradient Tensor," Energies, MDPI, vol. 13(19), pages 1-10, September.
    8. Yiyu Lu & Shaojie Zuo & Zhaolong Ge & Songqiang Xiao & Yugang Cheng, 2016. "Experimental Study of Crack Initiation and Extension Induced by Hydraulic Fracturing in a Tree-Type Borehole Array," Energies, MDPI, vol. 9(7), pages 1-15, June.
    9. Qian Li & Yiyu Lu & Zhaolong Ge & Zhe Zhou & Jingwei Zheng & Songqiang Xiao, 2017. "A New Tree-Type Fracturing Method for Stimulating Coal Seam Gas Reservoirs," Energies, MDPI, vol. 10(9), pages 1-14, September.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2161-:d:237598. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.